/usr/bin/java -Xmx8000000000 -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-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 19:20:35,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 19:20:35,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 19:20:35,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-12 19:20:35,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-12 19:20:35,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-12 19:20:35,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-12 19:20:35,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-12 19:20:35,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-12 19:20:35,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-12 19:20:35,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-12 19:20:35,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-12 19:20:35,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-12 19:20:35,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-12 19:20:35,745 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-12 19:20:35,745 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-12 19:20:35,748 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-12 19:20:35,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-12 19:20:35,751 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-12 19:20:35,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-12 19:20:35,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-12 19:20:35,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-12 19:20:35,753 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-12 19:20:35,753 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-12 19:20:35,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-12 19:20:35,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-12 19:20:35,754 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-12 19:20:35,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-12 19:20:35,756 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 [2021-08-12 19:20:35,775 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 19:20:35,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 19:20:35,775 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 19:20:35,776 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 19:20:35,777 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 19:20:35,777 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 19:20:35,777 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 19:20:35,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 19:20:35,777 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 19:20:35,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 19:20:35,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 19:20:35,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 19:20:35,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 19:20:35,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 19:20:35,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 19:20:35,778 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 19:20:35,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 19:20:35,778 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 19:20:35,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 19:20:35,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 19:20:35,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 19:20:35,779 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 19:20:35,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 19:20:35,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 19:20:35,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 19:20:35,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 19:20:35,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 19:20:35,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 19:20:35,780 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 19:20:35,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 19:20:35,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 19:20:36,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 19:20:36,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 19:20:36,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 19:20:36,065 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-12 19:20:36,067 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-12 19:20:36,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl [2021-08-12 19:20:36,068 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-2.wvr.bpl' [2021-08-12 19:20:36,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 19:20:36,111 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-12 19:20:36,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 19:20:36,118 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 19:20:36,118 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 19:20:36,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:20:36" (1/1) ... [2021-08-12 19:20:36,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:20:36" (1/1) ... [2021-08-12 19:20:36,142 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 19:20:36,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 19:20:36,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 19:20:36,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 19:20:36,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:20:36" (1/1) ... [2021-08-12 19:20:36,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:20:36" (1/1) ... [2021-08-12 19:20:36,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:20:36" (1/1) ... [2021-08-12 19:20:36,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:20:36" (1/1) ... [2021-08-12 19:20:36,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:20:36" (1/1) ... [2021-08-12 19:20:36,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:20:36" (1/1) ... [2021-08-12 19:20:36,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:20:36" (1/1) ... [2021-08-12 19:20:36,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 19:20:36,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 19:20:36,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 19:20:36,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 19:20:36,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:20:36" (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 [2021-08-12 19:20:36,242 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-12 19:20:36,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-12 19:20:36,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-12 19:20:36,244 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-12 19:20:36,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-12 19:20:36,245 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-12 19:20:36,245 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-12 19:20:36,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 19:20:36,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 19:20:36,245 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-12 19:20:36,245 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-12 19:20:36,246 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-12 19:20:36,247 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-12 19:20:36,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-12 19:20:36,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-12 19:20:36,247 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-08-12 19:20:36,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-08-12 19:20:36,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-08-12 19:20:36,248 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-08-12 19:20:36,248 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-08-12 19:20:36,249 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-08-12 19:20:36,250 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 19:20:36,503 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 19:20:36,504 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-12 19:20:36,504 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-12 19:20:36,505 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-08-12 19:20:36,505 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread5EXIT is neither atomic block end nor error location. [2021-08-12 19:20:36,505 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread6EXIT is neither atomic block end nor error location. [2021-08-12 19:20:36,507 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:20:36 BoogieIcfgContainer [2021-08-12 19:20:36,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 19:20:36,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 19:20:36,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 19:20:36,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 19:20:36,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.08 07:20:36" (1/2) ... [2021-08-12 19:20:36,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7b7a6b and model type parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 07:20:36, skipping insertion in model container [2021-08-12 19:20:36,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 07:20:36" (2/2) ... [2021-08-12 19:20:36,513 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-2.wvr.bpl [2021-08-12 19:20:36,517 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 19:20:36,517 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 19:20:36,518 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 19:20:36,645 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-08-12 19:20:36,664 INFO L255 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-08-12 19:20:36,684 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 19:20:36,684 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 19:20:36,684 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 19:20:36,684 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 19:20:36,684 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 19:20:36,684 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 19:20:36,685 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 19:20:36,685 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 19:20:36,694 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 55 transitions, 182 flow [2021-08-12 19:20:36,771 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:20:36,804 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:36,804 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:36,805 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:36,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:36,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1598114992, now seen corresponding path program 1 times [2021-08-12 19:20:36,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:36,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301611417] [2021-08-12 19:20:36,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:37,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:37,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301611417] [2021-08-12 19:20:37,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301611417] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:20:37,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:20:37,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:20:37,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446987868] [2021-08-12 19:20:37,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:20:37,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:37,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:20:37,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:20:37,076 INFO L87 Difference]: Start difference. First operand has 447 states, 445 states have (on average 3.7865168539325844) internal successors, (1685), 446 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:37,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:37,286 INFO L93 Difference]: Finished difference Result 897 states and 3374 transitions. [2021-08-12 19:20:37,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:20:37,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:20:37,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:37,321 INFO L225 Difference]: With dead ends: 897 [2021-08-12 19:20:37,322 INFO L226 Difference]: Without dead ends: 874 [2021-08-12 19:20:37,324 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:20:37,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-08-12 19:20:37,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 598. [2021-08-12 19:20:37,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.809045226130653) internal successors, (2274), 597 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 2274 transitions. [2021-08-12 19:20:37,438 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 2274 transitions. Word has length 25 [2021-08-12 19:20:37,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:37,439 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 2274 transitions. [2021-08-12 19:20:37,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 2274 transitions. [2021-08-12 19:20:37,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-12 19:20:37,443 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:37,443 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:37,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 19:20:37,443 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:37,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:37,448 INFO L82 PathProgramCache]: Analyzing trace with hash -841782840, now seen corresponding path program 2 times [2021-08-12 19:20:37,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:37,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366532868] [2021-08-12 19:20:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:37,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:37,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366532868] [2021-08-12 19:20:37,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366532868] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:20:37,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:20:37,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-12 19:20:37,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522814713] [2021-08-12 19:20:37,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:20:37,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:37,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:20:37,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:20:37,545 INFO L87 Difference]: Start difference. First operand 598 states and 2274 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:37,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:37,643 INFO L93 Difference]: Finished difference Result 874 states and 3321 transitions. [2021-08-12 19:20:37,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:20:37,643 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-12 19:20:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:37,650 INFO L225 Difference]: With dead ends: 874 [2021-08-12 19:20:37,650 INFO L226 Difference]: Without dead ends: 841 [2021-08-12 19:20:37,652 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:20:37,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-08-12 19:20:37,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 596. [2021-08-12 19:20:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.7663865546218487) internal successors, (2241), 595 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:37,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 2241 transitions. [2021-08-12 19:20:37,691 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 2241 transitions. Word has length 25 [2021-08-12 19:20:37,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:37,693 INFO L482 AbstractCegarLoop]: Abstraction has 596 states and 2241 transitions. [2021-08-12 19:20:37,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:37,694 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 2241 transitions. [2021-08-12 19:20:37,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:20:37,696 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:37,696 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:37,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 19:20:37,696 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:37,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:37,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1312476017, now seen corresponding path program 1 times [2021-08-12 19:20:37,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:37,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325157199] [2021-08-12 19:20:37,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:37,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:37,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325157199] [2021-08-12 19:20:37,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325157199] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:37,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73610386] [2021-08-12 19:20:37,789 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 [2021-08-12 19:20:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:37,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 19:20:37,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:38,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73610386] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:20:38,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-12 19:20:38,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-08-12 19:20:38,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485025687] [2021-08-12 19:20:38,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:20:38,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:38,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:20:38,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:20:38,058 INFO L87 Difference]: Start difference. First operand 596 states and 2241 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:38,137 INFO L93 Difference]: Finished difference Result 946 states and 3465 transitions. [2021-08-12 19:20:38,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:20:38,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:20:38,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:38,143 INFO L225 Difference]: With dead ends: 946 [2021-08-12 19:20:38,143 INFO L226 Difference]: Without dead ends: 836 [2021-08-12 19:20:38,145 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:20:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2021-08-12 19:20:38,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 734. [2021-08-12 19:20:38,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 3.8663028649386084) internal successors, (2834), 733 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 2834 transitions. [2021-08-12 19:20:38,182 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 2834 transitions. Word has length 27 [2021-08-12 19:20:38,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:38,182 INFO L482 AbstractCegarLoop]: Abstraction has 734 states and 2834 transitions. [2021-08-12 19:20:38,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:38,183 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 2834 transitions. [2021-08-12 19:20:38,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:20:38,185 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:38,185 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:38,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-12 19:20:38,409 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:38,410 INFO L82 PathProgramCache]: Analyzing trace with hash 731220239, now seen corresponding path program 2 times [2021-08-12 19:20:38,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:38,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62624083] [2021-08-12 19:20:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:38,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:38,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62624083] [2021-08-12 19:20:38,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62624083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:38,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770708473] [2021-08-12 19:20:38,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:38,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:38,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:38,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:20:38,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:38,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770708473] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:38,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:38,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-12 19:20:38,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486759886] [2021-08-12 19:20:38,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:20:38,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:38,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:20:38,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:20:38,635 INFO L87 Difference]: Start difference. First operand 734 states and 2834 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:38,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:38,835 INFO L93 Difference]: Finished difference Result 1739 states and 6504 transitions. [2021-08-12 19:20:38,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:20:38,836 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:20:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:38,847 INFO L225 Difference]: With dead ends: 1739 [2021-08-12 19:20:38,848 INFO L226 Difference]: Without dead ends: 1532 [2021-08-12 19:20:38,850 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:20:38,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1532 states. [2021-08-12 19:20:38,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1532 to 1029. [2021-08-12 19:20:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 4.135214007782102) internal successors, (4251), 1028 states have internal predecessors, (4251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 4251 transitions. [2021-08-12 19:20:38,907 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 4251 transitions. Word has length 27 [2021-08-12 19:20:38,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:38,907 INFO L482 AbstractCegarLoop]: Abstraction has 1029 states and 4251 transitions. [2021-08-12 19:20:38,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:38,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 4251 transitions. [2021-08-12 19:20:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:20:38,911 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:38,911 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:39,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:39,125 INFO L430 AbstractCegarLoop]: === Iteration 5 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:39,126 INFO L82 PathProgramCache]: Analyzing trace with hash -700559147, now seen corresponding path program 3 times [2021-08-12 19:20:39,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:39,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752509048] [2021-08-12 19:20:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:39,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:39,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752509048] [2021-08-12 19:20:39,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752509048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:39,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552274290] [2021-08-12 19:20:39,206 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 [2021-08-12 19:20:39,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:20:39,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:39,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-12 19:20:39,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:39,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552274290] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:20:39,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-12 19:20:39,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-08-12 19:20:39,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019429734] [2021-08-12 19:20:39,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-08-12 19:20:39,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:39,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-12 19:20:39,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:20:39,372 INFO L87 Difference]: Start difference. First operand 1029 states and 4251 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:39,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:39,480 INFO L93 Difference]: Finished difference Result 1346 states and 5163 transitions. [2021-08-12 19:20:39,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-12 19:20:39,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:20:39,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:39,490 INFO L225 Difference]: With dead ends: 1346 [2021-08-12 19:20:39,491 INFO L226 Difference]: Without dead ends: 1250 [2021-08-12 19:20:39,492 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:20:39,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-08-12 19:20:39,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 954. [2021-08-12 19:20:39,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 4.074501573976915) internal successors, (3883), 953 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:39,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3883 transitions. [2021-08-12 19:20:39,539 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3883 transitions. Word has length 27 [2021-08-12 19:20:39,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:39,540 INFO L482 AbstractCegarLoop]: Abstraction has 954 states and 3883 transitions. [2021-08-12 19:20:39,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3883 transitions. [2021-08-12 19:20:39,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:20:39,544 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:39,544 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:39,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:39,761 INFO L430 AbstractCegarLoop]: === Iteration 6 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:39,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:39,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1769205167, now seen corresponding path program 1 times [2021-08-12 19:20:39,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:39,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399120830] [2021-08-12 19:20:39,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:39,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:39,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399120830] [2021-08-12 19:20:39,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399120830] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:39,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033110191] [2021-08-12 19:20:39,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:39,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-12 19:20:39,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:39,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033110191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:39,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:39,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-08-12 19:20:39,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127309706] [2021-08-12 19:20:39,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 19:20:39,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:39,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 19:20:39,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-12 19:20:39,920 INFO L87 Difference]: Start difference. First operand 954 states and 3883 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:40,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:40,074 INFO L93 Difference]: Finished difference Result 1951 states and 7688 transitions. [2021-08-12 19:20:40,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-12 19:20:40,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:20:40,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:40,090 INFO L225 Difference]: With dead ends: 1951 [2021-08-12 19:20:40,090 INFO L226 Difference]: Without dead ends: 1828 [2021-08-12 19:20:40,091 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:20:40,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1828 states. [2021-08-12 19:20:40,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1443. [2021-08-12 19:20:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1442 states have (on average 4.125520110957004) internal successors, (5949), 1442 states have internal predecessors, (5949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:40,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 5949 transitions. [2021-08-12 19:20:40,153 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 5949 transitions. Word has length 27 [2021-08-12 19:20:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:40,153 INFO L482 AbstractCegarLoop]: Abstraction has 1443 states and 5949 transitions. [2021-08-12 19:20:40,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:40,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 5949 transitions. [2021-08-12 19:20:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-12 19:20:40,159 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:40,159 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:40,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:40,382 INFO L430 AbstractCegarLoop]: === Iteration 7 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:40,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:40,383 INFO L82 PathProgramCache]: Analyzing trace with hash 55195285, now seen corresponding path program 2 times [2021-08-12 19:20:40,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:40,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765332706] [2021-08-12 19:20:40,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:40,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:40,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765332706] [2021-08-12 19:20:40,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765332706] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 19:20:40,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 19:20:40,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-12 19:20:40,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086367927] [2021-08-12 19:20:40,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-08-12 19:20:40,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:40,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-12 19:20:40,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-12 19:20:40,416 INFO L87 Difference]: Start difference. First operand 1443 states and 5949 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:40,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:40,492 INFO L93 Difference]: Finished difference Result 1542 states and 6185 transitions. [2021-08-12 19:20:40,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-12 19:20:40,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-12 19:20:40,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:40,504 INFO L225 Difference]: With dead ends: 1542 [2021-08-12 19:20:40,504 INFO L226 Difference]: Without dead ends: 1437 [2021-08-12 19:20:40,505 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-12 19:20:40,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2021-08-12 19:20:40,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1422. [2021-08-12 19:20:40,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1421 states have (on average 4.130190007037298) internal successors, (5869), 1421 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 5869 transitions. [2021-08-12 19:20:40,556 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 5869 transitions. Word has length 27 [2021-08-12 19:20:40,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:40,556 INFO L482 AbstractCegarLoop]: Abstraction has 1422 states and 5869 transitions. [2021-08-12 19:20:40,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 5869 transitions. [2021-08-12 19:20:40,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:20:40,561 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:40,561 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:40,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-12 19:20:40,561 INFO L430 AbstractCegarLoop]: === Iteration 8 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:40,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:40,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1098192368, now seen corresponding path program 1 times [2021-08-12 19:20:40,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:40,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535161185] [2021-08-12 19:20:40,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:40,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:40,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535161185] [2021-08-12 19:20:40,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535161185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:40,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959462941] [2021-08-12 19:20:40,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:40,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:20:40,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:41,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-08-12 19:20:41,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:20:41,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:41,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:41,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-08-12 19:20:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:41,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959462941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:41,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:41,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-12 19:20:41,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658198005] [2021-08-12 19:20:41,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:41,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:41,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:41,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:41,125 INFO L87 Difference]: Start difference. First operand 1422 states and 5869 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:41,990 INFO L93 Difference]: Finished difference Result 1987 states and 8095 transitions. [2021-08-12 19:20:41,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:20:41,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:20:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:42,005 INFO L225 Difference]: With dead ends: 1987 [2021-08-12 19:20:42,005 INFO L226 Difference]: Without dead ends: 1966 [2021-08-12 19:20:42,006 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 677.8ms TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:20:42,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-08-12 19:20:42,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1519. [2021-08-12 19:20:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 4.118577075098814) internal successors, (6252), 1518 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 6252 transitions. [2021-08-12 19:20:42,072 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 6252 transitions. Word has length 29 [2021-08-12 19:20:42,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:42,072 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 6252 transitions. [2021-08-12 19:20:42,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 6252 transitions. [2021-08-12 19:20:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:20:42,077 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:42,077 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:42,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:42,293 INFO L430 AbstractCegarLoop]: === Iteration 9 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:42,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:42,293 INFO L82 PathProgramCache]: Analyzing trace with hash 863481530, now seen corresponding path program 2 times [2021-08-12 19:20:42,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:42,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785329115] [2021-08-12 19:20:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:42,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:42,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785329115] [2021-08-12 19:20:42,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785329115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:42,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272050841] [2021-08-12 19:20:42,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:42,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:42,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:42,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:20:42,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:42,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:42,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:20:42,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:20:42,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:42,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:42,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-08-12 19:20:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:42,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272050841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:42,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:42,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:42,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662234869] [2021-08-12 19:20:42,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:42,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:42,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:42,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:42,794 INFO L87 Difference]: Start difference. First operand 1519 states and 6252 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:43,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:43,341 INFO L93 Difference]: Finished difference Result 1824 states and 7416 transitions. [2021-08-12 19:20:43,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:20:43,341 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:20:43,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:43,359 INFO L225 Difference]: With dead ends: 1824 [2021-08-12 19:20:43,360 INFO L226 Difference]: Without dead ends: 1803 [2021-08-12 19:20:43,360 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 418.2ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:20:43,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803 states. [2021-08-12 19:20:43,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1522. [2021-08-12 19:20:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 4.117028270874425) internal successors, (6262), 1521 states have internal predecessors, (6262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 6262 transitions. [2021-08-12 19:20:43,428 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 6262 transitions. Word has length 29 [2021-08-12 19:20:43,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:43,429 INFO L482 AbstractCegarLoop]: Abstraction has 1522 states and 6262 transitions. [2021-08-12 19:20:43,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:43,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 6262 transitions. [2021-08-12 19:20:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:20:43,435 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:43,435 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:43,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:43,657 INFO L430 AbstractCegarLoop]: === Iteration 10 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:43,658 INFO L82 PathProgramCache]: Analyzing trace with hash 299884106, now seen corresponding path program 3 times [2021-08-12 19:20:43,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:43,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542672616] [2021-08-12 19:20:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:43,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:43,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542672616] [2021-08-12 19:20:43,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542672616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:43,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109294756] [2021-08-12 19:20:43,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:20:43,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:20:43,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:43,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:20:43,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:43,992 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:43,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:20:43,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:20:44,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:44,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:44,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-08-12 19:20:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:44,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109294756] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:44,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:44,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:44,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477754415] [2021-08-12 19:20:44,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:44,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:44,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:44,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:44,133 INFO L87 Difference]: Start difference. First operand 1522 states and 6262 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:44,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:44,652 INFO L93 Difference]: Finished difference Result 1921 states and 7751 transitions. [2021-08-12 19:20:44,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:20:44,653 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:20:44,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:44,680 INFO L225 Difference]: With dead ends: 1921 [2021-08-12 19:20:44,681 INFO L226 Difference]: Without dead ends: 1900 [2021-08-12 19:20:44,682 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 413.7ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:20:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2021-08-12 19:20:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1529. [2021-08-12 19:20:44,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 4.111910994764398) internal successors, (6283), 1528 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 6283 transitions. [2021-08-12 19:20:44,778 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 6283 transitions. Word has length 29 [2021-08-12 19:20:44,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:44,779 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 6283 transitions. [2021-08-12 19:20:44,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:44,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 6283 transitions. [2021-08-12 19:20:44,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:20:44,784 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:44,784 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:45,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-12 19:20:45,008 INFO L430 AbstractCegarLoop]: === Iteration 11 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:45,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:45,008 INFO L82 PathProgramCache]: Analyzing trace with hash -71340900, now seen corresponding path program 4 times [2021-08-12 19:20:45,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:45,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70638270] [2021-08-12 19:20:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:45,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:45,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70638270] [2021-08-12 19:20:45,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70638270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:45,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976341028] [2021-08-12 19:20:45,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:20:45,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:20:45,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:45,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:20:45,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:45,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-08-12 19:20:45,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:20:45,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:45,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:45,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:15 [2021-08-12 19:20:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:45,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976341028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:45,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:45,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-12 19:20:45,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642629141] [2021-08-12 19:20:45,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:45,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:45,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:45,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:45,403 INFO L87 Difference]: Start difference. First operand 1529 states and 6283 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:46,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:46,369 INFO L93 Difference]: Finished difference Result 2652 states and 10622 transitions. [2021-08-12 19:20:46,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:20:46,370 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:20:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:46,383 INFO L225 Difference]: With dead ends: 2652 [2021-08-12 19:20:46,383 INFO L226 Difference]: Without dead ends: 2626 [2021-08-12 19:20:46,384 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 539.1ms TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:20:46,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-08-12 19:20:46,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 1650. [2021-08-12 19:20:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 4.138872043662826) internal successors, (6825), 1649 states have internal predecessors, (6825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:46,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 6825 transitions. [2021-08-12 19:20:46,477 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 6825 transitions. Word has length 29 [2021-08-12 19:20:46,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:46,477 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 6825 transitions. [2021-08-12 19:20:46,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:46,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 6825 transitions. [2021-08-12 19:20:46,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:20:46,482 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:46,482 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:46,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-12 19:20:46,702 INFO L430 AbstractCegarLoop]: === Iteration 12 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:46,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:46,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1739734342, now seen corresponding path program 5 times [2021-08-12 19:20:46,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:46,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291856338] [2021-08-12 19:20:46,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:46,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:46,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291856338] [2021-08-12 19:20:46,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291856338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:46,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396102114] [2021-08-12 19:20:46,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:46,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:46,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:46,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:20:46,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:47,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-08-12 19:20:47,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:20:47,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:47,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:47,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:15 [2021-08-12 19:20:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:47,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396102114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:47,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:47,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-12 19:20:47,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294593332] [2021-08-12 19:20:47,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:47,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:47,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:47,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:47,145 INFO L87 Difference]: Start difference. First operand 1650 states and 6825 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:48,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:48,025 INFO L93 Difference]: Finished difference Result 2699 states and 10753 transitions. [2021-08-12 19:20:48,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:20:48,026 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:20:48,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:48,037 INFO L225 Difference]: With dead ends: 2699 [2021-08-12 19:20:48,037 INFO L226 Difference]: Without dead ends: 2648 [2021-08-12 19:20:48,038 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 542.0ms TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:20:48,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2021-08-12 19:20:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 1614. [2021-08-12 19:20:48,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1613 states have (on average 4.145071295722257) internal successors, (6686), 1613 states have internal predecessors, (6686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:48,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 6686 transitions. [2021-08-12 19:20:48,114 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 6686 transitions. Word has length 29 [2021-08-12 19:20:48,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:48,114 INFO L482 AbstractCegarLoop]: Abstraction has 1614 states and 6686 transitions. [2021-08-12 19:20:48,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:48,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 6686 transitions. [2021-08-12 19:20:48,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:20:48,118 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:48,119 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:48,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:48,332 INFO L430 AbstractCegarLoop]: === Iteration 13 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:48,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:48,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1333837744, now seen corresponding path program 6 times [2021-08-12 19:20:48,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:48,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430862956] [2021-08-12 19:20:48,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:48,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:48,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430862956] [2021-08-12 19:20:48,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430862956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:48,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111033233] [2021-08-12 19:20:48,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:48,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:20:48,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:48,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:20:48,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:48,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-08-12 19:20:48,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:20:48,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:48,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:48,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:20 [2021-08-12 19:20:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:48,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111033233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:48,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:48,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-12 19:20:48,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794107176] [2021-08-12 19:20:48,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:20:48,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:48,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:20:48,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:20:48,760 INFO L87 Difference]: Start difference. First operand 1614 states and 6686 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:49,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:49,800 INFO L93 Difference]: Finished difference Result 2295 states and 9359 transitions. [2021-08-12 19:20:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:20:49,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:20:49,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:49,809 INFO L225 Difference]: With dead ends: 2295 [2021-08-12 19:20:49,810 INFO L226 Difference]: Without dead ends: 2274 [2021-08-12 19:20:49,811 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 689.5ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:20:49,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-08-12 19:20:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 1602. [2021-08-12 19:20:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1601 states have (on average 4.147407870081199) internal successors, (6640), 1601 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 6640 transitions. [2021-08-12 19:20:49,879 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 6640 transitions. Word has length 29 [2021-08-12 19:20:49,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:49,879 INFO L482 AbstractCegarLoop]: Abstraction has 1602 states and 6640 transitions. [2021-08-12 19:20:49,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:49,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 6640 transitions. [2021-08-12 19:20:49,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:20:49,883 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:49,883 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:50,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:50,097 INFO L430 AbstractCegarLoop]: === Iteration 14 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:50,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:50,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2042972034, now seen corresponding path program 7 times [2021-08-12 19:20:50,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:50,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417616797] [2021-08-12 19:20:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:50,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:50,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417616797] [2021-08-12 19:20:50,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417616797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:50,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486968304] [2021-08-12 19:20:50,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:20:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:50,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:20:50,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:50,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-12 19:20:50,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:20:50,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:50,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:50,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-08-12 19:20:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:50,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486968304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:50,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:50,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-12 19:20:50,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649872407] [2021-08-12 19:20:50,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:50,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:50,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:50,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:50,491 INFO L87 Difference]: Start difference. First operand 1602 states and 6640 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:51,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:51,502 INFO L93 Difference]: Finished difference Result 2623 states and 10634 transitions. [2021-08-12 19:20:51,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:20:51,502 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:20:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:51,513 INFO L225 Difference]: With dead ends: 2623 [2021-08-12 19:20:51,513 INFO L226 Difference]: Without dead ends: 2583 [2021-08-12 19:20:51,514 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 685.7ms TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:20:51,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2021-08-12 19:20:51,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 1794. [2021-08-12 19:20:51,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 4.1751254880089235) internal successors, (7486), 1793 states have internal predecessors, (7486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:51,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 7486 transitions. [2021-08-12 19:20:51,602 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 7486 transitions. Word has length 29 [2021-08-12 19:20:51,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:51,602 INFO L482 AbstractCegarLoop]: Abstraction has 1794 states and 7486 transitions. [2021-08-12 19:20:51,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:51,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 7486 transitions. [2021-08-12 19:20:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:20:51,606 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:51,606 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:51,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-12 19:20:51,821 INFO L430 AbstractCegarLoop]: === Iteration 15 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash -739699428, now seen corresponding path program 8 times [2021-08-12 19:20:51,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:51,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482571972] [2021-08-12 19:20:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:51,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:51,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482571972] [2021-08-12 19:20:51,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482571972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:51,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018978266] [2021-08-12 19:20:51,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:51,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:51,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:51,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:20:51,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:52,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:52,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-08-12 19:20:52,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:20:52,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:52,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:52,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:20:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:52,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018978266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:52,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:52,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:52,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215795720] [2021-08-12 19:20:52,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:52,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:52,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:52,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:52,210 INFO L87 Difference]: Start difference. First operand 1794 states and 7486 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:52,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:52,741 INFO L93 Difference]: Finished difference Result 2156 states and 8859 transitions. [2021-08-12 19:20:52,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:20:52,742 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:20:52,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:52,750 INFO L225 Difference]: With dead ends: 2156 [2021-08-12 19:20:52,751 INFO L226 Difference]: Without dead ends: 2141 [2021-08-12 19:20:52,751 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 387.4ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:20:52,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2021-08-12 19:20:52,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 1787. [2021-08-12 19:20:52,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1786 states have (on average 4.1780515117581185) internal successors, (7462), 1786 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:52,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 7462 transitions. [2021-08-12 19:20:52,834 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 7462 transitions. Word has length 29 [2021-08-12 19:20:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:52,834 INFO L482 AbstractCegarLoop]: Abstraction has 1787 states and 7462 transitions. [2021-08-12 19:20:52,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 7462 transitions. [2021-08-12 19:20:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:20:52,838 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:52,838 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:53,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 19:20:53,053 INFO L430 AbstractCegarLoop]: === Iteration 16 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:53,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:53,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1639061500, now seen corresponding path program 9 times [2021-08-12 19:20:53,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:53,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909188624] [2021-08-12 19:20:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:53,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:53,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909188624] [2021-08-12 19:20:53,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909188624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:53,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635207507] [2021-08-12 19:20:53,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:20:53,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:20:53,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:53,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:20:53,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:53,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:53,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-12 19:20:53,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:20:53,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:53,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:53,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-08-12 19:20:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:53,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635207507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:53,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:53,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:53,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814497556] [2021-08-12 19:20:53,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:53,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:53,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:53,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:53,470 INFO L87 Difference]: Start difference. First operand 1787 states and 7462 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:54,011 INFO L93 Difference]: Finished difference Result 2191 states and 8942 transitions. [2021-08-12 19:20:54,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:20:54,012 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:20:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:54,025 INFO L225 Difference]: With dead ends: 2191 [2021-08-12 19:20:54,026 INFO L226 Difference]: Without dead ends: 2174 [2021-08-12 19:20:54,026 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 342.2ms TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:20:54,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-08-12 19:20:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 1794. [2021-08-12 19:20:54,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1794 states, 1793 states have (on average 4.173452314556609) internal successors, (7483), 1793 states have internal predecessors, (7483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:54,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1794 states to 1794 states and 7483 transitions. [2021-08-12 19:20:54,126 INFO L78 Accepts]: Start accepts. Automaton has 1794 states and 7483 transitions. Word has length 29 [2021-08-12 19:20:54,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:54,127 INFO L482 AbstractCegarLoop]: Abstraction has 1794 states and 7483 transitions. [2021-08-12 19:20:54,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:54,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1794 states and 7483 transitions. [2021-08-12 19:20:54,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:20:54,132 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:54,132 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:54,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-12 19:20:54,348 INFO L430 AbstractCegarLoop]: === Iteration 17 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:54,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:54,349 INFO L82 PathProgramCache]: Analyzing trace with hash 875307494, now seen corresponding path program 10 times [2021-08-12 19:20:54,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:54,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847083977] [2021-08-12 19:20:54,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:54,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:54,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:54,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847083977] [2021-08-12 19:20:54,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847083977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:54,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705215964] [2021-08-12 19:20:54,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:54,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:20:54,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:54,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:20:54,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:54,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-12 19:20:54,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:20:54,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:54,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:54,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-08-12 19:20:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:54,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705215964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:54,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:54,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-12 19:20:54,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690944478] [2021-08-12 19:20:54,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:54,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:54,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:54,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:54,651 INFO L87 Difference]: Start difference. First operand 1794 states and 7483 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:55,401 INFO L93 Difference]: Finished difference Result 2603 states and 10344 transitions. [2021-08-12 19:20:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:20:55,401 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:20:55,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:55,410 INFO L225 Difference]: With dead ends: 2603 [2021-08-12 19:20:55,410 INFO L226 Difference]: Without dead ends: 2561 [2021-08-12 19:20:55,411 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 496.3ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:20:55,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2561 states. [2021-08-12 19:20:55,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2561 to 1747. [2021-08-12 19:20:55,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 4.18213058419244) internal successors, (7302), 1746 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:55,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 7302 transitions. [2021-08-12 19:20:55,500 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 7302 transitions. Word has length 29 [2021-08-12 19:20:55,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:55,500 INFO L482 AbstractCegarLoop]: Abstraction has 1747 states and 7302 transitions. [2021-08-12 19:20:55,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:55,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 7302 transitions. [2021-08-12 19:20:55,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:20:55,504 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:55,504 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:55,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:55,761 INFO L430 AbstractCegarLoop]: === Iteration 18 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:55,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:55,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1269743148, now seen corresponding path program 11 times [2021-08-12 19:20:55,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:55,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016411677] [2021-08-12 19:20:55,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:55,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:55,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016411677] [2021-08-12 19:20:55,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016411677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:55,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857404118] [2021-08-12 19:20:55,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:20:55,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:20:55,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:55,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:20:55,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:55,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-12 19:20:55,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:20:55,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:55,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:55,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-08-12 19:20:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:56,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857404118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:56,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:56,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-12 19:20:56,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225480946] [2021-08-12 19:20:56,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:56,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:56,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:56,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:56,096 INFO L87 Difference]: Start difference. First operand 1747 states and 7302 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:56,920 INFO L93 Difference]: Finished difference Result 2162 states and 8943 transitions. [2021-08-12 19:20:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:20:56,920 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:20:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:56,926 INFO L225 Difference]: With dead ends: 2162 [2021-08-12 19:20:56,927 INFO L226 Difference]: Without dead ends: 2145 [2021-08-12 19:20:56,927 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 490.8ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:20:56,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2145 states. [2021-08-12 19:20:57,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2145 to 1744. [2021-08-12 19:20:57,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1744 states, 1743 states have (on average 4.183591508892714) internal successors, (7292), 1743 states have internal predecessors, (7292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:57,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 7292 transitions. [2021-08-12 19:20:57,027 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 7292 transitions. Word has length 29 [2021-08-12 19:20:57,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:57,028 INFO L482 AbstractCegarLoop]: Abstraction has 1744 states and 7292 transitions. [2021-08-12 19:20:57,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:57,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 7292 transitions. [2021-08-12 19:20:57,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:20:57,032 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:57,032 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:57,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-12 19:20:57,245 INFO L430 AbstractCegarLoop]: === Iteration 19 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:57,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:57,245 INFO L82 PathProgramCache]: Analyzing trace with hash 220970746, now seen corresponding path program 12 times [2021-08-12 19:20:57,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:57,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272362251] [2021-08-12 19:20:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:57,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:57,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272362251] [2021-08-12 19:20:57,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272362251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:57,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202404152] [2021-08-12 19:20:57,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:57,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:20:57,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:57,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:20:57,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:57,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:57,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-08-12 19:20:57,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:20:57,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:57,457 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:57,457 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-08-12 19:20:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:57,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202404152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:57,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:57,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-12 19:20:57,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54084958] [2021-08-12 19:20:57,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:57,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:57,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:57,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:57,566 INFO L87 Difference]: Start difference. First operand 1744 states and 7292 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:57,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:57,994 INFO L93 Difference]: Finished difference Result 2259 states and 9219 transitions. [2021-08-12 19:20:57,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:20:57,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:20:57,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:58,000 INFO L225 Difference]: With dead ends: 2259 [2021-08-12 19:20:58,000 INFO L226 Difference]: Without dead ends: 2238 [2021-08-12 19:20:58,000 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:20:58,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2238 states. [2021-08-12 19:20:58,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2238 to 1814. [2021-08-12 19:20:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 4.200220628792057) internal successors, (7615), 1813 states have internal predecessors, (7615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:58,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 7615 transitions. [2021-08-12 19:20:58,068 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 7615 transitions. Word has length 29 [2021-08-12 19:20:58,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:58,068 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 7615 transitions. [2021-08-12 19:20:58,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 7615 transitions. [2021-08-12 19:20:58,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:20:58,072 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:58,073 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:58,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:58,289 INFO L430 AbstractCegarLoop]: === Iteration 20 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:58,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1524243352, now seen corresponding path program 13 times [2021-08-12 19:20:58,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:58,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406986218] [2021-08-12 19:20:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:58,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:58,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406986218] [2021-08-12 19:20:58,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406986218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:58,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014372139] [2021-08-12 19:20:58,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:58,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:20:58,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:58,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-12 19:20:58,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:20:58,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:58,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:58,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-08-12 19:20:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:58,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014372139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:58,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:58,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-12 19:20:58,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737614225] [2021-08-12 19:20:58,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:20:58,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:58,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:20:58,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:20:58,583 INFO L87 Difference]: Start difference. First operand 1814 states and 7615 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:59,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:20:59,354 INFO L93 Difference]: Finished difference Result 2778 states and 11188 transitions. [2021-08-12 19:20:59,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:20:59,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:20:59,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:20:59,361 INFO L225 Difference]: With dead ends: 2778 [2021-08-12 19:20:59,361 INFO L226 Difference]: Without dead ends: 2752 [2021-08-12 19:20:59,362 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 463.7ms TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:20:59,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2752 states. [2021-08-12 19:20:59,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2752 to 1926. [2021-08-12 19:20:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 4.208311688311689) internal successors, (8101), 1925 states have internal predecessors, (8101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:59,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 8101 transitions. [2021-08-12 19:20:59,428 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 8101 transitions. Word has length 29 [2021-08-12 19:20:59,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:20:59,428 INFO L482 AbstractCegarLoop]: Abstraction has 1926 states and 8101 transitions. [2021-08-12 19:20:59,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:20:59,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 8101 transitions. [2021-08-12 19:20:59,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:20:59,431 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:20:59,431 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:20:59,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:20:59,632 INFO L430 AbstractCegarLoop]: === Iteration 21 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:20:59,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:20:59,632 INFO L82 PathProgramCache]: Analyzing trace with hash -144150090, now seen corresponding path program 14 times [2021-08-12 19:20:59,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:20:59,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419119640] [2021-08-12 19:20:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:20:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:20:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:59,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:20:59,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419119640] [2021-08-12 19:20:59,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419119640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:59,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159997673] [2021-08-12 19:20:59,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:20:59,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:20:59,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:20:59,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:20:59,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:20:59,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:59,847 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 [2021-08-12 19:20:59,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:20:59,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:20:59,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:20:59,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:20:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:20:59,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159997673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:20:59,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:20:59,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:20:59,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116518998] [2021-08-12 19:20:59,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:20:59,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:20:59,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:20:59,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:20:59,984 INFO L87 Difference]: Start difference. First operand 1926 states and 8101 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:00,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:00,524 INFO L93 Difference]: Finished difference Result 2336 states and 9591 transitions. [2021-08-12 19:21:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:21:00,524 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:00,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:00,531 INFO L225 Difference]: With dead ends: 2336 [2021-08-12 19:21:00,531 INFO L226 Difference]: Without dead ends: 2320 [2021-08-12 19:21:00,531 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 368.1ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:21:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-08-12 19:21:00,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1919. [2021-08-12 19:21:00,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 4.211157455683003) internal successors, (8077), 1918 states have internal predecessors, (8077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:00,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 8077 transitions. [2021-08-12 19:21:00,596 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 8077 transitions. Word has length 29 [2021-08-12 19:21:00,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:00,596 INFO L482 AbstractCegarLoop]: Abstraction has 1919 states and 8077 transitions. [2021-08-12 19:21:00,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:00,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 8077 transitions. [2021-08-12 19:21:00,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:00,599 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:00,599 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:00,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-12 19:21:00,802 INFO L430 AbstractCegarLoop]: === Iteration 22 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:00,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:00,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1470856832, now seen corresponding path program 15 times [2021-08-12 19:21:00,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:00,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506491230] [2021-08-12 19:21:00,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:00,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:00,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506491230] [2021-08-12 19:21:00,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506491230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:00,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371118753] [2021-08-12 19:21:00,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:00,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:21:00,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:00,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:21:00,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:01,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:01,001 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 [2021-08-12 19:21:01,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:01,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:01,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:01,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-08-12 19:21:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:01,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371118753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:01,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:01,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:01,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133405437] [2021-08-12 19:21:01,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:01,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:01,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:01,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:01,146 INFO L87 Difference]: Start difference. First operand 1919 states and 8077 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:01,661 INFO L93 Difference]: Finished difference Result 2312 states and 9542 transitions. [2021-08-12 19:21:01,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:21:01,661 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:01,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:01,667 INFO L225 Difference]: With dead ends: 2312 [2021-08-12 19:21:01,667 INFO L226 Difference]: Without dead ends: 2287 [2021-08-12 19:21:01,668 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 311.0ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:21:01,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2021-08-12 19:21:01,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 1872. [2021-08-12 19:21:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 4.220203099946553) internal successors, (7896), 1871 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:01,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 7896 transitions. [2021-08-12 19:21:01,731 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 7896 transitions. Word has length 29 [2021-08-12 19:21:01,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:01,731 INFO L482 AbstractCegarLoop]: Abstraction has 1872 states and 7896 transitions. [2021-08-12 19:21:01,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 7896 transitions. [2021-08-12 19:21:01,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:01,734 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:01,734 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:01,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:01,935 INFO L430 AbstractCegarLoop]: === Iteration 23 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:01,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:01,935 INFO L82 PathProgramCache]: Analyzing trace with hash 740203066, now seen corresponding path program 16 times [2021-08-12 19:21:01,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:01,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840025869] [2021-08-12 19:21:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:02,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:02,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840025869] [2021-08-12 19:21:02,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840025869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:02,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028540305] [2021-08-12 19:21:02,054 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 [2021-08-12 19:21:02,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:21:02,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:02,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:02,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:02,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-12 19:21:02,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:02,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:02,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:02,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-08-12 19:21:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:02,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028540305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:02,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:02,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-12 19:21:02,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739450878] [2021-08-12 19:21:02,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:21:02,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:02,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:21:02,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:21:02,243 INFO L87 Difference]: Start difference. First operand 1872 states and 7896 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:03,143 INFO L93 Difference]: Finished difference Result 2326 states and 9666 transitions. [2021-08-12 19:21:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:21:03,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:03,149 INFO L225 Difference]: With dead ends: 2326 [2021-08-12 19:21:03,149 INFO L226 Difference]: Without dead ends: 2305 [2021-08-12 19:21:03,150 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 563.8ms TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:21:03,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2021-08-12 19:21:03,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 1872. [2021-08-12 19:21:03,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1871 states have (on average 4.220203099946553) internal successors, (7896), 1871 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:03,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 7896 transitions. [2021-08-12 19:21:03,215 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 7896 transitions. Word has length 29 [2021-08-12 19:21:03,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:03,215 INFO L482 AbstractCegarLoop]: Abstraction has 1872 states and 7896 transitions. [2021-08-12 19:21:03,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:03,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 7896 transitions. [2021-08-12 19:21:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:03,218 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:03,218 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:03,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 19:21:03,419 INFO L430 AbstractCegarLoop]: === Iteration 24 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:03,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:03,420 INFO L82 PathProgramCache]: Analyzing trace with hash 176605642, now seen corresponding path program 17 times [2021-08-12 19:21:03,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:03,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930389409] [2021-08-12 19:21:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:03,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:03,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930389409] [2021-08-12 19:21:03,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930389409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:03,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876467795] [2021-08-12 19:21:03,528 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 [2021-08-12 19:21:03,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:03,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:03,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:03,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:03,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-12 19:21:03,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:03,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:03,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:03,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-08-12 19:21:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:03,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876467795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:03,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:03,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-12 19:21:03,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616345673] [2021-08-12 19:21:03,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:21:03,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:03,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:21:03,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:21:03,719 INFO L87 Difference]: Start difference. First operand 1872 states and 7896 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:04,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:04,691 INFO L93 Difference]: Finished difference Result 2794 states and 11340 transitions. [2021-08-12 19:21:04,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:21:04,692 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:04,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:04,699 INFO L225 Difference]: With dead ends: 2794 [2021-08-12 19:21:04,699 INFO L226 Difference]: Without dead ends: 2750 [2021-08-12 19:21:04,700 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 612.9ms TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:21:04,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2750 states. [2021-08-12 19:21:04,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2750 to 1860. [2021-08-12 19:21:04,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1860 states, 1859 states have (on average 4.2210866057019905) internal successors, (7847), 1859 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:04,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 7847 transitions. [2021-08-12 19:21:04,792 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 7847 transitions. Word has length 29 [2021-08-12 19:21:04,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:04,792 INFO L482 AbstractCegarLoop]: Abstraction has 1860 states and 7847 transitions. [2021-08-12 19:21:04,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:04,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 7847 transitions. [2021-08-12 19:21:04,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:04,795 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:04,796 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:04,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-12 19:21:04,997 INFO L430 AbstractCegarLoop]: === Iteration 25 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:04,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:04,997 INFO L82 PathProgramCache]: Analyzing trace with hash -81335312, now seen corresponding path program 18 times [2021-08-12 19:21:04,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:04,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381322101] [2021-08-12 19:21:04,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:05,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:05,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:05,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381322101] [2021-08-12 19:21:05,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381322101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:05,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638785739] [2021-08-12 19:21:05,124 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 [2021-08-12 19:21:05,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:21:05,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:05,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:05,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:05,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:05,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:21:05,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:05,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:05,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:05,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-08-12 19:21:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:05,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638785739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:05,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:05,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:05,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742696494] [2021-08-12 19:21:05,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:05,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:05,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:05,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:05,402 INFO L87 Difference]: Start difference. First operand 1860 states and 7847 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:06,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:06,440 INFO L93 Difference]: Finished difference Result 2573 states and 10669 transitions. [2021-08-12 19:21:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:21:06,440 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:06,447 INFO L225 Difference]: With dead ends: 2573 [2021-08-12 19:21:06,447 INFO L226 Difference]: Without dead ends: 2552 [2021-08-12 19:21:06,447 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 668.6ms TimeCoverageRelationStatistics Valid=202, Invalid=988, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:21:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-08-12 19:21:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 1990. [2021-08-12 19:21:06,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1989 states have (on average 4.24534942182001) internal successors, (8444), 1989 states have internal predecessors, (8444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 8444 transitions. [2021-08-12 19:21:06,525 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 8444 transitions. Word has length 29 [2021-08-12 19:21:06,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:06,525 INFO L482 AbstractCegarLoop]: Abstraction has 1990 states and 8444 transitions. [2021-08-12 19:21:06,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:06,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 8444 transitions. [2021-08-12 19:21:06,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:06,528 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:06,528 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:06,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:06,729 INFO L430 AbstractCegarLoop]: === Iteration 26 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:06,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:06,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1221937294, now seen corresponding path program 19 times [2021-08-12 19:21:06,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:06,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203630042] [2021-08-12 19:21:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:06,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:06,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203630042] [2021-08-12 19:21:06,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203630042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:06,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154635991] [2021-08-12 19:21:06,848 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 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 [2021-08-12 19:21:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:06,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:21:06,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:06,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-12 19:21:06,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:06,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:06,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:06,994 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:25 [2021-08-12 19:21:07,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:07,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154635991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:07,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:07,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:07,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192208101] [2021-08-12 19:21:07,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:07,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:07,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:07,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:07,107 INFO L87 Difference]: Start difference. First operand 1990 states and 8444 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:07,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:07,954 INFO L93 Difference]: Finished difference Result 2788 states and 11233 transitions. [2021-08-12 19:21:07,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:21:07,955 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:07,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:07,961 INFO L225 Difference]: With dead ends: 2788 [2021-08-12 19:21:07,961 INFO L226 Difference]: Without dead ends: 2632 [2021-08-12 19:21:07,962 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 435.6ms TimeCoverageRelationStatistics Valid=194, Invalid=736, Unknown=0, NotChecked=0, Total=930 [2021-08-12 19:21:07,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2021-08-12 19:21:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2066. [2021-08-12 19:21:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 4.24455205811138) internal successors, (8765), 2065 states have internal predecessors, (8765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:08,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 8765 transitions. [2021-08-12 19:21:08,073 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 8765 transitions. Word has length 29 [2021-08-12 19:21:08,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:08,073 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 8765 transitions. [2021-08-12 19:21:08,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:08,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 8765 transitions. [2021-08-12 19:21:08,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:08,078 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:08,078 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:08,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-12 19:21:08,293 INFO L430 AbstractCegarLoop]: === Iteration 27 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:08,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:08,293 INFO L82 PathProgramCache]: Analyzing trace with hash -446456148, now seen corresponding path program 20 times [2021-08-12 19:21:08,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:08,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450918783] [2021-08-12 19:21:08,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:08,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:08,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450918783] [2021-08-12 19:21:08,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450918783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:08,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885915210] [2021-08-12 19:21:08,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:08,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:08,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:08,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:08,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:08,506 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:08,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:21:08,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:08,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:08,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:08,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-08-12 19:21:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:08,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885915210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:08,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:08,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:08,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101425338] [2021-08-12 19:21:08,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:08,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:08,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:08,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:08,623 INFO L87 Difference]: Start difference. First operand 2066 states and 8765 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:09,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:09,501 INFO L93 Difference]: Finished difference Result 2518 states and 10451 transitions. [2021-08-12 19:21:09,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:21:09,502 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:09,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:09,510 INFO L225 Difference]: With dead ends: 2518 [2021-08-12 19:21:09,510 INFO L226 Difference]: Without dead ends: 2498 [2021-08-12 19:21:09,511 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:21:09,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2021-08-12 19:21:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2059. [2021-08-12 19:21:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 2058 states have (on average 4.2497570456754135) internal successors, (8746), 2058 states have internal predecessors, (8746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 8746 transitions. [2021-08-12 19:21:09,593 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 8746 transitions. Word has length 29 [2021-08-12 19:21:09,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:09,593 INFO L482 AbstractCegarLoop]: Abstraction has 2059 states and 8746 transitions. [2021-08-12 19:21:09,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:09,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 8746 transitions. [2021-08-12 19:21:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:09,597 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:09,597 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:09,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:09,798 INFO L430 AbstractCegarLoop]: === Iteration 28 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:09,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:09,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1168550774, now seen corresponding path program 21 times [2021-08-12 19:21:09,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:09,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345826989] [2021-08-12 19:21:09,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:09,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:09,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345826989] [2021-08-12 19:21:09,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345826989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:09,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364257378] [2021-08-12 19:21:09,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:09,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:21:09,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:09,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:09,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:10,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:10,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:21:10,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:10,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:10,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:10,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-08-12 19:21:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:10,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364257378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:10,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:10,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:10,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068556420] [2021-08-12 19:21:10,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:10,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:10,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:10,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:10,195 INFO L87 Difference]: Start difference. First operand 2059 states and 8746 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:11,140 INFO L93 Difference]: Finished difference Result 2527 states and 10481 transitions. [2021-08-12 19:21:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:21:11,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:11,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:11,148 INFO L225 Difference]: With dead ends: 2527 [2021-08-12 19:21:11,148 INFO L226 Difference]: Without dead ends: 2486 [2021-08-12 19:21:11,149 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 593.8ms TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:21:11,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-08-12 19:21:11,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2034. [2021-08-12 19:21:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 4.254795868175111) internal successors, (8650), 2033 states have internal predecessors, (8650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 8650 transitions. [2021-08-12 19:21:11,262 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 8650 transitions. Word has length 29 [2021-08-12 19:21:11,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:11,262 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 8650 transitions. [2021-08-12 19:21:11,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:11,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 8650 transitions. [2021-08-12 19:21:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:11,265 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:11,265 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:11,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-12 19:21:11,466 INFO L430 AbstractCegarLoop]: === Iteration 29 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:11,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:11,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1063587426, now seen corresponding path program 22 times [2021-08-12 19:21:11,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:11,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418167978] [2021-08-12 19:21:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:11,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:11,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:11,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418167978] [2021-08-12 19:21:11,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418167978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:11,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79675378] [2021-08-12 19:21:11,581 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 [2021-08-12 19:21:11,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:21:11,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:11,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:21:11,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:11,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-12 19:21:11,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:11,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:11,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:11,722 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:25 [2021-08-12 19:21:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:11,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79675378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:11,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:11,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:11,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366197068] [2021-08-12 19:21:11,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:11,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:11,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:11,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:11,877 INFO L87 Difference]: Start difference. First operand 2034 states and 8650 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:12,759 INFO L93 Difference]: Finished difference Result 2467 states and 10241 transitions. [2021-08-12 19:21:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:21:12,760 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:12,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:12,768 INFO L225 Difference]: With dead ends: 2467 [2021-08-12 19:21:12,768 INFO L226 Difference]: Without dead ends: 2369 [2021-08-12 19:21:12,770 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 567.2ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:21:12,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-08-12 19:21:12,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 2037. [2021-08-12 19:21:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2037 states, 2036 states have (on average 4.251473477406679) internal successors, (8656), 2036 states have internal predecessors, (8656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2037 states to 2037 states and 8656 transitions. [2021-08-12 19:21:12,860 INFO L78 Accepts]: Start accepts. Automaton has 2037 states and 8656 transitions. Word has length 29 [2021-08-12 19:21:12,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:12,860 INFO L482 AbstractCegarLoop]: Abstraction has 2037 states and 8656 transitions. [2021-08-12 19:21:12,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:12,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2037 states and 8656 transitions. [2021-08-12 19:21:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:12,863 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:12,863 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:13,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 19:21:13,064 INFO L430 AbstractCegarLoop]: === Iteration 30 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:13,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1021005372, now seen corresponding path program 23 times [2021-08-12 19:21:13,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:13,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955000093] [2021-08-12 19:21:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:13,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:13,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955000093] [2021-08-12 19:21:13,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955000093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:13,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135160148] [2021-08-12 19:21:13,195 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 [2021-08-12 19:21:13,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:13,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:13,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-12 19:21:13,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:13,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2021-08-12 19:21:13,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:13,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:13,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:13,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:20 [2021-08-12 19:21:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:13,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135160148] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:13,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:13,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-12 19:21:13,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562509472] [2021-08-12 19:21:13,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:21:13,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:13,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:21:13,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:21:13,448 INFO L87 Difference]: Start difference. First operand 2037 states and 8656 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:14,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:14,059 INFO L93 Difference]: Finished difference Result 2474 states and 10299 transitions. [2021-08-12 19:21:14,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:21:14,060 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:14,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:14,066 INFO L225 Difference]: With dead ends: 2474 [2021-08-12 19:21:14,066 INFO L226 Difference]: Without dead ends: 2458 [2021-08-12 19:21:14,067 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 385.7ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:21:14,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-08-12 19:21:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2027. [2021-08-12 19:21:14,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 4.25715695952616) internal successors, (8625), 2026 states have internal predecessors, (8625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:14,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 8625 transitions. [2021-08-12 19:21:14,184 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 8625 transitions. Word has length 29 [2021-08-12 19:21:14,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:14,185 INFO L482 AbstractCegarLoop]: Abstraction has 2027 states and 8625 transitions. [2021-08-12 19:21:14,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 8625 transitions. [2021-08-12 19:21:14,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:14,188 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:14,188 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:14,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:14,389 INFO L430 AbstractCegarLoop]: === Iteration 31 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:14,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:14,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1011868340, now seen corresponding path program 24 times [2021-08-12 19:21:14,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:14,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719031585] [2021-08-12 19:21:14,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:14,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:14,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:14,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719031585] [2021-08-12 19:21:14,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719031585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:14,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3694464] [2021-08-12 19:21:14,520 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 [2021-08-12 19:21:14,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:21:14,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:14,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:14,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:14,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:14,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-08-12 19:21:14,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:14,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:14,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:14,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-08-12 19:21:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:14,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3694464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:14,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:14,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:14,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643608313] [2021-08-12 19:21:14,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:14,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:14,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:14,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:14,784 INFO L87 Difference]: Start difference. First operand 2027 states and 8625 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:15,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:15,428 INFO L93 Difference]: Finished difference Result 2234 states and 9406 transitions. [2021-08-12 19:21:15,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:21:15,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:15,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:15,435 INFO L225 Difference]: With dead ends: 2234 [2021-08-12 19:21:15,435 INFO L226 Difference]: Without dead ends: 2217 [2021-08-12 19:21:15,436 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 439.1ms TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:21:15,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2021-08-12 19:21:15,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2039. [2021-08-12 19:21:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2039 states, 2038 states have (on average 4.247791952894995) internal successors, (8657), 2038 states have internal predecessors, (8657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:15,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2039 states to 2039 states and 8657 transitions. [2021-08-12 19:21:15,542 INFO L78 Accepts]: Start accepts. Automaton has 2039 states and 8657 transitions. Word has length 29 [2021-08-12 19:21:15,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:15,542 INFO L482 AbstractCegarLoop]: Abstraction has 2039 states and 8657 transitions. [2021-08-12 19:21:15,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:15,542 INFO L276 IsEmpty]: Start isEmpty. Operand 2039 states and 8657 transitions. [2021-08-12 19:21:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:15,545 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:15,545 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:15,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:15,749 INFO L430 AbstractCegarLoop]: === Iteration 32 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:15,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:15,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1867952308, now seen corresponding path program 25 times [2021-08-12 19:21:15,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:15,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441536330] [2021-08-12 19:21:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:15,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:15,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441536330] [2021-08-12 19:21:15,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441536330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:15,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782217181] [2021-08-12 19:21:15,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:15,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:21:15,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:15,984 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 [2021-08-12 19:21:15,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:15,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:15,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:15,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-08-12 19:21:16,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:16,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782217181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:16,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:16,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:16,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950011886] [2021-08-12 19:21:16,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:16,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:16,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:16,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:16,117 INFO L87 Difference]: Start difference. First operand 2039 states and 8657 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:17,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:17,451 INFO L93 Difference]: Finished difference Result 3255 states and 13236 transitions. [2021-08-12 19:21:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 19:21:17,452 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:17,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:17,460 INFO L225 Difference]: With dead ends: 3255 [2021-08-12 19:21:17,460 INFO L226 Difference]: Without dead ends: 3099 [2021-08-12 19:21:17,461 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 740.1ms TimeCoverageRelationStatistics Valid=348, Invalid=1458, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:21:17,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2021-08-12 19:21:17,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 2218. [2021-08-12 19:21:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 4.256202074875959) internal successors, (9436), 2217 states have internal predecessors, (9436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:17,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 9436 transitions. [2021-08-12 19:21:17,561 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 9436 transitions. Word has length 29 [2021-08-12 19:21:17,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:17,561 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 9436 transitions. [2021-08-12 19:21:17,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:17,561 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 9436 transitions. [2021-08-12 19:21:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:17,565 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:17,565 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:17,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-12 19:21:17,766 INFO L430 AbstractCegarLoop]: === Iteration 33 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:17,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:17,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1123742382, now seen corresponding path program 26 times [2021-08-12 19:21:17,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:17,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057177608] [2021-08-12 19:21:17,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:17,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:17,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057177608] [2021-08-12 19:21:17,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057177608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:17,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975798996] [2021-08-12 19:21:17,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:17,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:17,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:17,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:17,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:18,005 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:18,005 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 [2021-08-12 19:21:18,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:18,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:18,015 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:18,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:21:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:18,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975798996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:18,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:18,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:18,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852190966] [2021-08-12 19:21:18,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:18,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:18,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:18,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:18,148 INFO L87 Difference]: Start difference. First operand 2218 states and 9436 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:19,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:19,143 INFO L93 Difference]: Finished difference Result 2625 states and 10954 transitions. [2021-08-12 19:21:19,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:21:19,144 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:19,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:19,151 INFO L225 Difference]: With dead ends: 2625 [2021-08-12 19:21:19,151 INFO L226 Difference]: Without dead ends: 2606 [2021-08-12 19:21:19,152 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 637.7ms TimeCoverageRelationStatistics Valid=268, Invalid=922, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:21:19,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2606 states. [2021-08-12 19:21:19,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2606 to 2211. [2021-08-12 19:21:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2210 states have (on average 4.261085972850679) internal successors, (9417), 2210 states have internal predecessors, (9417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 9417 transitions. [2021-08-12 19:21:19,259 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 9417 transitions. Word has length 29 [2021-08-12 19:21:19,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:19,259 INFO L482 AbstractCegarLoop]: Abstraction has 2211 states and 9417 transitions. [2021-08-12 19:21:19,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:19,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 9417 transitions. [2021-08-12 19:21:19,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:19,263 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:19,263 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:19,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:19,463 INFO L430 AbstractCegarLoop]: === Iteration 34 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:19,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:19,464 INFO L82 PathProgramCache]: Analyzing trace with hash -2023104454, now seen corresponding path program 27 times [2021-08-12 19:21:19,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:19,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113056672] [2021-08-12 19:21:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:19,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:19,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113056672] [2021-08-12 19:21:19,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113056672] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:19,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062093770] [2021-08-12 19:21:19,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:21:19,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:21:19,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:19,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:19,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:19,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:19,696 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 [2021-08-12 19:21:19,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:19,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:19,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:19,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:21:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:19,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062093770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:19,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:19,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:19,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373142158] [2021-08-12 19:21:19,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:19,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:19,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:19,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:19,849 INFO L87 Difference]: Start difference. First operand 2211 states and 9417 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:21,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:21,014 INFO L93 Difference]: Finished difference Result 2752 states and 11454 transitions. [2021-08-12 19:21:21,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:21:21,014 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:21,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:21,021 INFO L225 Difference]: With dead ends: 2752 [2021-08-12 19:21:21,022 INFO L226 Difference]: Without dead ends: 2727 [2021-08-12 19:21:21,022 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 769.1ms TimeCoverageRelationStatistics Valid=275, Invalid=1131, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:21:21,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2021-08-12 19:21:21,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2206. [2021-08-12 19:21:21,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2206 states, 2205 states have (on average 4.263038548752834) internal successors, (9400), 2205 states have internal predecessors, (9400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:21,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2206 states to 2206 states and 9400 transitions. [2021-08-12 19:21:21,141 INFO L78 Accepts]: Start accepts. Automaton has 2206 states and 9400 transitions. Word has length 29 [2021-08-12 19:21:21,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:21,142 INFO L482 AbstractCegarLoop]: Abstraction has 2206 states and 9400 transitions. [2021-08-12 19:21:21,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:21,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2206 states and 9400 transitions. [2021-08-12 19:21:21,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:21,145 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:21,145 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:21,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-12 19:21:21,346 INFO L430 AbstractCegarLoop]: === Iteration 35 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:21,346 INFO L82 PathProgramCache]: Analyzing trace with hash 491264540, now seen corresponding path program 28 times [2021-08-12 19:21:21,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:21,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463266653] [2021-08-12 19:21:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:21,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:21,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463266653] [2021-08-12 19:21:21,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463266653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:21,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10947122] [2021-08-12 19:21:21,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:21,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:21:21,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:21,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:21:21,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:21,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-08-12 19:21:21,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:21,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:21,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:21,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-08-12 19:21:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:21,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10947122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:21,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:21,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:21,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660057543] [2021-08-12 19:21:21,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:21,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:21,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:21,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:21,669 INFO L87 Difference]: Start difference. First operand 2206 states and 9400 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:22,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:22,652 INFO L93 Difference]: Finished difference Result 2860 states and 11703 transitions. [2021-08-12 19:21:22,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:21:22,652 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:22,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:22,660 INFO L225 Difference]: With dead ends: 2860 [2021-08-12 19:21:22,660 INFO L226 Difference]: Without dead ends: 2802 [2021-08-12 19:21:22,660 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:21:22,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2802 states. [2021-08-12 19:21:22,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2802 to 2142. [2021-08-12 19:21:22,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2141 states have (on average 4.280709948622139) internal successors, (9165), 2141 states have internal predecessors, (9165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:22,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 9165 transitions. [2021-08-12 19:21:22,760 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 9165 transitions. Word has length 29 [2021-08-12 19:21:22,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:22,761 INFO L482 AbstractCegarLoop]: Abstraction has 2142 states and 9165 transitions. [2021-08-12 19:21:22,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:22,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 9165 transitions. [2021-08-12 19:21:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:22,764 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:22,764 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:22,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-12 19:21:22,965 INFO L430 AbstractCegarLoop]: === Iteration 36 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:22,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:22,965 INFO L82 PathProgramCache]: Analyzing trace with hash 885700194, now seen corresponding path program 29 times [2021-08-12 19:21:22,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:22,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154273781] [2021-08-12 19:21:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:23,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:23,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:23,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154273781] [2021-08-12 19:21:23,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154273781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:23,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761367917] [2021-08-12 19:21:23,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:23,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:23,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:23,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:23,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:23,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-12 19:21:23,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:23,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:23,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:23,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-08-12 19:21:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:23,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761367917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:23,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:23,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-12 19:21:23,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002528389] [2021-08-12 19:21:23,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:21:23,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:23,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:21:23,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:21:23,264 INFO L87 Difference]: Start difference. First operand 2142 states and 9165 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:24,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:24,133 INFO L93 Difference]: Finished difference Result 2440 states and 10310 transitions. [2021-08-12 19:21:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:21:24,133 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:24,141 INFO L225 Difference]: With dead ends: 2440 [2021-08-12 19:21:24,141 INFO L226 Difference]: Without dead ends: 2423 [2021-08-12 19:21:24,141 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 527.6ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:21:24,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-08-12 19:21:24,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2139. [2021-08-12 19:21:24,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2139 states, 2138 states have (on average 4.2820392890551915) internal successors, (9155), 2138 states have internal predecessors, (9155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2139 states to 2139 states and 9155 transitions. [2021-08-12 19:21:24,252 INFO L78 Accepts]: Start accepts. Automaton has 2139 states and 9155 transitions. Word has length 29 [2021-08-12 19:21:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:24,253 INFO L482 AbstractCegarLoop]: Abstraction has 2139 states and 9155 transitions. [2021-08-12 19:21:24,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2139 states and 9155 transitions. [2021-08-12 19:21:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:24,257 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:24,258 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:24,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-12 19:21:24,469 INFO L430 AbstractCegarLoop]: === Iteration 37 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:24,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:24,469 INFO L82 PathProgramCache]: Analyzing trace with hash -163072208, now seen corresponding path program 30 times [2021-08-12 19:21:24,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:24,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644909619] [2021-08-12 19:21:24,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:24,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:24,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:24,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644909619] [2021-08-12 19:21:24,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644909619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:24,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238606463] [2021-08-12 19:21:24,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:24,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:21:24,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:24,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:24,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:24,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:24,685 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 [2021-08-12 19:21:24,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:24,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:24,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:24,697 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:21:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:24,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238606463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:24,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:24,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:24,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021077682] [2021-08-12 19:21:24,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:24,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:24,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:24,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:24,831 INFO L87 Difference]: Start difference. First operand 2139 states and 9155 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:25,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:25,991 INFO L93 Difference]: Finished difference Result 2818 states and 11724 transitions. [2021-08-12 19:21:25,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:21:25,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:25,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:25,999 INFO L225 Difference]: With dead ends: 2818 [2021-08-12 19:21:25,999 INFO L226 Difference]: Without dead ends: 2797 [2021-08-12 19:21:25,999 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 707.4ms TimeCoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:21:26,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2797 states. [2021-08-12 19:21:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2797 to 2209. [2021-08-12 19:21:26,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 2208 states have (on average 4.291213768115942) internal successors, (9475), 2208 states have internal predecessors, (9475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 9475 transitions. [2021-08-12 19:21:26,103 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 9475 transitions. Word has length 29 [2021-08-12 19:21:26,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:26,104 INFO L482 AbstractCegarLoop]: Abstraction has 2209 states and 9475 transitions. [2021-08-12 19:21:26,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:26,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 9475 transitions. [2021-08-12 19:21:26,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:26,107 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:26,107 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:26,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-12 19:21:26,308 INFO L430 AbstractCegarLoop]: === Iteration 38 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:26,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:26,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1140200398, now seen corresponding path program 31 times [2021-08-12 19:21:26,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:26,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500859468] [2021-08-12 19:21:26,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:26,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:26,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500859468] [2021-08-12 19:21:26,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500859468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:26,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848564182] [2021-08-12 19:21:26,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:21:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:26,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:21:26,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:26,549 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 [2021-08-12 19:21:26,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:26,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:26,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:26,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-08-12 19:21:26,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:26,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848564182] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:26,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:26,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:26,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593226292] [2021-08-12 19:21:26,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:26,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:26,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:26,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:26,702 INFO L87 Difference]: Start difference. First operand 2209 states and 9475 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:27,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:27,847 INFO L93 Difference]: Finished difference Result 3139 states and 12768 transitions. [2021-08-12 19:21:27,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:21:27,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:27,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:27,855 INFO L225 Difference]: With dead ends: 3139 [2021-08-12 19:21:27,855 INFO L226 Difference]: Without dead ends: 2989 [2021-08-12 19:21:27,856 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 557.4ms TimeCoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 19:21:27,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2021-08-12 19:21:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2226. [2021-08-12 19:21:27,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 4.273707865168539) internal successors, (9509), 2225 states have internal predecessors, (9509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:27,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 9509 transitions. [2021-08-12 19:21:27,976 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 9509 transitions. Word has length 29 [2021-08-12 19:21:27,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:27,976 INFO L482 AbstractCegarLoop]: Abstraction has 2226 states and 9509 transitions. [2021-08-12 19:21:27,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:27,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 9509 transitions. [2021-08-12 19:21:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:27,980 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:27,980 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:28,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-12 19:21:28,182 INFO L430 AbstractCegarLoop]: === Iteration 39 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:28,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:28,182 INFO L82 PathProgramCache]: Analyzing trace with hash -528193044, now seen corresponding path program 32 times [2021-08-12 19:21:28,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:28,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709274106] [2021-08-12 19:21:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:28,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:28,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709274106] [2021-08-12 19:21:28,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709274106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:28,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185724335] [2021-08-12 19:21:28,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:28,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:28,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:28,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:28,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:28,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:28,367 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-12 19:21:28,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:28,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:28,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:28,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:21:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:28,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185724335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:28,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:28,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:28,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949476281] [2021-08-12 19:21:28,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:28,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:28,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:28,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:28,506 INFO L87 Difference]: Start difference. First operand 2226 states and 9509 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:29,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:29,473 INFO L93 Difference]: Finished difference Result 2677 states and 11140 transitions. [2021-08-12 19:21:29,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:21:29,473 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:29,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:29,480 INFO L225 Difference]: With dead ends: 2677 [2021-08-12 19:21:29,480 INFO L226 Difference]: Without dead ends: 2657 [2021-08-12 19:21:29,481 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 572.7ms TimeCoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:21:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-08-12 19:21:29,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2219. [2021-08-12 19:21:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 2218 states have (on average 4.278629395852119) internal successors, (9490), 2218 states have internal predecessors, (9490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 9490 transitions. [2021-08-12 19:21:29,588 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 9490 transitions. Word has length 29 [2021-08-12 19:21:29,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:29,588 INFO L482 AbstractCegarLoop]: Abstraction has 2219 states and 9490 transitions. [2021-08-12 19:21:29,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:29,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 9490 transitions. [2021-08-12 19:21:29,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:29,592 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:29,592 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:29,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-12 19:21:29,793 INFO L430 AbstractCegarLoop]: === Iteration 40 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:29,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:29,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1086813878, now seen corresponding path program 33 times [2021-08-12 19:21:29,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:29,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446650359] [2021-08-12 19:21:29,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:29,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:29,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:29,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446650359] [2021-08-12 19:21:29,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446650359] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:29,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238142242] [2021-08-12 19:21:29,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:29,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:21:29,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:29,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:29,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:30,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:30,022 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 [2021-08-12 19:21:30,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:30,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:30,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:30,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:21:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:30,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238142242] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:30,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:30,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:30,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503249889] [2021-08-12 19:21:30,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:30,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:30,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:30,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:30,187 INFO L87 Difference]: Start difference. First operand 2219 states and 9490 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:31,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:31,206 INFO L93 Difference]: Finished difference Result 2649 states and 11083 transitions. [2021-08-12 19:21:31,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 19:21:31,206 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:31,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:31,213 INFO L225 Difference]: With dead ends: 2649 [2021-08-12 19:21:31,214 INFO L226 Difference]: Without dead ends: 2608 [2021-08-12 19:21:31,214 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 658.6ms TimeCoverageRelationStatistics Valid=254, Invalid=1006, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:21:31,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-08-12 19:21:31,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 2163. [2021-08-12 19:21:31,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.279833487511564) internal successors, (9253), 2162 states have internal predecessors, (9253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:31,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 9253 transitions. [2021-08-12 19:21:31,341 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 9253 transitions. Word has length 29 [2021-08-12 19:21:31,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:31,342 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 9253 transitions. [2021-08-12 19:21:31,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:31,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 9253 transitions. [2021-08-12 19:21:31,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:31,346 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:31,346 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:31,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-12 19:21:31,558 INFO L430 AbstractCegarLoop]: === Iteration 41 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:31,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:31,559 INFO L82 PathProgramCache]: Analyzing trace with hash 356160112, now seen corresponding path program 34 times [2021-08-12 19:21:31,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:31,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279061791] [2021-08-12 19:21:31,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:31,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:31,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279061791] [2021-08-12 19:21:31,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279061791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:31,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831421214] [2021-08-12 19:21:31,675 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 [2021-08-12 19:21:31,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:21:31,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:31,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:21:31,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:31,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:21:31,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:31,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:31,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:31,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:26 [2021-08-12 19:21:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:31,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831421214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:31,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:31,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:31,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399141968] [2021-08-12 19:21:31,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:31,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:31,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:31,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:31,917 INFO L87 Difference]: Start difference. First operand 2163 states and 9253 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:33,074 INFO L93 Difference]: Finished difference Result 2802 states and 11720 transitions. [2021-08-12 19:21:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 19:21:33,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:33,082 INFO L225 Difference]: With dead ends: 2802 [2021-08-12 19:21:33,082 INFO L226 Difference]: Without dead ends: 2695 [2021-08-12 19:21:33,083 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 621.4ms TimeCoverageRelationStatistics Valid=212, Invalid=1120, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 19:21:33,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-08-12 19:21:33,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2163. [2021-08-12 19:21:33,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.277983348751157) internal successors, (9249), 2162 states have internal predecessors, (9249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:33,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 9249 transitions. [2021-08-12 19:21:33,218 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 9249 transitions. Word has length 29 [2021-08-12 19:21:33,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:33,218 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 9249 transitions. [2021-08-12 19:21:33,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:33,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 9249 transitions. [2021-08-12 19:21:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:33,222 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:33,222 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:33,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:33,423 INFO L430 AbstractCegarLoop]: === Iteration 42 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:33,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:33,424 INFO L82 PathProgramCache]: Analyzing trace with hash -207437312, now seen corresponding path program 35 times [2021-08-12 19:21:33,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:33,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480720745] [2021-08-12 19:21:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:33,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:33,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480720745] [2021-08-12 19:21:33,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480720745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:33,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885445940] [2021-08-12 19:21:33,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:33,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:21:33,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:33,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:33,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:33,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-12 19:21:33,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:33,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:33,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:33,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-08-12 19:21:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:33,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885445940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:33,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:33,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-12 19:21:33,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019199462] [2021-08-12 19:21:33,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:21:33,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:33,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:21:33,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:21:33,743 INFO L87 Difference]: Start difference. First operand 2163 states and 9249 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:34,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:34,690 INFO L93 Difference]: Finished difference Result 2790 states and 11739 transitions. [2021-08-12 19:21:34,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:21:34,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:34,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:34,698 INFO L225 Difference]: With dead ends: 2790 [2021-08-12 19:21:34,698 INFO L226 Difference]: Without dead ends: 2765 [2021-08-12 19:21:34,699 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 460.6ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:21:34,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2765 states. [2021-08-12 19:21:34,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2765 to 2163. [2021-08-12 19:21:34,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.277983348751157) internal successors, (9249), 2162 states have internal predecessors, (9249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 9249 transitions. [2021-08-12 19:21:34,812 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 9249 transitions. Word has length 29 [2021-08-12 19:21:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:34,812 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 9249 transitions. [2021-08-12 19:21:34,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 9249 transitions. [2021-08-12 19:21:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:34,815 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:34,815 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:35,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:35,016 INFO L430 AbstractCegarLoop]: === Iteration 43 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:35,016 INFO L82 PathProgramCache]: Analyzing trace with hash 828150992, now seen corresponding path program 1 times [2021-08-12 19:21:35,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:35,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590506563] [2021-08-12 19:21:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:35,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:35,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590506563] [2021-08-12 19:21:35,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590506563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:35,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223403278] [2021-08-12 19:21:35,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:35,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:35,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:35,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:21:35,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:35,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:35,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:35,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-08-12 19:21:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:35,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223403278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:35,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:35,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-12 19:21:35,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616641698] [2021-08-12 19:21:35,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:21:35,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:35,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:21:35,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:21:35,407 INFO L87 Difference]: Start difference. First operand 2163 states and 9249 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:36,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:36,110 INFO L93 Difference]: Finished difference Result 2920 states and 12255 transitions. [2021-08-12 19:21:36,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:21:36,111 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:36,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:36,119 INFO L225 Difference]: With dead ends: 2920 [2021-08-12 19:21:36,119 INFO L226 Difference]: Without dead ends: 2899 [2021-08-12 19:21:36,119 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:21:36,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-08-12 19:21:36,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2351. [2021-08-12 19:21:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 4.279148936170213) internal successors, (10056), 2350 states have internal predecessors, (10056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 10056 transitions. [2021-08-12 19:21:36,244 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 10056 transitions. Word has length 29 [2021-08-12 19:21:36,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:36,244 INFO L482 AbstractCegarLoop]: Abstraction has 2351 states and 10056 transitions. [2021-08-12 19:21:36,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:36,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 10056 transitions. [2021-08-12 19:21:36,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:36,248 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:36,248 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:36,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:36,449 INFO L430 AbstractCegarLoop]: === Iteration 44 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:36,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:36,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2044461478, now seen corresponding path program 2 times [2021-08-12 19:21:36,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:36,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777548323] [2021-08-12 19:21:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:36,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:36,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777548323] [2021-08-12 19:21:36,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777548323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:36,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929476877] [2021-08-12 19:21:36,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:36,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:36,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:36,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:36,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:36,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:36,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:21:36,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:36,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:36,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:36,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-08-12 19:21:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:36,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929476877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:36,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:36,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:36,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799997276] [2021-08-12 19:21:36,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:36,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:36,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:36,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:36,922 INFO L87 Difference]: Start difference. First operand 2351 states and 10056 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:37,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:37,785 INFO L93 Difference]: Finished difference Result 2784 states and 11688 transitions. [2021-08-12 19:21:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:21:37,786 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:37,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:37,794 INFO L225 Difference]: With dead ends: 2784 [2021-08-12 19:21:37,794 INFO L226 Difference]: Without dead ends: 2769 [2021-08-12 19:21:37,795 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 540.6ms TimeCoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:21:37,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2021-08-12 19:21:37,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 2342. [2021-08-12 19:21:37,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 2341 states have (on average 4.282785134557881) internal successors, (10026), 2341 states have internal predecessors, (10026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:37,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 10026 transitions. [2021-08-12 19:21:37,962 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 10026 transitions. Word has length 29 [2021-08-12 19:21:37,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:37,962 INFO L482 AbstractCegarLoop]: Abstraction has 2342 states and 10026 transitions. [2021-08-12 19:21:37,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 10026 transitions. [2021-08-12 19:21:37,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:37,965 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:37,965 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:38,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-12 19:21:38,166 INFO L430 AbstractCegarLoop]: === Iteration 45 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:38,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1805403798, now seen corresponding path program 3 times [2021-08-12 19:21:38,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:38,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883626580] [2021-08-12 19:21:38,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:38,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:38,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883626580] [2021-08-12 19:21:38,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883626580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:38,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094006462] [2021-08-12 19:21:38,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:38,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:21:38,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:38,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:38,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:38,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:38,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:21:38,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:38,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:38,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:38,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-08-12 19:21:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:38,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094006462] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:38,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:38,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:38,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102776271] [2021-08-12 19:21:38,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:38,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:38,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:38,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:38,635 INFO L87 Difference]: Start difference. First operand 2342 states and 10026 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:39,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:39,828 INFO L93 Difference]: Finished difference Result 2797 states and 11677 transitions. [2021-08-12 19:21:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:21:39,828 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:39,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:39,836 INFO L225 Difference]: With dead ends: 2797 [2021-08-12 19:21:39,836 INFO L226 Difference]: Without dead ends: 2780 [2021-08-12 19:21:39,837 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 744.7ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:21:39,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2780 states. [2021-08-12 19:21:39,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2780 to 2349. [2021-08-12 19:21:39,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 4.2789608177172065) internal successors, (10047), 2348 states have internal predecessors, (10047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:39,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 10047 transitions. [2021-08-12 19:21:39,988 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 10047 transitions. Word has length 29 [2021-08-12 19:21:39,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:39,988 INFO L482 AbstractCegarLoop]: Abstraction has 2349 states and 10047 transitions. [2021-08-12 19:21:39,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 10047 transitions. [2021-08-12 19:21:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:39,992 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:39,992 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:40,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:40,194 INFO L430 AbstractCegarLoop]: === Iteration 46 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:40,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:40,195 INFO L82 PathProgramCache]: Analyzing trace with hash 24805496, now seen corresponding path program 4 times [2021-08-12 19:21:40,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:40,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943541174] [2021-08-12 19:21:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:40,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:40,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943541174] [2021-08-12 19:21:40,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943541174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:40,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995820130] [2021-08-12 19:21:40,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:40,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:21:40,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:40,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:40,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:40,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:21:40,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:40,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:40,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:40,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-08-12 19:21:40,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:40,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995820130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:40,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:40,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-12 19:21:40,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936260591] [2021-08-12 19:21:40,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:21:40,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:40,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:21:40,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:21:40,574 INFO L87 Difference]: Start difference. First operand 2349 states and 10047 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:41,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:41,282 INFO L93 Difference]: Finished difference Result 2948 states and 12324 transitions. [2021-08-12 19:21:41,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:21:41,283 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:41,291 INFO L225 Difference]: With dead ends: 2948 [2021-08-12 19:21:41,291 INFO L226 Difference]: Without dead ends: 2915 [2021-08-12 19:21:41,291 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 277.3ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2021-08-12 19:21:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 2313. [2021-08-12 19:21:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 4.285899653979238) internal successors, (9909), 2312 states have internal predecessors, (9909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 9909 transitions. [2021-08-12 19:21:41,419 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 9909 transitions. Word has length 29 [2021-08-12 19:21:41,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:41,419 INFO L482 AbstractCegarLoop]: Abstraction has 2313 states and 9909 transitions. [2021-08-12 19:21:41,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:41,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 9909 transitions. [2021-08-12 19:21:41,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:41,423 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:41,423 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:41,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:41,623 INFO L430 AbstractCegarLoop]: === Iteration 47 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:41,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:41,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2005583254, now seen corresponding path program 5 times [2021-08-12 19:21:41,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:41,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932393487] [2021-08-12 19:21:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:41,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:41,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932393487] [2021-08-12 19:21:41,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932393487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:41,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757263108] [2021-08-12 19:21:41,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:41,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:41,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:41,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:21:41,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:41,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-08-12 19:21:41,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:41,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:41,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:41,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:12 [2021-08-12 19:21:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:41,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757263108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:41,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:41,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-12 19:21:41,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129309531] [2021-08-12 19:21:41,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:21:41,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:41,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:21:41,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:21:41,987 INFO L87 Difference]: Start difference. First operand 2313 states and 9909 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:42,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:42,692 INFO L93 Difference]: Finished difference Result 2527 states and 10684 transitions. [2021-08-12 19:21:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:21:42,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:42,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:42,701 INFO L225 Difference]: With dead ends: 2527 [2021-08-12 19:21:42,701 INFO L226 Difference]: Without dead ends: 2510 [2021-08-12 19:21:42,701 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 327.0ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:21:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2510 states. [2021-08-12 19:21:42,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2510 to 2301. [2021-08-12 19:21:42,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2301 states, 2300 states have (on average 4.288260869565217) internal successors, (9863), 2300 states have internal predecessors, (9863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:42,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2301 states to 2301 states and 9863 transitions. [2021-08-12 19:21:42,827 INFO L78 Accepts]: Start accepts. Automaton has 2301 states and 9863 transitions. Word has length 29 [2021-08-12 19:21:42,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:42,827 INFO L482 AbstractCegarLoop]: Abstraction has 2301 states and 9863 transitions. [2021-08-12 19:21:42,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2301 states and 9863 transitions. [2021-08-12 19:21:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:42,830 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:42,830 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:43,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-12 19:21:43,031 INFO L430 AbstractCegarLoop]: === Iteration 48 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:43,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:43,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1642415852, now seen corresponding path program 6 times [2021-08-12 19:21:43,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:43,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469788611] [2021-08-12 19:21:43,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:43,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:43,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469788611] [2021-08-12 19:21:43,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469788611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:43,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068398113] [2021-08-12 19:21:43,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:43,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:21:43,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:43,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:43,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:43,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:43,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-08-12 19:21:43,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:43,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:43,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:43,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-08-12 19:21:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:43,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068398113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:43,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:43,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:43,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984452865] [2021-08-12 19:21:43,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:43,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:43,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:43,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:43,483 INFO L87 Difference]: Start difference. First operand 2301 states and 9863 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:44,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:44,283 INFO L93 Difference]: Finished difference Result 2397 states and 10167 transitions. [2021-08-12 19:21:44,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:21:44,283 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:44,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:44,290 INFO L225 Difference]: With dead ends: 2397 [2021-08-12 19:21:44,290 INFO L226 Difference]: Without dead ends: 2380 [2021-08-12 19:21:44,291 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 516.4ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:21:44,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-08-12 19:21:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2295. [2021-08-12 19:21:44,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2294 states have (on average 4.291194420226678) internal successors, (9844), 2294 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:44,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 9844 transitions. [2021-08-12 19:21:44,419 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 9844 transitions. Word has length 29 [2021-08-12 19:21:44,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:44,419 INFO L482 AbstractCegarLoop]: Abstraction has 2295 states and 9844 transitions. [2021-08-12 19:21:44,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:44,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 9844 transitions. [2021-08-12 19:21:44,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:44,423 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:44,423 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:44,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-12 19:21:44,623 INFO L430 AbstractCegarLoop]: === Iteration 49 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:44,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:44,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1042410156, now seen corresponding path program 7 times [2021-08-12 19:21:44,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:44,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787788187] [2021-08-12 19:21:44,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:44,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:44,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787788187] [2021-08-12 19:21:44,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787788187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:44,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824962457] [2021-08-12 19:21:44,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:21:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:44,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:44,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:44,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:21:44,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:44,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:44,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:44,884 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-08-12 19:21:44,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:44,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824962457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:44,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:44,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-12 19:21:44,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262521917] [2021-08-12 19:21:44,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:21:44,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:44,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:21:44,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:21:44,972 INFO L87 Difference]: Start difference. First operand 2295 states and 9844 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:45,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:45,574 INFO L93 Difference]: Finished difference Result 2881 states and 12155 transitions. [2021-08-12 19:21:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:21:45,575 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:45,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:45,582 INFO L225 Difference]: With dead ends: 2881 [2021-08-12 19:21:45,583 INFO L226 Difference]: Without dead ends: 2860 [2021-08-12 19:21:45,583 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:21:45,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-08-12 19:21:45,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2414. [2021-08-12 19:21:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2414 states, 2413 states have (on average 4.290509738914214) internal successors, (10353), 2413 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:45,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2414 states to 2414 states and 10353 transitions. [2021-08-12 19:21:45,721 INFO L78 Accepts]: Start accepts. Automaton has 2414 states and 10353 transitions. Word has length 29 [2021-08-12 19:21:45,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:45,721 INFO L482 AbstractCegarLoop]: Abstraction has 2414 states and 10353 transitions. [2021-08-12 19:21:45,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:45,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2414 states and 10353 transitions. [2021-08-12 19:21:45,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:45,725 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:45,725 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:45,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-12 19:21:45,926 INFO L430 AbstractCegarLoop]: === Iteration 50 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:45,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:45,926 INFO L82 PathProgramCache]: Analyzing trace with hash 379944670, now seen corresponding path program 8 times [2021-08-12 19:21:45,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:45,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143950642] [2021-08-12 19:21:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:46,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:46,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143950642] [2021-08-12 19:21:46,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143950642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:46,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727549753] [2021-08-12 19:21:46,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:21:46,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:46,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:46,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:46,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:46,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:46,166 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 [2021-08-12 19:21:46,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:46,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:46,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:46,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:21:46,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:46,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727549753] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:46,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:46,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:46,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118419139] [2021-08-12 19:21:46,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:46,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:46,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:46,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:46,318 INFO L87 Difference]: Start difference. First operand 2414 states and 10353 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:47,283 INFO L93 Difference]: Finished difference Result 2777 states and 11684 transitions. [2021-08-12 19:21:47,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:21:47,283 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:47,291 INFO L225 Difference]: With dead ends: 2777 [2021-08-12 19:21:47,291 INFO L226 Difference]: Without dead ends: 2762 [2021-08-12 19:21:47,291 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 510.1ms TimeCoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:21:47,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2021-08-12 19:21:47,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 2405. [2021-08-12 19:21:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2405 states, 2404 states have (on average 4.294093178036606) internal successors, (10323), 2404 states have internal predecessors, (10323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2405 states to 2405 states and 10323 transitions. [2021-08-12 19:21:47,430 INFO L78 Accepts]: Start accepts. Automaton has 2405 states and 10323 transitions. Word has length 29 [2021-08-12 19:21:47,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:47,430 INFO L482 AbstractCegarLoop]: Abstraction has 2405 states and 10323 transitions. [2021-08-12 19:21:47,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2405 states and 10323 transitions. [2021-08-12 19:21:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:47,434 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:47,434 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:47,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:47,635 INFO L430 AbstractCegarLoop]: === Iteration 51 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:47,635 INFO L82 PathProgramCache]: Analyzing trace with hash -65157350, now seen corresponding path program 9 times [2021-08-12 19:21:47,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:47,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198861904] [2021-08-12 19:21:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:47,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:47,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198861904] [2021-08-12 19:21:47,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198861904] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:47,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481521368] [2021-08-12 19:21:47,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:47,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:21:47,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:47,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:47,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:47,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:47,884 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 [2021-08-12 19:21:47,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:47,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:47,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:47,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:21:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:48,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481521368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:48,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:48,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:21:48,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950422007] [2021-08-12 19:21:48,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:21:48,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:48,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:21:48,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:21:48,035 INFO L87 Difference]: Start difference. First operand 2405 states and 10323 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:49,350 INFO L93 Difference]: Finished difference Result 2805 states and 11728 transitions. [2021-08-12 19:21:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:21:49,350 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:49,358 INFO L225 Difference]: With dead ends: 2805 [2021-08-12 19:21:49,358 INFO L226 Difference]: Without dead ends: 2788 [2021-08-12 19:21:49,359 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 733.9ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:21:49,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2788 states. [2021-08-12 19:21:49,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2788 to 2412. [2021-08-12 19:21:49,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 4.290335960182497) internal successors, (10344), 2411 states have internal predecessors, (10344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 10344 transitions. [2021-08-12 19:21:49,500 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 10344 transitions. Word has length 29 [2021-08-12 19:21:49,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:49,500 INFO L482 AbstractCegarLoop]: Abstraction has 2412 states and 10344 transitions. [2021-08-12 19:21:49,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:49,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 10344 transitions. [2021-08-12 19:21:49,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:49,504 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:49,504 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:49,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:49,705 INFO L430 AbstractCegarLoop]: === Iteration 52 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:49,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:49,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1845755652, now seen corresponding path program 10 times [2021-08-12 19:21:49,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:49,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375591912] [2021-08-12 19:21:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:49,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:49,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375591912] [2021-08-12 19:21:49,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375591912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:49,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631955076] [2021-08-12 19:21:49,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:49,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:21:49,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:49,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:49,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:49,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:21:49,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:49,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:49,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:49,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-08-12 19:21:50,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:50,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631955076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:50,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:50,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-12 19:21:50,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285454292] [2021-08-12 19:21:50,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:21:50,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:50,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:21:50,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:21:50,050 INFO L87 Difference]: Start difference. First operand 2412 states and 10344 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:50,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:50,718 INFO L93 Difference]: Finished difference Result 2909 states and 12224 transitions. [2021-08-12 19:21:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:21:50,719 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:50,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:50,726 INFO L225 Difference]: With dead ends: 2909 [2021-08-12 19:21:50,727 INFO L226 Difference]: Without dead ends: 2876 [2021-08-12 19:21:50,727 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:21:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-08-12 19:21:50,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2334. [2021-08-12 19:21:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 2333 states have (on average 4.294470638662666) internal successors, (10019), 2333 states have internal predecessors, (10019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 10019 transitions. [2021-08-12 19:21:50,869 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 10019 transitions. Word has length 29 [2021-08-12 19:21:50,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:50,869 INFO L482 AbstractCegarLoop]: Abstraction has 2334 states and 10019 transitions. [2021-08-12 19:21:50,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:50,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 10019 transitions. [2021-08-12 19:21:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:50,873 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:50,873 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:51,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:51,073 INFO L430 AbstractCegarLoop]: === Iteration 53 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:51,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:51,074 INFO L82 PathProgramCache]: Analyzing trace with hash 418822894, now seen corresponding path program 11 times [2021-08-12 19:21:51,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:51,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24128208] [2021-08-12 19:21:51,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:51,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:51,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24128208] [2021-08-12 19:21:51,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24128208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:51,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688928940] [2021-08-12 19:21:51,218 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:51,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:51,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:51,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:51,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:51,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:21:51,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-08-12 19:21:51,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:51,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:51,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:51,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-08-12 19:21:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:51,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688928940] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:51,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:51,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-12 19:21:51,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302238248] [2021-08-12 19:21:51,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:21:51,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:51,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:21:51,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:21:51,384 INFO L87 Difference]: Start difference. First operand 2334 states and 10019 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:51,959 INFO L93 Difference]: Finished difference Result 2455 states and 10450 transitions. [2021-08-12 19:21:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:21:51,960 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:51,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:51,967 INFO L225 Difference]: With dead ends: 2455 [2021-08-12 19:21:51,967 INFO L226 Difference]: Without dead ends: 2438 [2021-08-12 19:21:51,967 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:21:51,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-08-12 19:21:52,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2304. [2021-08-12 19:21:52,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 2303 states have (on average 4.291359096830221) internal successors, (9883), 2303 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 9883 transitions. [2021-08-12 19:21:52,104 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 9883 transitions. Word has length 29 [2021-08-12 19:21:52,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:52,105 INFO L482 AbstractCegarLoop]: Abstraction has 2304 states and 9883 transitions. [2021-08-12 19:21:52,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:52,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 9883 transitions. [2021-08-12 19:21:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:52,108 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:52,108 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:52,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:52,309 INFO L430 AbstractCegarLoop]: === Iteration 54 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:52,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:52,309 INFO L82 PathProgramCache]: Analyzing trace with hash -945227760, now seen corresponding path program 12 times [2021-08-12 19:21:52,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:52,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038805612] [2021-08-12 19:21:52,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:52,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:52,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038805612] [2021-08-12 19:21:52,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038805612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:52,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599983779] [2021-08-12 19:21:52,462 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 [2021-08-12 19:21:52,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:21:52,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:52,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:52,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:52,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:52,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-12 19:21:52,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:52,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:52,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:52,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:21:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:52,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599983779] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:52,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:52,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-12 19:21:52,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857505496] [2021-08-12 19:21:52,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:21:52,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:52,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:21:52,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:21:52,708 INFO L87 Difference]: Start difference. First operand 2304 states and 9883 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:53,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:53,800 INFO L93 Difference]: Finished difference Result 2815 states and 11730 transitions. [2021-08-12 19:21:53,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:21:53,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:53,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:53,808 INFO L225 Difference]: With dead ends: 2815 [2021-08-12 19:21:53,808 INFO L226 Difference]: Without dead ends: 2794 [2021-08-12 19:21:53,809 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 572.7ms TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:21:53,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2021-08-12 19:21:53,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 2390. [2021-08-12 19:21:53,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2390 states, 2389 states have (on average 4.2951025533696106) internal successors, (10261), 2389 states have internal predecessors, (10261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2390 states to 2390 states and 10261 transitions. [2021-08-12 19:21:53,980 INFO L78 Accepts]: Start accepts. Automaton has 2390 states and 10261 transitions. Word has length 29 [2021-08-12 19:21:53,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:53,980 INFO L482 AbstractCegarLoop]: Abstraction has 2390 states and 10261 transitions. [2021-08-12 19:21:53,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2390 states and 10261 transitions. [2021-08-12 19:21:53,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:53,985 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:53,985 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:54,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-12 19:21:54,204 INFO L430 AbstractCegarLoop]: === Iteration 55 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:54,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:54,204 INFO L82 PathProgramCache]: Analyzing trace with hash 477127066, now seen corresponding path program 13 times [2021-08-12 19:21:54,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:54,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046734985] [2021-08-12 19:21:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:54,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:54,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046734985] [2021-08-12 19:21:54,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046734985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:54,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256695352] [2021-08-12 19:21:54,350 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 [2021-08-12 19:21:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:54,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:54,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:54,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:21:54,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:54,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:54,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:54,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-08-12 19:21:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:54,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256695352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:54,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:54,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-08-12 19:21:54,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109940564] [2021-08-12 19:21:54,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:21:54,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:54,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:21:54,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:21:54,521 INFO L87 Difference]: Start difference. First operand 2390 states and 10261 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:55,223 INFO L93 Difference]: Finished difference Result 2892 states and 12138 transitions. [2021-08-12 19:21:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:21:55,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:55,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:55,231 INFO L225 Difference]: With dead ends: 2892 [2021-08-12 19:21:55,231 INFO L226 Difference]: Without dead ends: 2875 [2021-08-12 19:21:55,231 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:21:55,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2875 states. [2021-08-12 19:21:55,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2875 to 2409. [2021-08-12 19:21:55,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 4.284883720930233) internal successors, (10318), 2408 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 10318 transitions. [2021-08-12 19:21:55,378 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 10318 transitions. Word has length 29 [2021-08-12 19:21:55,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:55,378 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 10318 transitions. [2021-08-12 19:21:55,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 10318 transitions. [2021-08-12 19:21:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:55,382 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:55,382 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:55,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:55,583 INFO L430 AbstractCegarLoop]: === Iteration 56 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:55,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:55,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1191266376, now seen corresponding path program 14 times [2021-08-12 19:21:55,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:55,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943570400] [2021-08-12 19:21:55,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:55,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:55,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943570400] [2021-08-12 19:21:55,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943570400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:55,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323918048] [2021-08-12 19:21:55,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:55,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:21:55,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:55,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:55,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:55,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:55,813 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-08-12 19:21:55,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:55,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:55,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:55,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:21:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:55,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323918048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:55,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:55,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-12 19:21:55,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704212589] [2021-08-12 19:21:55,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:21:55,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:55,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:21:55,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:21:55,944 INFO L87 Difference]: Start difference. First operand 2409 states and 10318 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:56,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:56,964 INFO L93 Difference]: Finished difference Result 2800 states and 11681 transitions. [2021-08-12 19:21:56,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:21:56,964 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:56,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:56,972 INFO L225 Difference]: With dead ends: 2800 [2021-08-12 19:21:56,972 INFO L226 Difference]: Without dead ends: 2784 [2021-08-12 19:21:56,972 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 479.0ms TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:21:56,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2784 states. [2021-08-12 19:21:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2784 to 2400. [2021-08-12 19:21:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 4.2884535223009586) internal successors, (10288), 2399 states have internal predecessors, (10288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 10288 transitions. [2021-08-12 19:21:57,119 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 10288 transitions. Word has length 29 [2021-08-12 19:21:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:57,120 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 10288 transitions. [2021-08-12 19:21:57,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 10288 transitions. [2021-08-12 19:21:57,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:57,123 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:57,123 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:57,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-12 19:21:57,324 INFO L430 AbstractCegarLoop]: === Iteration 57 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:57,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:57,324 INFO L82 PathProgramCache]: Analyzing trace with hash 878000598, now seen corresponding path program 15 times [2021-08-12 19:21:57,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:57,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079717423] [2021-08-12 19:21:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:57,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:57,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:57,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079717423] [2021-08-12 19:21:57,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079717423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:57,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627270701] [2021-08-12 19:21:57,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:57,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:21:57,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:57,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:57,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:57,571 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:57,571 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 [2021-08-12 19:21:57,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:21:57,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:57,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:57,581 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:21:57,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:57,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627270701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:57,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:57,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-12 19:21:57,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305549404] [2021-08-12 19:21:57,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:21:57,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:57,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:21:57,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:21:57,703 INFO L87 Difference]: Start difference. First operand 2400 states and 10288 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:58,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:21:58,785 INFO L93 Difference]: Finished difference Result 2784 states and 11654 transitions. [2021-08-12 19:21:58,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:21:58,786 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:21:58,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:21:58,793 INFO L225 Difference]: With dead ends: 2784 [2021-08-12 19:21:58,793 INFO L226 Difference]: Without dead ends: 2759 [2021-08-12 19:21:58,794 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 531.3ms TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:21:58,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2021-08-12 19:21:58,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 2330. [2021-08-12 19:21:58,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 4.288535852297123) internal successors, (9988), 2329 states have internal predecessors, (9988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:58,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 9988 transitions. [2021-08-12 19:21:58,965 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 9988 transitions. Word has length 29 [2021-08-12 19:21:58,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:21:58,965 INFO L482 AbstractCegarLoop]: Abstraction has 2330 states and 9988 transitions. [2021-08-12 19:21:58,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:21:58,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 9988 transitions. [2021-08-12 19:21:58,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:21:58,970 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:21:58,970 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:21:59,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-12 19:21:59,185 INFO L430 AbstractCegarLoop]: === Iteration 58 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:21:59,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:21:59,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1598176080, now seen corresponding path program 16 times [2021-08-12 19:21:59,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:21:59,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143776522] [2021-08-12 19:21:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:21:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:21:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:59,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:21:59,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143776522] [2021-08-12 19:21:59,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143776522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:59,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329164675] [2021-08-12 19:21:59,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:21:59,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:21:59,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:21:59,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:21:59,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:21:59,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:21:59,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-08-12 19:21:59,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:21:59,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:21:59,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:21:59,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-08-12 19:21:59,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:21:59,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329164675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:21:59,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:21:59,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-12 19:21:59,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699792602] [2021-08-12 19:21:59,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:21:59,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:21:59,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:21:59,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:21:59,528 INFO L87 Difference]: Start difference. First operand 2330 states and 9988 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:00,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:00,267 INFO L93 Difference]: Finished difference Result 2464 states and 10430 transitions. [2021-08-12 19:22:00,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:22:00,267 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:00,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:00,274 INFO L225 Difference]: With dead ends: 2464 [2021-08-12 19:22:00,274 INFO L226 Difference]: Without dead ends: 2443 [2021-08-12 19:22:00,274 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2443 states. [2021-08-12 19:22:00,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2443 to 2330. [2021-08-12 19:22:00,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 4.288535852297123) internal successors, (9988), 2329 states have internal predecessors, (9988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 9988 transitions. [2021-08-12 19:22:00,424 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 9988 transitions. Word has length 29 [2021-08-12 19:22:00,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:00,424 INFO L482 AbstractCegarLoop]: Abstraction has 2330 states and 9988 transitions. [2021-08-12 19:22:00,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:00,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 9988 transitions. [2021-08-12 19:22:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:00,427 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:00,427 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:00,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:00,628 INFO L430 AbstractCegarLoop]: === Iteration 59 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:00,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1147156396, now seen corresponding path program 17 times [2021-08-12 19:22:00,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:00,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85368579] [2021-08-12 19:22:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:00,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:00,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85368579] [2021-08-12 19:22:00,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85368579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:00,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350232365] [2021-08-12 19:22:00,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:00,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:22:00,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:00,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-12 19:22:00,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:00,829 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 [2021-08-12 19:22:00,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:22:00,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:00,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:00,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:24 [2021-08-12 19:22:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:00,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350232365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:00,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:00,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-12 19:22:00,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877922988] [2021-08-12 19:22:00,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:22:00,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:00,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:22:00,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:22:00,937 INFO L87 Difference]: Start difference. First operand 2330 states and 9988 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:01,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:01,753 INFO L93 Difference]: Finished difference Result 2899 states and 12148 transitions. [2021-08-12 19:22:01,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:22:01,753 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:01,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:01,761 INFO L225 Difference]: With dead ends: 2899 [2021-08-12 19:22:01,761 INFO L226 Difference]: Without dead ends: 2874 [2021-08-12 19:22:01,762 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:22:01,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2021-08-12 19:22:01,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 2325. [2021-08-12 19:22:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2324 states have (on average 4.291308089500861) internal successors, (9973), 2324 states have internal predecessors, (9973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 9973 transitions. [2021-08-12 19:22:01,912 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 9973 transitions. Word has length 29 [2021-08-12 19:22:01,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:01,912 INFO L482 AbstractCegarLoop]: Abstraction has 2325 states and 9973 transitions. [2021-08-12 19:22:01,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:01,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 9973 transitions. [2021-08-12 19:22:01,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:01,916 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:01,916 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:02,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-12 19:22:02,117 INFO L430 AbstractCegarLoop]: === Iteration 60 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:02,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:02,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1345773056, now seen corresponding path program 18 times [2021-08-12 19:22:02,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:02,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411561010] [2021-08-12 19:22:02,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:02,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:02,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411561010] [2021-08-12 19:22:02,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411561010] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:02,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687170662] [2021-08-12 19:22:02,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:02,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:22:02,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:02,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:22:02,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:02,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:02,284 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 [2021-08-12 19:22:02,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:22:02,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:02,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:02,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-08-12 19:22:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:02,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687170662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:02,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:02,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-12 19:22:02,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614997302] [2021-08-12 19:22:02,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:22:02,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:02,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:22:02,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:02,405 INFO L87 Difference]: Start difference. First operand 2325 states and 9973 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:03,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:03,716 INFO L93 Difference]: Finished difference Result 3211 states and 13479 transitions. [2021-08-12 19:22:03,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:22:03,716 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:03,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:03,744 INFO L225 Difference]: With dead ends: 3211 [2021-08-12 19:22:03,745 INFO L226 Difference]: Without dead ends: 3190 [2021-08-12 19:22:03,745 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 518.9ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:22:03,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-08-12 19:22:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2447. [2021-08-12 19:22:03,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2447 states, 2446 states have (on average 4.289452166802944) internal successors, (10492), 2446 states have internal predecessors, (10492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:03,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2447 states to 2447 states and 10492 transitions. [2021-08-12 19:22:03,903 INFO L78 Accepts]: Start accepts. Automaton has 2447 states and 10492 transitions. Word has length 29 [2021-08-12 19:22:03,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:03,903 INFO L482 AbstractCegarLoop]: Abstraction has 2447 states and 10492 transitions. [2021-08-12 19:22:03,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:03,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2447 states and 10492 transitions. [2021-08-12 19:22:03,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:03,907 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:03,907 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:04,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:04,107 INFO L430 AbstractCegarLoop]: === Iteration 61 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:04,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:04,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1526839414, now seen corresponding path program 19 times [2021-08-12 19:22:04,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:04,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979425507] [2021-08-12 19:22:04,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:04,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:04,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979425507] [2021-08-12 19:22:04,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979425507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:04,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502539291] [2021-08-12 19:22:04,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:22:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:04,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:04,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:04,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:22:04,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-08-12 19:22:04,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:22:04,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:04,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:04,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-08-12 19:22:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:04,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502539291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:04,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:04,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:22:04,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730440121] [2021-08-12 19:22:04,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:22:04,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:04,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:22:04,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:22:04,344 INFO L87 Difference]: Start difference. First operand 2447 states and 10492 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:05,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:05,066 INFO L93 Difference]: Finished difference Result 2903 states and 12203 transitions. [2021-08-12 19:22:05,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:22:05,066 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:05,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:05,074 INFO L225 Difference]: With dead ends: 2903 [2021-08-12 19:22:05,074 INFO L226 Difference]: Without dead ends: 2870 [2021-08-12 19:22:05,074 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:22:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-08-12 19:22:05,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2384. [2021-08-12 19:22:05,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2384 states, 2383 states have (on average 4.303399076793958) internal successors, (10255), 2383 states have internal predecessors, (10255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2384 states to 2384 states and 10255 transitions. [2021-08-12 19:22:05,235 INFO L78 Accepts]: Start accepts. Automaton has 2384 states and 10255 transitions. Word has length 29 [2021-08-12 19:22:05,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:05,235 INFO L482 AbstractCegarLoop]: Abstraction has 2384 states and 10255 transitions. [2021-08-12 19:22:05,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2384 states and 10255 transitions. [2021-08-12 19:22:05,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:05,239 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:05,239 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:05,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-12 19:22:05,441 INFO L430 AbstractCegarLoop]: === Iteration 62 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:05,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:05,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1487961190, now seen corresponding path program 20 times [2021-08-12 19:22:05,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:05,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209865012] [2021-08-12 19:22:05,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:05,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:05,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209865012] [2021-08-12 19:22:05,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209865012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:05,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522436485] [2021-08-12 19:22:05,528 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 [2021-08-12 19:22:05,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:22:05,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:05,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:05,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:05,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:05,641 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 [2021-08-12 19:22:05,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:22:05,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:05,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:05,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:22:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:05,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522436485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:05,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:05,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-12 19:22:05,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138763635] [2021-08-12 19:22:05,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:22:05,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:05,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:22:05,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:05,790 INFO L87 Difference]: Start difference. First operand 2384 states and 10255 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:06,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:06,745 INFO L93 Difference]: Finished difference Result 2551 states and 10863 transitions. [2021-08-12 19:22:06,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:22:06,745 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:06,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:06,752 INFO L225 Difference]: With dead ends: 2551 [2021-08-12 19:22:06,752 INFO L226 Difference]: Without dead ends: 2534 [2021-08-12 19:22:06,753 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 386.9ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:22:06,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2534 states. [2021-08-12 19:22:06,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2534 to 2369. [2021-08-12 19:22:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 2368 states have (on average 4.307010135135135) internal successors, (10199), 2368 states have internal predecessors, (10199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:06,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 10199 transitions. [2021-08-12 19:22:06,913 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 10199 transitions. Word has length 29 [2021-08-12 19:22:06,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:06,913 INFO L482 AbstractCegarLoop]: Abstraction has 2369 states and 10199 transitions. [2021-08-12 19:22:06,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:06,913 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 10199 transitions. [2021-08-12 19:22:06,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:06,916 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:06,916 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:07,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:07,117 INFO L430 AbstractCegarLoop]: === Iteration 63 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:07,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1442955452, now seen corresponding path program 21 times [2021-08-12 19:22:07,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:07,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940223118] [2021-08-12 19:22:07,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:07,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:07,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:07,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940223118] [2021-08-12 19:22:07,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940223118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:07,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694689941] [2021-08-12 19:22:07,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:07,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:22:07,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:07,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:22:07,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:07,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:07,272 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 [2021-08-12 19:22:07,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:22:07,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:07,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:07,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-08-12 19:22:07,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:07,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694689941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:07,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:07,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-12 19:22:07,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062060553] [2021-08-12 19:22:07,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:22:07,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:07,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:22:07,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:07,385 INFO L87 Difference]: Start difference. First operand 2369 states and 10199 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:08,803 INFO L93 Difference]: Finished difference Result 3300 states and 13756 transitions. [2021-08-12 19:22:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:22:08,803 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:08,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:08,812 INFO L225 Difference]: With dead ends: 3300 [2021-08-12 19:22:08,812 INFO L226 Difference]: Without dead ends: 3279 [2021-08-12 19:22:08,813 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 525.9ms TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:22:08,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3279 states. [2021-08-12 19:22:08,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3279 to 2473. [2021-08-12 19:22:08,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 2472 states have (on average 4.303398058252427) internal successors, (10638), 2472 states have internal predecessors, (10638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:08,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 10638 transitions. [2021-08-12 19:22:08,979 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 10638 transitions. Word has length 29 [2021-08-12 19:22:08,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:08,980 INFO L482 AbstractCegarLoop]: Abstraction has 2473 states and 10638 transitions. [2021-08-12 19:22:08,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:08,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 10638 transitions. [2021-08-12 19:22:08,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:08,983 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:08,983 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:09,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-08-12 19:22:09,184 INFO L430 AbstractCegarLoop]: === Iteration 64 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:09,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:09,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1429657018, now seen corresponding path program 22 times [2021-08-12 19:22:09,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:09,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103334206] [2021-08-12 19:22:09,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:09,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:09,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:09,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103334206] [2021-08-12 19:22:09,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103334206] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:09,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137474879] [2021-08-12 19:22:09,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:09,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:22:09,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:09,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:09,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:09,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:22:09,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:22:09,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:09,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:09,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-08-12 19:22:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:09,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137474879] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:09,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:09,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-12 19:22:09,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184342874] [2021-08-12 19:22:09,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:22:09,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:09,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:22:09,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:22:09,436 INFO L87 Difference]: Start difference. First operand 2473 states and 10638 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:10,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:10,196 INFO L93 Difference]: Finished difference Result 2930 states and 12341 transitions. [2021-08-12 19:22:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:22:10,196 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:10,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:10,204 INFO L225 Difference]: With dead ends: 2930 [2021-08-12 19:22:10,204 INFO L226 Difference]: Without dead ends: 2897 [2021-08-12 19:22:10,205 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:22:10,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-08-12 19:22:10,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2393. [2021-08-12 19:22:10,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 2392 states have (on average 4.306438127090301) internal successors, (10301), 2392 states have internal predecessors, (10301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:10,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 10301 transitions. [2021-08-12 19:22:10,373 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 10301 transitions. Word has length 29 [2021-08-12 19:22:10,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:10,373 INFO L482 AbstractCegarLoop]: Abstraction has 2393 states and 10301 transitions. [2021-08-12 19:22:10,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 10301 transitions. [2021-08-12 19:22:10,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:10,376 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:10,377 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:10,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:10,577 INFO L430 AbstractCegarLoop]: === Iteration 65 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:10,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:10,577 INFO L82 PathProgramCache]: Analyzing trace with hash -308608004, now seen corresponding path program 23 times [2021-08-12 19:22:10,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:10,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520229087] [2021-08-12 19:22:10,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:10,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:10,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520229087] [2021-08-12 19:22:10,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520229087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:10,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677942474] [2021-08-12 19:22:10,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:10,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:22:10,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:10,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:10,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:10,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:22:10,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:22:10,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:10,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:10,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-08-12 19:22:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:10,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677942474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:10,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:10,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 19:22:10,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091600849] [2021-08-12 19:22:10,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:22:10,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:10,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:22:10,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:22:10,817 INFO L87 Difference]: Start difference. First operand 2393 states and 10301 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:11,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:11,420 INFO L93 Difference]: Finished difference Result 2529 states and 10751 transitions. [2021-08-12 19:22:11,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:22:11,420 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:11,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:11,427 INFO L225 Difference]: With dead ends: 2529 [2021-08-12 19:22:11,427 INFO L226 Difference]: Without dead ends: 2508 [2021-08-12 19:22:11,428 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:22:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2508 states. [2021-08-12 19:22:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2508 to 2381. [2021-08-12 19:22:11,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 4.310504201680672) internal successors, (10259), 2380 states have internal predecessors, (10259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 10259 transitions. [2021-08-12 19:22:11,616 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 10259 transitions. Word has length 29 [2021-08-12 19:22:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:11,616 INFO L482 AbstractCegarLoop]: Abstraction has 2381 states and 10259 transitions. [2021-08-12 19:22:11,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:11,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 10259 transitions. [2021-08-12 19:22:11,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:11,620 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:11,620 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:11,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-12 19:22:11,820 INFO L430 AbstractCegarLoop]: === Iteration 66 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:11,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1817093934, now seen corresponding path program 24 times [2021-08-12 19:22:11,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:11,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706632770] [2021-08-12 19:22:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:11,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:11,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706632770] [2021-08-12 19:22:11,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706632770] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:11,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424910754] [2021-08-12 19:22:11,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:11,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:22:11,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:11,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:22:11,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:12,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:12,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:22:12,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:22:12,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:12,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:12,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:17 [2021-08-12 19:22:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:12,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424910754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:12,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:12,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-12 19:22:12,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262037256] [2021-08-12 19:22:12,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:22:12,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:12,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:22:12,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:12,156 INFO L87 Difference]: Start difference. First operand 2381 states and 10259 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:13,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:13,839 INFO L93 Difference]: Finished difference Result 3456 states and 14371 transitions. [2021-08-12 19:22:13,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:22:13,839 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:13,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:13,848 INFO L225 Difference]: With dead ends: 3456 [2021-08-12 19:22:13,848 INFO L226 Difference]: Without dead ends: 3435 [2021-08-12 19:22:13,849 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 649.5ms TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:22:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2021-08-12 19:22:14,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 2493. [2021-08-12 19:22:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2493 states, 2492 states have (on average 4.303370786516854) internal successors, (10724), 2492 states have internal predecessors, (10724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2493 states to 2493 states and 10724 transitions. [2021-08-12 19:22:14,050 INFO L78 Accepts]: Start accepts. Automaton has 2493 states and 10724 transitions. Word has length 29 [2021-08-12 19:22:14,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:14,050 INFO L482 AbstractCegarLoop]: Abstraction has 2493 states and 10724 transitions. [2021-08-12 19:22:14,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2493 states and 10724 transitions. [2021-08-12 19:22:14,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:14,053 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:14,053 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:14,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:14,257 INFO L430 AbstractCegarLoop]: === Iteration 67 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:14,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:14,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1055518536, now seen corresponding path program 25 times [2021-08-12 19:22:14,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:14,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942295406] [2021-08-12 19:22:14,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:14,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:14,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:14,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942295406] [2021-08-12 19:22:14,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942295406] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:14,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30125278] [2021-08-12 19:22:14,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:14,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:14,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:22:14,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:22:14,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:14,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:14,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-08-12 19:22:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:14,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30125278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:14,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:14,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-12 19:22:14,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226159529] [2021-08-12 19:22:14,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:22:14,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:14,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:22:14,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:22:14,509 INFO L87 Difference]: Start difference. First operand 2493 states and 10724 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:15,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:15,410 INFO L93 Difference]: Finished difference Result 3038 states and 12794 transitions. [2021-08-12 19:22:15,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:22:15,410 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:15,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:15,418 INFO L225 Difference]: With dead ends: 3038 [2021-08-12 19:22:15,418 INFO L226 Difference]: Without dead ends: 3005 [2021-08-12 19:22:15,419 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:15,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3005 states. [2021-08-12 19:22:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3005 to 2413. [2021-08-12 19:22:15,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 4.3063847429519075) internal successors, (10387), 2412 states have internal predecessors, (10387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 10387 transitions. [2021-08-12 19:22:15,598 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 10387 transitions. Word has length 29 [2021-08-12 19:22:15,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:15,598 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 10387 transitions. [2021-08-12 19:22:15,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:15,598 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 10387 transitions. [2021-08-12 19:22:15,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:15,601 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:15,601 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:15,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-12 19:22:15,805 INFO L430 AbstractCegarLoop]: === Iteration 68 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:15,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:15,806 INFO L82 PathProgramCache]: Analyzing trace with hash 65530478, now seen corresponding path program 26 times [2021-08-12 19:22:15,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:15,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617165981] [2021-08-12 19:22:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:15,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:15,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617165981] [2021-08-12 19:22:15,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617165981] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:15,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138014532] [2021-08-12 19:22:15,887 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 [2021-08-12 19:22:15,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:22:15,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:15,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:15,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:15,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:15,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:22:15,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:22:16,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:16,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:16,004 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-08-12 19:22:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:16,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138014532] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:16,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:16,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-08-12 19:22:16,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3125392] [2021-08-12 19:22:16,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:22:16,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:16,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:22:16,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:22:16,119 INFO L87 Difference]: Start difference. First operand 2413 states and 10387 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:17,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:17,337 INFO L93 Difference]: Finished difference Result 2677 states and 11279 transitions. [2021-08-12 19:22:17,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:22:17,337 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:17,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:17,344 INFO L225 Difference]: With dead ends: 2677 [2021-08-12 19:22:17,345 INFO L226 Difference]: Without dead ends: 2656 [2021-08-12 19:22:17,345 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 488.6ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:22:17,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2021-08-12 19:22:17,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2389. [2021-08-12 19:22:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 4.306951423785595) internal successors, (10285), 2388 states have internal predecessors, (10285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 10285 transitions. [2021-08-12 19:22:17,539 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 10285 transitions. Word has length 29 [2021-08-12 19:22:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:17,539 INFO L482 AbstractCegarLoop]: Abstraction has 2389 states and 10285 transitions. [2021-08-12 19:22:17,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 10285 transitions. [2021-08-12 19:22:17,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:17,542 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:17,542 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:17,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-12 19:22:17,743 INFO L430 AbstractCegarLoop]: === Iteration 69 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:17,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:17,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2073834836, now seen corresponding path program 27 times [2021-08-12 19:22:17,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:17,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117186220] [2021-08-12 19:22:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:17,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:17,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117186220] [2021-08-12 19:22:17,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117186220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:17,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394764550] [2021-08-12 19:22:17,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:17,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:22:17,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:17,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:17,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:18,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:18,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-08-12 19:22:18,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:22:18,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:18,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:18,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-08-12 19:22:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:18,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394764550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:18,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:18,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-12 19:22:18,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693468221] [2021-08-12 19:22:18,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:22:18,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:18,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:22:18,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:18,143 INFO L87 Difference]: Start difference. First operand 2389 states and 10285 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:19,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:19,278 INFO L93 Difference]: Finished difference Result 2610 states and 11021 transitions. [2021-08-12 19:22:19,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:22:19,279 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:19,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:19,286 INFO L225 Difference]: With dead ends: 2610 [2021-08-12 19:22:19,286 INFO L226 Difference]: Without dead ends: 2589 [2021-08-12 19:22:19,287 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 534.4ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:22:19,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-08-12 19:22:19,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2392. [2021-08-12 19:22:19,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 4.303638644918444) internal successors, (10290), 2391 states have internal predecessors, (10290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:19,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 10290 transitions. [2021-08-12 19:22:19,462 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 10290 transitions. Word has length 29 [2021-08-12 19:22:19,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:19,462 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 10290 transitions. [2021-08-12 19:22:19,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:19,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 10290 transitions. [2021-08-12 19:22:19,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:19,465 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:19,465 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:19,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-12 19:22:19,666 INFO L430 AbstractCegarLoop]: === Iteration 70 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:19,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:19,666 INFO L82 PathProgramCache]: Analyzing trace with hash -918912018, now seen corresponding path program 1 times [2021-08-12 19:22:19,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:19,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654145714] [2021-08-12 19:22:19,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:19,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:19,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:19,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654145714] [2021-08-12 19:22:19,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654145714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:19,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14717706] [2021-08-12 19:22:19,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:19,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:19,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:19,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:22:19,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:22:19,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:19,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:19,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:10 [2021-08-12 19:22:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:19,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14717706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:19,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:19,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-12 19:22:19,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58994939] [2021-08-12 19:22:19,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:22:19,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:19,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:22:19,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:22:19,993 INFO L87 Difference]: Start difference. First operand 2392 states and 10290 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:20,915 INFO L93 Difference]: Finished difference Result 2646 states and 11190 transitions. [2021-08-12 19:22:20,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:22:20,915 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:20,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:20,923 INFO L225 Difference]: With dead ends: 2646 [2021-08-12 19:22:20,923 INFO L226 Difference]: Without dead ends: 2625 [2021-08-12 19:22:20,923 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-12 19:22:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-08-12 19:22:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2494. [2021-08-12 19:22:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2493 states have (on average 4.292418772563177) internal successors, (10701), 2493 states have internal predecessors, (10701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:21,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 10701 transitions. [2021-08-12 19:22:21,116 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 10701 transitions. Word has length 29 [2021-08-12 19:22:21,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:21,117 INFO L482 AbstractCegarLoop]: Abstraction has 2494 states and 10701 transitions. [2021-08-12 19:22:21,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:21,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 10701 transitions. [2021-08-12 19:22:21,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:21,120 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:21,120 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:21,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:21,321 INFO L430 AbstractCegarLoop]: === Iteration 71 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:21,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:21,321 INFO L82 PathProgramCache]: Analyzing trace with hash -923682226, now seen corresponding path program 1 times [2021-08-12 19:22:21,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:21,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379084417] [2021-08-12 19:22:21,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:21,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:21,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:21,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379084417] [2021-08-12 19:22:21,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379084417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:21,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606297297] [2021-08-12 19:22:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:21,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:21,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:21,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:22:21,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:22:21,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:21,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:21,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:10 [2021-08-12 19:22:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:21,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606297297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:21,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:21,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-12 19:22:21,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621988036] [2021-08-12 19:22:21,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:22:21,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:21,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:22:21,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:22:21,604 INFO L87 Difference]: Start difference. First operand 2494 states and 10701 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:22,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:22,433 INFO L93 Difference]: Finished difference Result 2655 states and 11211 transitions. [2021-08-12 19:22:22,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:22:22,434 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:22,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:22,441 INFO L225 Difference]: With dead ends: 2655 [2021-08-12 19:22:22,441 INFO L226 Difference]: Without dead ends: 2634 [2021-08-12 19:22:22,442 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2634 states. [2021-08-12 19:22:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2634 to 2496. [2021-08-12 19:22:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2496 states, 2495 states have (on average 4.292184368737475) internal successors, (10709), 2495 states have internal predecessors, (10709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2496 states to 2496 states and 10709 transitions. [2021-08-12 19:22:22,638 INFO L78 Accepts]: Start accepts. Automaton has 2496 states and 10709 transitions. Word has length 29 [2021-08-12 19:22:22,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:22,638 INFO L482 AbstractCegarLoop]: Abstraction has 2496 states and 10709 transitions. [2021-08-12 19:22:22,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:22,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2496 states and 10709 transitions. [2021-08-12 19:22:22,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:22,642 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:22,642 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:22,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:22,845 INFO L430 AbstractCegarLoop]: === Iteration 72 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1926683450, now seen corresponding path program 2 times [2021-08-12 19:22:22,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:22,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481120522] [2021-08-12 19:22:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:23,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:23,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481120522] [2021-08-12 19:22:23,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481120522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:23,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237763796] [2021-08-12 19:22:23,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:23,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:22:23,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:23,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:23,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:23,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:23,172 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 [2021-08-12 19:22:23,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:22:23,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:23,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:23,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-08-12 19:22:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:23,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237763796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:23,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:23,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-12 19:22:23,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498313399] [2021-08-12 19:22:23,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:22:23,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:23,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:22:23,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:22:23,290 INFO L87 Difference]: Start difference. First operand 2496 states and 10709 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:24,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:24,625 INFO L93 Difference]: Finished difference Result 2861 states and 12088 transitions. [2021-08-12 19:22:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:22:24,625 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:24,633 INFO L225 Difference]: With dead ends: 2861 [2021-08-12 19:22:24,633 INFO L226 Difference]: Without dead ends: 2840 [2021-08-12 19:22:24,634 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 641.6ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:22:24,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-08-12 19:22:24,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2526. [2021-08-12 19:22:24,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2526 states, 2525 states have (on average 4.295049504950495) internal successors, (10845), 2525 states have internal predecessors, (10845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2526 states to 2526 states and 10845 transitions. [2021-08-12 19:22:24,855 INFO L78 Accepts]: Start accepts. Automaton has 2526 states and 10845 transitions. Word has length 29 [2021-08-12 19:22:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:24,855 INFO L482 AbstractCegarLoop]: Abstraction has 2526 states and 10845 transitions. [2021-08-12 19:22:24,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2526 states and 10845 transitions. [2021-08-12 19:22:24,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:24,859 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:24,859 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:25,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:25,060 INFO L430 AbstractCegarLoop]: === Iteration 73 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:25,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:25,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1804686422, now seen corresponding path program 3 times [2021-08-12 19:22:25,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:25,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991286860] [2021-08-12 19:22:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:25,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:25,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991286860] [2021-08-12 19:22:25,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991286860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:25,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001348328] [2021-08-12 19:22:25,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:25,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:22:25,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:25,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:25,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:25,354 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:25,354 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:22:25,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:22:25,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:25,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:25,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-08-12 19:22:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:25,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001348328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:25,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:25,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-12 19:22:25,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134376252] [2021-08-12 19:22:25,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:22:25,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:25,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:22:25,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:22:25,453 INFO L87 Difference]: Start difference. First operand 2526 states and 10845 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:27,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:27,049 INFO L93 Difference]: Finished difference Result 3104 states and 12907 transitions. [2021-08-12 19:22:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 19:22:27,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:27,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:27,057 INFO L225 Difference]: With dead ends: 3104 [2021-08-12 19:22:27,057 INFO L226 Difference]: Without dead ends: 3064 [2021-08-12 19:22:27,058 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 673.9ms TimeCoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 19:22:27,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-08-12 19:22:27,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 2589. [2021-08-12 19:22:27,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2589 states, 2588 states have (on average 4.299459041731066) internal successors, (11127), 2588 states have internal predecessors, (11127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2589 states to 2589 states and 11127 transitions. [2021-08-12 19:22:27,295 INFO L78 Accepts]: Start accepts. Automaton has 2589 states and 11127 transitions. Word has length 29 [2021-08-12 19:22:27,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:27,295 INFO L482 AbstractCegarLoop]: Abstraction has 2589 states and 11127 transitions. [2021-08-12 19:22:27,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:27,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2589 states and 11127 transitions. [2021-08-12 19:22:27,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:27,299 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:27,299 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:27,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-08-12 19:22:27,501 INFO L430 AbstractCegarLoop]: === Iteration 74 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:27,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:27,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1433461416, now seen corresponding path program 4 times [2021-08-12 19:22:27,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:27,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445794050] [2021-08-12 19:22:27,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:27,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:27,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445794050] [2021-08-12 19:22:27,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445794050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:27,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221862054] [2021-08-12 19:22:27,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:27,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:22:27,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:27,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:27,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:27,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:22:27,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:22:27,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:27,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:27,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-08-12 19:22:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:27,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221862054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:27,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:27,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-08-12 19:22:27,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696354629] [2021-08-12 19:22:27,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:22:27,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:27,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:22:27,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:22:27,850 INFO L87 Difference]: Start difference. First operand 2589 states and 11127 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:28,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:28,989 INFO L93 Difference]: Finished difference Result 3138 states and 13221 transitions. [2021-08-12 19:22:28,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:22:28,989 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:28,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:28,998 INFO L225 Difference]: With dead ends: 3138 [2021-08-12 19:22:28,998 INFO L226 Difference]: Without dead ends: 3121 [2021-08-12 19:22:28,999 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:22:29,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2021-08-12 19:22:29,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 2605. [2021-08-12 19:22:29,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 2604 states have (on average 4.29147465437788) internal successors, (11175), 2604 states have internal predecessors, (11175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:29,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 11175 transitions. [2021-08-12 19:22:29,209 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 11175 transitions. Word has length 29 [2021-08-12 19:22:29,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:29,209 INFO L482 AbstractCegarLoop]: Abstraction has 2605 states and 11175 transitions. [2021-08-12 19:22:29,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:29,209 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 11175 transitions. [2021-08-12 19:22:29,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:29,213 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:29,213 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:29,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:29,417 INFO L430 AbstractCegarLoop]: === Iteration 75 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:29,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:29,417 INFO L82 PathProgramCache]: Analyzing trace with hash -234932026, now seen corresponding path program 5 times [2021-08-12 19:22:29,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:29,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124477828] [2021-08-12 19:22:29,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:29,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:29,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124477828] [2021-08-12 19:22:29,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124477828] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:29,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156831243] [2021-08-12 19:22:29,574 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 [2021-08-12 19:22:29,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:22:29,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:29,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:29,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:29,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:22:29,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:22:29,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:29,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:29,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-08-12 19:22:29,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:29,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156831243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:29,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:29,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-08-12 19:22:29,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533259620] [2021-08-12 19:22:29,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:22:29,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:29,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:22:29,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:22:29,725 INFO L87 Difference]: Start difference. First operand 2605 states and 11175 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:30,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:30,900 INFO L93 Difference]: Finished difference Result 3151 states and 13271 transitions. [2021-08-12 19:22:30,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 19:22:30,901 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:30,909 INFO L225 Difference]: With dead ends: 3151 [2021-08-12 19:22:30,909 INFO L226 Difference]: Without dead ends: 3123 [2021-08-12 19:22:30,910 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 299.2ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:22:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2021-08-12 19:22:31,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 2510. [2021-08-12 19:22:31,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2510 states, 2509 states have (on average 4.302909525707453) internal successors, (10796), 2509 states have internal predecessors, (10796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2510 states to 2510 states and 10796 transitions. [2021-08-12 19:22:31,123 INFO L78 Accepts]: Start accepts. Automaton has 2510 states and 10796 transitions. Word has length 29 [2021-08-12 19:22:31,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:31,123 INFO L482 AbstractCegarLoop]: Abstraction has 2510 states and 10796 transitions. [2021-08-12 19:22:31,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:31,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2510 states and 10796 transitions. [2021-08-12 19:22:31,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:31,127 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:31,127 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:31,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:31,337 INFO L430 AbstractCegarLoop]: === Iteration 76 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:31,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1913873990, now seen corresponding path program 2 times [2021-08-12 19:22:31,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:31,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208378419] [2021-08-12 19:22:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:31,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:31,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208378419] [2021-08-12 19:22:31,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208378419] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:31,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530127387] [2021-08-12 19:22:31,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:31,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:22:31,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:31,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:31,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:31,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:31,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:22:31,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:22:31,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:31,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:31,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-08-12 19:22:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:31,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530127387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:31,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:31,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-12 19:22:31,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730779639] [2021-08-12 19:22:31,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:22:31,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:31,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:22:31,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:31,670 INFO L87 Difference]: Start difference. First operand 2510 states and 10796 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:33,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:33,183 INFO L93 Difference]: Finished difference Result 3043 states and 12781 transitions. [2021-08-12 19:22:33,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:22:33,184 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:33,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:33,192 INFO L225 Difference]: With dead ends: 3043 [2021-08-12 19:22:33,192 INFO L226 Difference]: Without dead ends: 3022 [2021-08-12 19:22:33,193 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 565.2ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:22:33,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3022 states. [2021-08-12 19:22:33,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3022 to 2540. [2021-08-12 19:22:33,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2540 states, 2539 states have (on average 4.301693580149665) internal successors, (10922), 2539 states have internal predecessors, (10922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:33,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2540 states to 2540 states and 10922 transitions. [2021-08-12 19:22:33,408 INFO L78 Accepts]: Start accepts. Automaton has 2540 states and 10922 transitions. Word has length 29 [2021-08-12 19:22:33,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:33,408 INFO L482 AbstractCegarLoop]: Abstraction has 2540 states and 10922 transitions. [2021-08-12 19:22:33,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:33,408 INFO L276 IsEmpty]: Start isEmpty. Operand 2540 states and 10922 transitions. [2021-08-12 19:22:33,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:33,412 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:33,412 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:33,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:33,613 INFO L430 AbstractCegarLoop]: === Iteration 77 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:33,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:33,613 INFO L82 PathProgramCache]: Analyzing trace with hash -364239170, now seen corresponding path program 3 times [2021-08-12 19:22:33,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:33,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840911668] [2021-08-12 19:22:33,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:33,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:33,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840911668] [2021-08-12 19:22:33,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840911668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:33,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871059132] [2021-08-12 19:22:33,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:33,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:22:33,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:33,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:33,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:33,842 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:33,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:22:33,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:22:33,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:33,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:33,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-08-12 19:22:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:33,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871059132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:33,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:33,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-12 19:22:33,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743279032] [2021-08-12 19:22:33,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:22:33,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:33,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:22:33,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:33,943 INFO L87 Difference]: Start difference. First operand 2540 states and 10922 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:35,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:35,724 INFO L93 Difference]: Finished difference Result 3597 states and 14871 transitions. [2021-08-12 19:22:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:22:35,725 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:35,734 INFO L225 Difference]: With dead ends: 3597 [2021-08-12 19:22:35,734 INFO L226 Difference]: Without dead ends: 3557 [2021-08-12 19:22:35,736 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 556.2ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:22:35,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2021-08-12 19:22:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2640. [2021-08-12 19:22:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 2639 states have (on average 4.297082228116711) internal successors, (11340), 2639 states have internal predecessors, (11340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:35,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 11340 transitions. [2021-08-12 19:22:35,955 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 11340 transitions. Word has length 29 [2021-08-12 19:22:35,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:35,956 INFO L482 AbstractCegarLoop]: Abstraction has 2640 states and 11340 transitions. [2021-08-12 19:22:35,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:35,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 11340 transitions. [2021-08-12 19:22:35,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:35,959 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:35,959 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:36,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-12 19:22:36,160 INFO L430 AbstractCegarLoop]: === Iteration 78 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:36,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:36,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1058115656, now seen corresponding path program 4 times [2021-08-12 19:22:36,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:36,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634545401] [2021-08-12 19:22:36,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:36,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:36,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634545401] [2021-08-12 19:22:36,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634545401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:36,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932746695] [2021-08-12 19:22:36,272 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 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 [2021-08-12 19:22:36,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:22:36,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:36,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:36,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:36,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:22:36,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:22:36,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:36,376 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:36,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-08-12 19:22:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:36,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932746695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:36,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:36,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-12 19:22:36,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656218378] [2021-08-12 19:22:36,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:22:36,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:36,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:22:36,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:22:36,409 INFO L87 Difference]: Start difference. First operand 2640 states and 11340 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:37,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:37,594 INFO L93 Difference]: Finished difference Result 3229 states and 13610 transitions. [2021-08-12 19:22:37,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:22:37,595 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:37,603 INFO L225 Difference]: With dead ends: 3229 [2021-08-12 19:22:37,603 INFO L226 Difference]: Without dead ends: 3196 [2021-08-12 19:22:37,603 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:22:37,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2021-08-12 19:22:37,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2492. [2021-08-12 19:22:37,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 2491 states have (on average 4.308711360899237) internal successors, (10733), 2491 states have internal predecessors, (10733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:37,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 10733 transitions. [2021-08-12 19:22:37,825 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 10733 transitions. Word has length 29 [2021-08-12 19:22:37,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:37,825 INFO L482 AbstractCegarLoop]: Abstraction has 2492 states and 10733 transitions. [2021-08-12 19:22:37,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 10733 transitions. [2021-08-12 19:22:37,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:37,829 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:37,829 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:38,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:38,030 INFO L430 AbstractCegarLoop]: === Iteration 79 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:38,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:38,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1004214994, now seen corresponding path program 6 times [2021-08-12 19:22:38,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:38,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542603429] [2021-08-12 19:22:38,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:38,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:38,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542603429] [2021-08-12 19:22:38,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542603429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:38,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138141238] [2021-08-12 19:22:38,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:38,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:22:38,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:38,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:22:38,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:38,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:38,243 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 [2021-08-12 19:22:38,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:22:38,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:38,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:38,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-08-12 19:22:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:38,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138141238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:38,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:38,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-12 19:22:38,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696511844] [2021-08-12 19:22:38,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 19:22:38,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:38,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 19:22:38,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:22:38,362 INFO L87 Difference]: Start difference. First operand 2492 states and 10733 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:40,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:40,147 INFO L93 Difference]: Finished difference Result 3192 states and 13410 transitions. [2021-08-12 19:22:40,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:22:40,148 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:40,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:40,156 INFO L225 Difference]: With dead ends: 3192 [2021-08-12 19:22:40,156 INFO L226 Difference]: Without dead ends: 3171 [2021-08-12 19:22:40,157 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 722.3ms TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:22:40,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3171 states. [2021-08-12 19:22:40,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3171 to 2585. [2021-08-12 19:22:40,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2585 states, 2584 states have (on average 4.312693498452012) internal successors, (11144), 2584 states have internal predecessors, (11144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:40,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 11144 transitions. [2021-08-12 19:22:40,382 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 11144 transitions. Word has length 29 [2021-08-12 19:22:40,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:40,382 INFO L482 AbstractCegarLoop]: Abstraction has 2585 states and 11144 transitions. [2021-08-12 19:22:40,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:40,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 11144 transitions. [2021-08-12 19:22:40,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:40,386 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:40,386 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:40,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:40,586 INFO L430 AbstractCegarLoop]: === Iteration 80 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:40,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1987479696, now seen corresponding path program 7 times [2021-08-12 19:22:40,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:40,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401679606] [2021-08-12 19:22:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:40,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:40,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401679606] [2021-08-12 19:22:40,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401679606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:40,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382318261] [2021-08-12 19:22:40,725 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 [2021-08-12 19:22:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:40,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:40,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:40,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:22:40,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-08-12 19:22:40,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:22:40,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:40,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:40,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-08-12 19:22:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:40,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382318261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:40,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:40,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-08-12 19:22:40,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523994106] [2021-08-12 19:22:40,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:22:40,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:40,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:22:40,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:22:40,899 INFO L87 Difference]: Start difference. First operand 2585 states and 11144 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:42,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:42,025 INFO L93 Difference]: Finished difference Result 3054 states and 12854 transitions. [2021-08-12 19:22:42,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:22:42,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:42,034 INFO L225 Difference]: With dead ends: 3054 [2021-08-12 19:22:42,034 INFO L226 Difference]: Without dead ends: 3037 [2021-08-12 19:22:42,034 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:42,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2021-08-12 19:22:42,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 2604. [2021-08-12 19:22:42,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2604 states, 2603 states have (on average 4.303111794083749) internal successors, (11201), 2603 states have internal predecessors, (11201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2604 states to 2604 states and 11201 transitions. [2021-08-12 19:22:42,267 INFO L78 Accepts]: Start accepts. Automaton has 2604 states and 11201 transitions. Word has length 29 [2021-08-12 19:22:42,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:42,267 INFO L482 AbstractCegarLoop]: Abstraction has 2604 states and 11201 transitions. [2021-08-12 19:22:42,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:42,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2604 states and 11201 transitions. [2021-08-12 19:22:42,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:42,271 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:42,271 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:42,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-12 19:22:42,472 INFO L430 AbstractCegarLoop]: === Iteration 81 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:42,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:42,472 INFO L82 PathProgramCache]: Analyzing trace with hash 639094158, now seen corresponding path program 8 times [2021-08-12 19:22:42,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:42,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059431082] [2021-08-12 19:22:42,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:42,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:42,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:42,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059431082] [2021-08-12 19:22:42,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059431082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:42,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571925097] [2021-08-12 19:22:42,616 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 [2021-08-12 19:22:42,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:22:42,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:42,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:42,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:42,727 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:42,727 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 [2021-08-12 19:22:42,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:22:42,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:42,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:42,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:22:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:42,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571925097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:42,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:42,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-12 19:22:42,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790867808] [2021-08-12 19:22:42,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:22:42,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:42,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:22:42,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:42,867 INFO L87 Difference]: Start difference. First operand 2604 states and 11201 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:44,413 INFO L93 Difference]: Finished difference Result 2958 states and 12438 transitions. [2021-08-12 19:22:44,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:22:44,417 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:44,426 INFO L225 Difference]: With dead ends: 2958 [2021-08-12 19:22:44,426 INFO L226 Difference]: Without dead ends: 2942 [2021-08-12 19:22:44,426 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 583.6ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:22:44,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2021-08-12 19:22:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 2597. [2021-08-12 19:22:44,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2596 states have (on average 4.305469953775039) internal successors, (11177), 2596 states have internal predecessors, (11177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:44,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 11177 transitions. [2021-08-12 19:22:44,662 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 11177 transitions. Word has length 29 [2021-08-12 19:22:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:44,662 INFO L482 AbstractCegarLoop]: Abstraction has 2597 states and 11177 transitions. [2021-08-12 19:22:44,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:44,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 11177 transitions. [2021-08-12 19:22:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:44,666 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:44,666 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:44,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:44,866 INFO L430 AbstractCegarLoop]: === Iteration 82 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:44,867 INFO L82 PathProgramCache]: Analyzing trace with hash -2040866216, now seen corresponding path program 9 times [2021-08-12 19:22:44,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:44,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242359950] [2021-08-12 19:22:44,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:45,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:45,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242359950] [2021-08-12 19:22:45,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242359950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:45,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021430582] [2021-08-12 19:22:45,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:45,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:22:45,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:45,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:22:45,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:45,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:45,088 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 [2021-08-12 19:22:45,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:22:45,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:45,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:45,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-08-12 19:22:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:45,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021430582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:45,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:45,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-12 19:22:45,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705211566] [2021-08-12 19:22:45,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:22:45,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:45,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:22:45,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:45,192 INFO L87 Difference]: Start difference. First operand 2597 states and 11177 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:46,802 INFO L93 Difference]: Finished difference Result 3121 states and 13038 transitions. [2021-08-12 19:22:46,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:22:46,803 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:46,811 INFO L225 Difference]: With dead ends: 3121 [2021-08-12 19:22:46,811 INFO L226 Difference]: Without dead ends: 3096 [2021-08-12 19:22:46,812 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 500.3ms TimeCoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:22:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-08-12 19:22:47,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 2534. [2021-08-12 19:22:47,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 4.3024082116067905) internal successors, (10898), 2533 states have internal predecessors, (10898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:47,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 10898 transitions. [2021-08-12 19:22:47,045 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 10898 transitions. Word has length 29 [2021-08-12 19:22:47,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:47,046 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 10898 transitions. [2021-08-12 19:22:47,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:47,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 10898 transitions. [2021-08-12 19:22:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:47,049 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:47,049 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:47,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:47,250 INFO L430 AbstractCegarLoop]: === Iteration 83 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:47,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:47,250 INFO L82 PathProgramCache]: Analyzing trace with hash 548011288, now seen corresponding path program 10 times [2021-08-12 19:22:47,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:47,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822688153] [2021-08-12 19:22:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:47,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:47,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822688153] [2021-08-12 19:22:47,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822688153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:47,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797134792] [2021-08-12 19:22:47,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:47,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:22:47,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:47,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:47,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:47,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:22:47,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:22:47,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:47,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:47,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-08-12 19:22:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:47,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797134792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:47,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:47,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-12 19:22:47,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324923615] [2021-08-12 19:22:47,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:22:47,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:47,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:22:47,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:22:47,583 INFO L87 Difference]: Start difference. First operand 2534 states and 10898 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:48,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:48,513 INFO L93 Difference]: Finished difference Result 2645 states and 11268 transitions. [2021-08-12 19:22:48,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:22:48,513 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:48,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:48,520 INFO L225 Difference]: With dead ends: 2645 [2021-08-12 19:22:48,520 INFO L226 Difference]: Without dead ends: 2628 [2021-08-12 19:22:48,521 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:22:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-08-12 19:22:48,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 2534. [2021-08-12 19:22:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2534 states, 2533 states have (on average 4.3024082116067905) internal successors, (10898), 2533 states have internal predecessors, (10898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2534 states to 2534 states and 10898 transitions. [2021-08-12 19:22:48,760 INFO L78 Accepts]: Start accepts. Automaton has 2534 states and 10898 transitions. Word has length 29 [2021-08-12 19:22:48,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:48,760 INFO L482 AbstractCegarLoop]: Abstraction has 2534 states and 10898 transitions. [2021-08-12 19:22:48,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:48,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2534 states and 10898 transitions. [2021-08-12 19:22:48,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:48,764 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:48,764 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:48,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:48,964 INFO L430 AbstractCegarLoop]: === Iteration 84 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:48,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:48,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1085301608, now seen corresponding path program 11 times [2021-08-12 19:22:48,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:48,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016981867] [2021-08-12 19:22:48,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:48,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:49,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:49,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016981867] [2021-08-12 19:22:49,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016981867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:49,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480016421] [2021-08-12 19:22:49,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:22:49,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:22:49,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:49,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:49,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:49,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:22:49,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:22:49,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:49,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:49,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-08-12 19:22:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:49,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480016421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:49,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:49,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-08-12 19:22:49,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800435471] [2021-08-12 19:22:49,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:22:49,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:49,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:22:49,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:22:49,241 INFO L87 Difference]: Start difference. First operand 2534 states and 10898 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:50,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:50,334 INFO L93 Difference]: Finished difference Result 2988 states and 12680 transitions. [2021-08-12 19:22:50,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:22:50,334 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:50,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:50,343 INFO L225 Difference]: With dead ends: 2988 [2021-08-12 19:22:50,343 INFO L226 Difference]: Without dead ends: 2972 [2021-08-12 19:22:50,344 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 211.2ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:50,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-08-12 19:22:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2522. [2021-08-12 19:22:50,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 4.308607695358985) internal successors, (10862), 2521 states have internal predecessors, (10862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:50,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 10862 transitions. [2021-08-12 19:22:50,601 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 10862 transitions. Word has length 29 [2021-08-12 19:22:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:50,601 INFO L482 AbstractCegarLoop]: Abstraction has 2522 states and 10862 transitions. [2021-08-12 19:22:50,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:50,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 10862 transitions. [2021-08-12 19:22:50,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:50,605 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:50,605 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:50,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:50,806 INFO L430 AbstractCegarLoop]: === Iteration 85 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:50,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:50,806 INFO L82 PathProgramCache]: Analyzing trace with hash -2051190826, now seen corresponding path program 12 times [2021-08-12 19:22:50,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:50,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618787192] [2021-08-12 19:22:50,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:50,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:50,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618787192] [2021-08-12 19:22:50,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618787192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:50,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692322469] [2021-08-12 19:22:50,952 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 [2021-08-12 19:22:50,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:22:50,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:50,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:50,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:51,043 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:51,044 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 [2021-08-12 19:22:51,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:22:51,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:51,054 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:51,054 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:22:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:51,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692322469] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:51,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:51,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-12 19:22:51,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528287733] [2021-08-12 19:22:51,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 19:22:51,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:51,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 19:22:51,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:22:51,177 INFO L87 Difference]: Start difference. First operand 2522 states and 10862 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:52,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:52,994 INFO L93 Difference]: Finished difference Result 3051 states and 12767 transitions. [2021-08-12 19:22:52,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 19:22:52,995 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:53,003 INFO L225 Difference]: With dead ends: 3051 [2021-08-12 19:22:53,003 INFO L226 Difference]: Without dead ends: 3030 [2021-08-12 19:22:53,003 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 771.9ms TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 19:22:53,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-08-12 19:22:53,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2612. [2021-08-12 19:22:53,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2612 states, 2611 states have (on average 4.316353887399464) internal successors, (11270), 2611 states have internal predecessors, (11270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2612 states to 2612 states and 11270 transitions. [2021-08-12 19:22:53,256 INFO L78 Accepts]: Start accepts. Automaton has 2612 states and 11270 transitions. Word has length 29 [2021-08-12 19:22:53,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:53,256 INFO L482 AbstractCegarLoop]: Abstraction has 2612 states and 11270 transitions. [2021-08-12 19:22:53,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:53,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2612 states and 11270 transitions. [2021-08-12 19:22:53,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:53,260 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:53,260 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:53,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:53,461 INFO L430 AbstractCegarLoop]: === Iteration 86 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:53,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:53,461 INFO L82 PathProgramCache]: Analyzing trace with hash -747918220, now seen corresponding path program 13 times [2021-08-12 19:22:53,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:53,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747490162] [2021-08-12 19:22:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:53,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:53,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747490162] [2021-08-12 19:22:53,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747490162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:53,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559075217] [2021-08-12 19:22:53,595 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 [2021-08-12 19:22:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:53,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:53,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:53,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:22:53,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:22:53,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:53,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:53,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-08-12 19:22:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:53,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559075217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:53,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:53,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2021-08-12 19:22:53,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032193685] [2021-08-12 19:22:53,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:22:53,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:53,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:22:53,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:22:53,736 INFO L87 Difference]: Start difference. First operand 2612 states and 11270 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:54,904 INFO L93 Difference]: Finished difference Result 3084 states and 13052 transitions. [2021-08-12 19:22:54,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:22:54,904 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:54,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:54,912 INFO L225 Difference]: With dead ends: 3084 [2021-08-12 19:22:54,913 INFO L226 Difference]: Without dead ends: 3067 [2021-08-12 19:22:54,913 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:54,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3067 states. [2021-08-12 19:22:55,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3067 to 2631. [2021-08-12 19:22:55,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2631 states, 2630 states have (on average 4.30722433460076) internal successors, (11328), 2630 states have internal predecessors, (11328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2631 states to 2631 states and 11328 transitions. [2021-08-12 19:22:55,161 INFO L78 Accepts]: Start accepts. Automaton has 2631 states and 11328 transitions. Word has length 29 [2021-08-12 19:22:55,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:55,161 INFO L482 AbstractCegarLoop]: Abstraction has 2631 states and 11328 transitions. [2021-08-12 19:22:55,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:55,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2631 states and 11328 transitions. [2021-08-12 19:22:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:55,165 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:55,165 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:55,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:55,365 INFO L430 AbstractCegarLoop]: === Iteration 87 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:55,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:55,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1878655634, now seen corresponding path program 14 times [2021-08-12 19:22:55,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:55,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451162530] [2021-08-12 19:22:55,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:55,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:55,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451162530] [2021-08-12 19:22:55,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451162530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:55,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121851164] [2021-08-12 19:22:55,502 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 [2021-08-12 19:22:55,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:22:55,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:55,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:55,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:55,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:55,597 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 [2021-08-12 19:22:55,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:22:55,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:55,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:55,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:22:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:55,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121851164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:55,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:55,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-12 19:22:55,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197782975] [2021-08-12 19:22:55,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:22:55,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:55,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:22:55,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:55,714 INFO L87 Difference]: Start difference. First operand 2631 states and 11328 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:57,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:57,434 INFO L93 Difference]: Finished difference Result 3046 states and 12760 transitions. [2021-08-12 19:22:57,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:22:57,434 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:57,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:57,442 INFO L225 Difference]: With dead ends: 3046 [2021-08-12 19:22:57,442 INFO L226 Difference]: Without dead ends: 3030 [2021-08-12 19:22:57,442 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 632.6ms TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2021-08-12 19:22:57,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-08-12 19:22:57,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2624. [2021-08-12 19:22:57,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 4.309569195577583) internal successors, (11304), 2623 states have internal predecessors, (11304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 11304 transitions. [2021-08-12 19:22:57,690 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 11304 transitions. Word has length 29 [2021-08-12 19:22:57,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:22:57,690 INFO L482 AbstractCegarLoop]: Abstraction has 2624 states and 11304 transitions. [2021-08-12 19:22:57,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 11304 transitions. [2021-08-12 19:22:57,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:22:57,694 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:22:57,694 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:22:57,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-08-12 19:22:57,895 INFO L430 AbstractCegarLoop]: === Iteration 88 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:22:57,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:22:57,895 INFO L82 PathProgramCache]: Analyzing trace with hash -801304740, now seen corresponding path program 15 times [2021-08-12 19:22:57,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:22:57,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052751409] [2021-08-12 19:22:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:22:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:22:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:58,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:22:58,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052751409] [2021-08-12 19:22:58,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052751409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:58,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157715984] [2021-08-12 19:22:58,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:22:58,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:22:58,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:22:58,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:22:58,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:22:58,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:58,117 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 [2021-08-12 19:22:58,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:22:58,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:22:58,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:22:58,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:22:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:22:58,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157715984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:22:58,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:22:58,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-12 19:22:58,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674878313] [2021-08-12 19:22:58,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:22:58,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:22:58,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:22:58,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:22:58,262 INFO L87 Difference]: Start difference. First operand 2624 states and 11304 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:22:59,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:22:59,839 INFO L93 Difference]: Finished difference Result 3014 states and 12689 transitions. [2021-08-12 19:22:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:22:59,840 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:22:59,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:22:59,848 INFO L225 Difference]: With dead ends: 3014 [2021-08-12 19:22:59,848 INFO L226 Difference]: Without dead ends: 2989 [2021-08-12 19:22:59,849 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 557.9ms TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:22:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2989 states. [2021-08-12 19:23:00,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2989 to 2552. [2021-08-12 19:23:00,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 4.31125049000392) internal successors, (10998), 2551 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:00,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 10998 transitions. [2021-08-12 19:23:00,101 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 10998 transitions. Word has length 29 [2021-08-12 19:23:00,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:00,101 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 10998 transitions. [2021-08-12 19:23:00,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:00,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 10998 transitions. [2021-08-12 19:23:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:00,105 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:00,105 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:00,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:00,305 INFO L430 AbstractCegarLoop]: === Iteration 89 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:00,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:00,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1337845358, now seen corresponding path program 16 times [2021-08-12 19:23:00,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:00,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648820979] [2021-08-12 19:23:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:00,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:00,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648820979] [2021-08-12 19:23:00,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648820979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:00,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020780644] [2021-08-12 19:23:00,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:00,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:23:00,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:00,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:00,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:00,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:23:00,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:23:00,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:00,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:00,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-08-12 19:23:00,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:00,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020780644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:00,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:00,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-08-12 19:23:00,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250168798] [2021-08-12 19:23:00,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 19:23:00,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:00,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 19:23:00,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-12 19:23:00,608 INFO L87 Difference]: Start difference. First operand 2552 states and 10998 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:01,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:01,591 INFO L93 Difference]: Finished difference Result 2689 states and 11481 transitions. [2021-08-12 19:23:01,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:23:01,592 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:01,600 INFO L225 Difference]: With dead ends: 2689 [2021-08-12 19:23:01,600 INFO L226 Difference]: Without dead ends: 2668 [2021-08-12 19:23:01,600 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:23:01,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2021-08-12 19:23:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2552. [2021-08-12 19:23:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2552 states, 2551 states have (on average 4.31125049000392) internal successors, (10998), 2551 states have internal predecessors, (10998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:01,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2552 states to 2552 states and 10998 transitions. [2021-08-12 19:23:01,852 INFO L78 Accepts]: Start accepts. Automaton has 2552 states and 10998 transitions. Word has length 29 [2021-08-12 19:23:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:01,852 INFO L482 AbstractCegarLoop]: Abstraction has 2552 states and 10998 transitions. [2021-08-12 19:23:01,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2552 states and 10998 transitions. [2021-08-12 19:23:01,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:01,856 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:01,856 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:02,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-12 19:23:02,057 INFO L430 AbstractCegarLoop]: === Iteration 90 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:02,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:02,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1901442782, now seen corresponding path program 17 times [2021-08-12 19:23:02,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:02,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075267502] [2021-08-12 19:23:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:02,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:02,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075267502] [2021-08-12 19:23:02,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075267502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:02,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889909944] [2021-08-12 19:23:02,189 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:02,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:23:02,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:02,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-12 19:23:02,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:02,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-08-12 19:23:02,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:23:02,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:02,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:02,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:19 [2021-08-12 19:23:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:02,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889909944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:02,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:02,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-12 19:23:02,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983575871] [2021-08-12 19:23:02,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:23:02,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:02,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:23:02,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:23:02,370 INFO L87 Difference]: Start difference. First operand 2552 states and 10998 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:03,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:03,655 INFO L93 Difference]: Finished difference Result 3041 states and 12855 transitions. [2021-08-12 19:23:03,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 19:23:03,655 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:03,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:03,663 INFO L225 Difference]: With dead ends: 3041 [2021-08-12 19:23:03,663 INFO L226 Difference]: Without dead ends: 3016 [2021-08-12 19:23:03,664 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 233.3ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:23:03,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2021-08-12 19:23:03,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 2522. [2021-08-12 19:23:03,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2522 states, 2521 states have (on average 4.308607695358985) internal successors, (10862), 2521 states have internal predecessors, (10862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2522 states to 2522 states and 10862 transitions. [2021-08-12 19:23:03,912 INFO L78 Accepts]: Start accepts. Automaton has 2522 states and 10862 transitions. Word has length 29 [2021-08-12 19:23:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:03,912 INFO L482 AbstractCegarLoop]: Abstraction has 2522 states and 10862 transitions. [2021-08-12 19:23:03,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:03,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2522 states and 10862 transitions. [2021-08-12 19:23:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:03,916 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:03,916 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:04,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-12 19:23:04,116 INFO L430 AbstractCegarLoop]: === Iteration 91 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:04,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:04,117 INFO L82 PathProgramCache]: Analyzing trace with hash -865854478, now seen corresponding path program 5 times [2021-08-12 19:23:04,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:04,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893128588] [2021-08-12 19:23:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:04,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:04,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893128588] [2021-08-12 19:23:04,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893128588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:04,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371102983] [2021-08-12 19:23:04,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:04,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:23:04,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:04,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:04,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:04,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:23:04,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:23:04,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:04,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:04,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-08-12 19:23:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:04,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371102983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:04,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:04,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-12 19:23:04,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578332785] [2021-08-12 19:23:04,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:23:04,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:04,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:23:04,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:23:04,420 INFO L87 Difference]: Start difference. First operand 2522 states and 10862 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:05,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:05,837 INFO L93 Difference]: Finished difference Result 3131 states and 13234 transitions. [2021-08-12 19:23:05,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:23:05,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:05,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:05,846 INFO L225 Difference]: With dead ends: 3131 [2021-08-12 19:23:05,846 INFO L226 Difference]: Without dead ends: 3110 [2021-08-12 19:23:05,846 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:23:05,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2021-08-12 19:23:06,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2661. [2021-08-12 19:23:06,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2660 states have (on average 4.300375939849624) internal successors, (11439), 2660 states have internal predecessors, (11439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:06,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 11439 transitions. [2021-08-12 19:23:06,108 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 11439 transitions. Word has length 29 [2021-08-12 19:23:06,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:06,108 INFO L482 AbstractCegarLoop]: Abstraction has 2661 states and 11439 transitions. [2021-08-12 19:23:06,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:06,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 11439 transitions. [2021-08-12 19:23:06,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:06,112 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:06,112 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:06,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:06,313 INFO L430 AbstractCegarLoop]: === Iteration 92 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:06,313 INFO L82 PathProgramCache]: Analyzing trace with hash 556500348, now seen corresponding path program 6 times [2021-08-12 19:23:06,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:06,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106518217] [2021-08-12 19:23:06,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:06,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:06,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106518217] [2021-08-12 19:23:06,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106518217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:06,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637610835] [2021-08-12 19:23:06,445 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 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 [2021-08-12 19:23:06,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:23:06,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:06,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:23:06,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:06,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:06,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-08-12 19:23:06,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:23:06,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:06,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:06,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-08-12 19:23:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:06,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637610835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:06,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:06,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-12 19:23:06,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11263910] [2021-08-12 19:23:06,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:23:06,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:06,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:23:06,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:23:06,637 INFO L87 Difference]: Start difference. First operand 2661 states and 11439 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:08,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:08,434 INFO L93 Difference]: Finished difference Result 3482 states and 14548 transitions. [2021-08-12 19:23:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:23:08,434 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:08,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:08,443 INFO L225 Difference]: With dead ends: 3482 [2021-08-12 19:23:08,443 INFO L226 Difference]: Without dead ends: 3449 [2021-08-12 19:23:08,444 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 472.6ms TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2021-08-12 19:23:08,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3449 states. [2021-08-12 19:23:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3449 to 2561. [2021-08-12 19:23:08,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 4.305078125) internal successors, (11021), 2560 states have internal predecessors, (11021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 11021 transitions. [2021-08-12 19:23:08,711 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 11021 transitions. Word has length 29 [2021-08-12 19:23:08,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:08,711 INFO L482 AbstractCegarLoop]: Abstraction has 2561 states and 11021 transitions. [2021-08-12 19:23:08,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:08,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 11021 transitions. [2021-08-12 19:23:08,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:08,715 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:08,715 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:08,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:08,915 INFO L430 AbstractCegarLoop]: === Iteration 93 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:08,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:08,916 INFO L82 PathProgramCache]: Analyzing trace with hash -2106272904, now seen corresponding path program 7 times [2021-08-12 19:23:08,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:08,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578518011] [2021-08-12 19:23:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:09,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:09,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578518011] [2021-08-12 19:23:09,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578518011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:09,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758375505] [2021-08-12 19:23:09,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:09,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:09,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:09,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:23:09,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:23:09,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:09,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:09,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-08-12 19:23:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:09,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758375505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:09,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:09,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:23:09,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907090686] [2021-08-12 19:23:09,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:23:09,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:09,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:23:09,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:23:09,241 INFO L87 Difference]: Start difference. First operand 2561 states and 11021 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:10,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:10,363 INFO L93 Difference]: Finished difference Result 2681 states and 11425 transitions. [2021-08-12 19:23:10,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:23:10,363 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:10,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:10,371 INFO L225 Difference]: With dead ends: 2681 [2021-08-12 19:23:10,371 INFO L226 Difference]: Without dead ends: 2664 [2021-08-12 19:23:10,371 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 276.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:23:10,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-08-12 19:23:10,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2537. [2021-08-12 19:23:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2537 states, 2536 states have (on average 4.306782334384858) internal successors, (10922), 2536 states have internal predecessors, (10922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2537 states to 2537 states and 10922 transitions. [2021-08-12 19:23:10,632 INFO L78 Accepts]: Start accepts. Automaton has 2537 states and 10922 transitions. Word has length 29 [2021-08-12 19:23:10,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:10,632 INFO L482 AbstractCegarLoop]: Abstraction has 2537 states and 10922 transitions. [2021-08-12 19:23:10,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:10,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2537 states and 10922 transitions. [2021-08-12 19:23:10,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:10,636 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:10,636 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:10,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:10,837 INFO L430 AbstractCegarLoop]: === Iteration 94 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:10,837 INFO L82 PathProgramCache]: Analyzing trace with hash 382055414, now seen corresponding path program 8 times [2021-08-12 19:23:10,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:10,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932118331] [2021-08-12 19:23:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:10,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:10,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932118331] [2021-08-12 19:23:10,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932118331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:10,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500687707] [2021-08-12 19:23:10,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:11,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:23:11,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:11,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:11,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:11,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:11,063 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 [2021-08-12 19:23:11,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:23:11,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:11,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:11,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:23:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:11,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500687707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:11,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:11,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-12 19:23:11,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754183219] [2021-08-12 19:23:11,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:23:11,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:11,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:23:11,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:23:11,203 INFO L87 Difference]: Start difference. First operand 2537 states and 10922 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:13,427 INFO L93 Difference]: Finished difference Result 3446 states and 14152 transitions. [2021-08-12 19:23:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:23:13,427 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:13,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:13,437 INFO L225 Difference]: With dead ends: 3446 [2021-08-12 19:23:13,437 INFO L226 Difference]: Without dead ends: 3273 [2021-08-12 19:23:13,438 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 913.8ms TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:23:13,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2021-08-12 19:23:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2685. [2021-08-12 19:23:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2684 states have (on average 4.2831594634873325) internal successors, (11496), 2684 states have internal predecessors, (11496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:13,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 11496 transitions. [2021-08-12 19:23:13,738 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 11496 transitions. Word has length 29 [2021-08-12 19:23:13,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:13,738 INFO L482 AbstractCegarLoop]: Abstraction has 2685 states and 11496 transitions. [2021-08-12 19:23:13,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:13,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 11496 transitions. [2021-08-12 19:23:13,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:13,742 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:13,742 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:13,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-08-12 19:23:13,945 INFO L430 AbstractCegarLoop]: === Iteration 95 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:13,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:13,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1804410240, now seen corresponding path program 9 times [2021-08-12 19:23:13,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:13,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922402052] [2021-08-12 19:23:13,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:14,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:14,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922402052] [2021-08-12 19:23:14,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922402052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:14,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509147986] [2021-08-12 19:23:14,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:14,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:23:14,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:14,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-12 19:23:14,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:14,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:14,186 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 [2021-08-12 19:23:14,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:23:14,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:14,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:14,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-08-12 19:23:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:14,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509147986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:14,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:14,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-12 19:23:14,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049997747] [2021-08-12 19:23:14,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:23:14,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:14,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:23:14,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:23:14,296 INFO L87 Difference]: Start difference. First operand 2685 states and 11496 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:16,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:16,089 INFO L93 Difference]: Finished difference Result 3482 states and 14562 transitions. [2021-08-12 19:23:16,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:23:16,090 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:16,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:16,099 INFO L225 Difference]: With dead ends: 3482 [2021-08-12 19:23:16,099 INFO L226 Difference]: Without dead ends: 3407 [2021-08-12 19:23:16,099 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 454.5ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:23:16,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-08-12 19:23:16,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 2621. [2021-08-12 19:23:16,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2621 states, 2620 states have (on average 4.307251908396947) internal successors, (11285), 2620 states have internal predecessors, (11285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2621 states to 2621 states and 11285 transitions. [2021-08-12 19:23:16,377 INFO L78 Accepts]: Start accepts. Automaton has 2621 states and 11285 transitions. Word has length 29 [2021-08-12 19:23:16,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:16,377 INFO L482 AbstractCegarLoop]: Abstraction has 2621 states and 11285 transitions. [2021-08-12 19:23:16,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:16,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2621 states and 11285 transitions. [2021-08-12 19:23:16,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:16,381 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:16,381 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:16,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:16,581 INFO L430 AbstractCegarLoop]: === Iteration 96 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:16,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:16,582 INFO L82 PathProgramCache]: Analyzing trace with hash 220727986, now seen corresponding path program 10 times [2021-08-12 19:23:16,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:16,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39606510] [2021-08-12 19:23:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:16,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:16,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39606510] [2021-08-12 19:23:16,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39606510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:16,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921539537] [2021-08-12 19:23:16,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:16,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:23:16,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:16,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:16,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:16,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-12 19:23:16,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:23:16,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:16,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:16,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-08-12 19:23:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:16,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921539537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:16,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:16,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-12 19:23:16,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983277992] [2021-08-12 19:23:16,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:23:16,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:16,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:23:16,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:23:16,859 INFO L87 Difference]: Start difference. First operand 2621 states and 11285 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:17,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:17,953 INFO L93 Difference]: Finished difference Result 2767 states and 11777 transitions. [2021-08-12 19:23:17,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:23:17,953 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:17,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:17,963 INFO L225 Difference]: With dead ends: 2767 [2021-08-12 19:23:17,964 INFO L226 Difference]: Without dead ends: 2746 [2021-08-12 19:23:17,964 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 211.0ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:23:17,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-08-12 19:23:18,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2618. [2021-08-12 19:23:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2618 states, 2617 states have (on average 4.30875047764616) internal successors, (11276), 2617 states have internal predecessors, (11276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2618 states to 2618 states and 11276 transitions. [2021-08-12 19:23:18,263 INFO L78 Accepts]: Start accepts. Automaton has 2618 states and 11276 transitions. Word has length 29 [2021-08-12 19:23:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:18,263 INFO L482 AbstractCegarLoop]: Abstraction has 2618 states and 11276 transitions. [2021-08-12 19:23:18,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2618 states and 11276 transitions. [2021-08-12 19:23:18,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:18,267 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:18,267 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:18,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-12 19:23:18,467 INFO L430 AbstractCegarLoop]: === Iteration 97 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:18,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:18,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1672937528, now seen corresponding path program 18 times [2021-08-12 19:23:18,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:18,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770830999] [2021-08-12 19:23:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:18,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:18,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770830999] [2021-08-12 19:23:18,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770830999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:18,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182606114] [2021-08-12 19:23:18,555 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:23:18,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:23:18,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:18,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:18,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:18,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:18,661 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 [2021-08-12 19:23:18,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:23:18,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:18,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:18,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:23:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:18,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182606114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:18,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:18,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-08-12 19:23:18,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001902323] [2021-08-12 19:23:18,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:23:18,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:18,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:23:18,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:23:18,799 INFO L87 Difference]: Start difference. First operand 2618 states and 11276 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:20,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:20,382 INFO L93 Difference]: Finished difference Result 3193 states and 13492 transitions. [2021-08-12 19:23:20,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:23:20,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:20,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:20,391 INFO L225 Difference]: With dead ends: 3193 [2021-08-12 19:23:20,391 INFO L226 Difference]: Without dead ends: 3172 [2021-08-12 19:23:20,391 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 409.8ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:23:20,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3172 states. [2021-08-12 19:23:20,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3172 to 2734. [2021-08-12 19:23:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2734 states, 2733 states have (on average 4.304427369191365) internal successors, (11764), 2733 states have internal predecessors, (11764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2734 states to 2734 states and 11764 transitions. [2021-08-12 19:23:20,683 INFO L78 Accepts]: Start accepts. Automaton has 2734 states and 11764 transitions. Word has length 29 [2021-08-12 19:23:20,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:20,683 INFO L482 AbstractCegarLoop]: Abstraction has 2734 states and 11764 transitions. [2021-08-12 19:23:20,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:20,683 INFO L276 IsEmpty]: Start isEmpty. Operand 2734 states and 11764 transitions. [2021-08-12 19:23:20,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:20,687 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:20,687 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:20,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:20,888 INFO L430 AbstractCegarLoop]: === Iteration 98 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:20,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:20,888 INFO L82 PathProgramCache]: Analyzing trace with hash -369664922, now seen corresponding path program 19 times [2021-08-12 19:23:20,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:20,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436480460] [2021-08-12 19:23:20,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:20,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:20,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436480460] [2021-08-12 19:23:20,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436480460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:20,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301350160] [2021-08-12 19:23:20,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:20,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:23:20,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:21,053 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 11 treesize of output 7 [2021-08-12 19:23:21,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:23:21,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:21,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:21,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-08-12 19:23:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:21,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301350160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:21,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:21,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-08-12 19:23:21,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535373717] [2021-08-12 19:23:21,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:23:21,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:21,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:23:21,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:23:21,153 INFO L87 Difference]: Start difference. First operand 2734 states and 11764 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:22,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:22,463 INFO L93 Difference]: Finished difference Result 3231 states and 13491 transitions. [2021-08-12 19:23:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 19:23:22,464 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:22,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:22,472 INFO L225 Difference]: With dead ends: 3231 [2021-08-12 19:23:22,472 INFO L226 Difference]: Without dead ends: 3030 [2021-08-12 19:23:22,473 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 186.9ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:23:22,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-08-12 19:23:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2689. [2021-08-12 19:23:22,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2689 states, 2688 states have (on average 4.312127976190476) internal successors, (11591), 2688 states have internal predecessors, (11591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:22,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2689 states to 2689 states and 11591 transitions. [2021-08-12 19:23:22,791 INFO L78 Accepts]: Start accepts. Automaton has 2689 states and 11591 transitions. Word has length 29 [2021-08-12 19:23:22,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:22,791 INFO L482 AbstractCegarLoop]: Abstraction has 2689 states and 11591 transitions. [2021-08-12 19:23:22,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:22,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2689 states and 11591 transitions. [2021-08-12 19:23:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:22,795 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:22,795 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:22,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:22,996 INFO L430 AbstractCegarLoop]: === Iteration 99 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:22,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:22,996 INFO L82 PathProgramCache]: Analyzing trace with hash -2129141234, now seen corresponding path program 20 times [2021-08-12 19:23:22,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:22,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172839366] [2021-08-12 19:23:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:23,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:23,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:23,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172839366] [2021-08-12 19:23:23,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172839366] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:23,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187570237] [2021-08-12 19:23:23,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:23,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:23:23,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:23,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:23,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:23,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:23,183 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 [2021-08-12 19:23:23,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:23:23,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:23,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:23,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:23:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:23,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187570237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:23,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:23,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-08-12 19:23:23,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025242697] [2021-08-12 19:23:23,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:23:23,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:23,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:23:23,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:23:23,325 INFO L87 Difference]: Start difference. First operand 2689 states and 11591 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:24,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:24,821 INFO L93 Difference]: Finished difference Result 2858 states and 12153 transitions. [2021-08-12 19:23:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:23:24,822 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:24,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:24,830 INFO L225 Difference]: With dead ends: 2858 [2021-08-12 19:23:24,830 INFO L226 Difference]: Without dead ends: 2841 [2021-08-12 19:23:24,831 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 450.7ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:23:24,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2841 states. [2021-08-12 19:23:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2841 to 2686. [2021-08-12 19:23:25,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2686 states, 2685 states have (on average 4.313594040968343) internal successors, (11582), 2685 states have internal predecessors, (11582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2686 states to 2686 states and 11582 transitions. [2021-08-12 19:23:25,145 INFO L78 Accepts]: Start accepts. Automaton has 2686 states and 11582 transitions. Word has length 29 [2021-08-12 19:23:25,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:25,145 INFO L482 AbstractCegarLoop]: Abstraction has 2686 states and 11582 transitions. [2021-08-12 19:23:25,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:25,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2686 states and 11582 transitions. [2021-08-12 19:23:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:25,149 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:25,149 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:25,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-08-12 19:23:25,369 INFO L430 AbstractCegarLoop]: === Iteration 100 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:25,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:25,369 INFO L82 PathProgramCache]: Analyzing trace with hash -433376052, now seen corresponding path program 21 times [2021-08-12 19:23:25,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:25,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075472800] [2021-08-12 19:23:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:25,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:25,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075472800] [2021-08-12 19:23:25,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075472800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:25,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114191695] [2021-08-12 19:23:25,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:25,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:23:25,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:25,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 19:23:25,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:25,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:25,544 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 [2021-08-12 19:23:25,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:23:25,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:25,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:25,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-08-12 19:23:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:25,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114191695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:25,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:25,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-08-12 19:23:25,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107215264] [2021-08-12 19:23:25,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:23:25,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:25,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:23:25,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:23:25,654 INFO L87 Difference]: Start difference. First operand 2686 states and 11582 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:27,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:27,760 INFO L93 Difference]: Finished difference Result 3616 states and 15143 transitions. [2021-08-12 19:23:27,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:23:27,760 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:27,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:27,771 INFO L225 Difference]: With dead ends: 3616 [2021-08-12 19:23:27,771 INFO L226 Difference]: Without dead ends: 3595 [2021-08-12 19:23:27,771 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 447.3ms TimeCoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2021-08-12 19:23:27,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3595 states. [2021-08-12 19:23:28,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3595 to 2796. [2021-08-12 19:23:28,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 4.311985688729875) internal successors, (12052), 2795 states have internal predecessors, (12052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 12052 transitions. [2021-08-12 19:23:28,066 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 12052 transitions. Word has length 29 [2021-08-12 19:23:28,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:28,067 INFO L482 AbstractCegarLoop]: Abstraction has 2796 states and 12052 transitions. [2021-08-12 19:23:28,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 12052 transitions. [2021-08-12 19:23:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:28,071 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:28,071 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:28,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-12 19:23:28,271 INFO L430 AbstractCegarLoop]: === Iteration 101 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:28,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:28,271 INFO L82 PathProgramCache]: Analyzing trace with hash 869896554, now seen corresponding path program 22 times [2021-08-12 19:23:28,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:28,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570380159] [2021-08-12 19:23:28,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:28,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:28,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570380159] [2021-08-12 19:23:28,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570380159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:28,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490716747] [2021-08-12 19:23:28,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:28,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:23:28,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:28,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:23:28,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:28,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:23:28,415 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 [2021-08-12 19:23:28,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:23:28,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:28,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:28,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:24 [2021-08-12 19:23:28,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:28,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490716747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:28,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:28,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 12 [2021-08-12 19:23:28,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430605740] [2021-08-12 19:23:28,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:23:28,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:28,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:23:28,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:23:28,519 INFO L87 Difference]: Start difference. First operand 2796 states and 12052 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:29,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:29,928 INFO L93 Difference]: Finished difference Result 3305 states and 13831 transitions. [2021-08-12 19:23:29,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:23:29,928 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:29,937 INFO L225 Difference]: With dead ends: 3305 [2021-08-12 19:23:29,937 INFO L226 Difference]: Without dead ends: 3110 [2021-08-12 19:23:29,937 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 181.9ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:23:29,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3110 states. [2021-08-12 19:23:30,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3110 to 2716. [2021-08-12 19:23:30,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2715 states have (on average 4.311602209944751) internal successors, (11706), 2715 states have internal predecessors, (11706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:30,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 11706 transitions. [2021-08-12 19:23:30,233 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 11706 transitions. Word has length 29 [2021-08-12 19:23:30,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:30,233 INFO L482 AbstractCegarLoop]: Abstraction has 2716 states and 11706 transitions. [2021-08-12 19:23:30,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 11706 transitions. [2021-08-12 19:23:30,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:30,237 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:30,237 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:30,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:30,438 INFO L430 AbstractCegarLoop]: === Iteration 102 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:30,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:30,438 INFO L82 PathProgramCache]: Analyzing trace with hash 279969416, now seen corresponding path program 23 times [2021-08-12 19:23:30,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:30,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673859293] [2021-08-12 19:23:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:30,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:30,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673859293] [2021-08-12 19:23:30,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673859293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:30,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689346978] [2021-08-12 19:23:30,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:30,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:23:30,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:30,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:30,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:23:30,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-08-12 19:23:30,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:23:30,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:30,600 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:30,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-08-12 19:23:30,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:30,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689346978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:30,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:30,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-12 19:23:30,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132726514] [2021-08-12 19:23:30,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:23:30,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:30,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:23:30,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:23:30,636 INFO L87 Difference]: Start difference. First operand 2716 states and 11706 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:31,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:31,697 INFO L93 Difference]: Finished difference Result 2847 states and 12160 transitions. [2021-08-12 19:23:31,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:23:31,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:31,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:31,705 INFO L225 Difference]: With dead ends: 2847 [2021-08-12 19:23:31,705 INFO L226 Difference]: Without dead ends: 2826 [2021-08-12 19:23:31,706 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:23:31,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-08-12 19:23:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2713. [2021-08-12 19:23:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 4.312684365781711) internal successors, (11696), 2712 states have internal predecessors, (11696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:31,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 11696 transitions. [2021-08-12 19:23:31,997 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 11696 transitions. Word has length 29 [2021-08-12 19:23:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:31,997 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 11696 transitions. [2021-08-12 19:23:31,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 11696 transitions. [2021-08-12 19:23:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:32,000 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:32,001 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:32,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-12 19:23:32,201 INFO L430 AbstractCegarLoop]: === Iteration 103 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:32,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:32,201 INFO L82 PathProgramCache]: Analyzing trace with hash 25278284, now seen corresponding path program 24 times [2021-08-12 19:23:32,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:32,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533733856] [2021-08-12 19:23:32,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:32,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:32,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533733856] [2021-08-12 19:23:32,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533733856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:32,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582677626] [2021-08-12 19:23:32,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:32,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:23:32,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:32,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:32,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:32,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:32,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:23:32,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:23:32,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:32,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:32,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-08-12 19:23:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:32,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582677626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:32,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:32,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-08-12 19:23:32,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175651856] [2021-08-12 19:23:32,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:23:32,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:32,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:23:32,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:23:32,513 INFO L87 Difference]: Start difference. First operand 2713 states and 11696 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:34,224 INFO L93 Difference]: Finished difference Result 3337 states and 14091 transitions. [2021-08-12 19:23:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 19:23:34,224 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:34,234 INFO L225 Difference]: With dead ends: 3337 [2021-08-12 19:23:34,234 INFO L226 Difference]: Without dead ends: 3316 [2021-08-12 19:23:34,234 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 385.6ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:23:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3316 states. [2021-08-12 19:23:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3316 to 2828. [2021-08-12 19:23:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 4.305624336752741) internal successors, (12172), 2827 states have internal predecessors, (12172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:34,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 12172 transitions. [2021-08-12 19:23:34,546 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 12172 transitions. Word has length 29 [2021-08-12 19:23:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:34,546 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 12172 transitions. [2021-08-12 19:23:34,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:34,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 12172 transitions. [2021-08-12 19:23:34,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:34,551 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:34,551 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:34,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-12 19:23:34,751 INFO L430 AbstractCegarLoop]: === Iteration 104 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:34,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1328550890, now seen corresponding path program 25 times [2021-08-12 19:23:34,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:34,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547754923] [2021-08-12 19:23:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:34,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:34,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:34,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547754923] [2021-08-12 19:23:34,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547754923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:34,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215104260] [2021-08-12 19:23:34,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:34,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:23:34,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:34,917 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 [2021-08-12 19:23:34,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:23:34,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:34,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:34,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:22 [2021-08-12 19:23:35,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:35,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215104260] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:35,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:35,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-08-12 19:23:35,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593436746] [2021-08-12 19:23:35,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 19:23:35,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:35,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 19:23:35,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:23:35,049 INFO L87 Difference]: Start difference. First operand 2828 states and 12172 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:36,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:36,474 INFO L93 Difference]: Finished difference Result 3334 states and 13909 transitions. [2021-08-12 19:23:36,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:23:36,474 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:36,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:36,483 INFO L225 Difference]: With dead ends: 3334 [2021-08-12 19:23:36,484 INFO L226 Difference]: Without dead ends: 3133 [2021-08-12 19:23:36,484 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:23:36,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3133 states. [2021-08-12 19:23:36,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3133 to 2748. [2021-08-12 19:23:36,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2748 states, 2747 states have (on average 4.308336366945759) internal successors, (11835), 2747 states have internal predecessors, (11835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2748 states to 2748 states and 11835 transitions. [2021-08-12 19:23:36,795 INFO L78 Accepts]: Start accepts. Automaton has 2748 states and 11835 transitions. Word has length 29 [2021-08-12 19:23:36,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:36,795 INFO L482 AbstractCegarLoop]: Abstraction has 2748 states and 11835 transitions. [2021-08-12 19:23:36,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:36,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2748 states and 11835 transitions. [2021-08-12 19:23:36,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:36,799 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:36,799 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:37,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-12 19:23:37,000 INFO L430 AbstractCegarLoop]: === Iteration 105 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:37,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:37,001 INFO L82 PathProgramCache]: Analyzing trace with hash -430925422, now seen corresponding path program 26 times [2021-08-12 19:23:37,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:37,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579415691] [2021-08-12 19:23:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:37,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:37,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579415691] [2021-08-12 19:23:37,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579415691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:37,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866924988] [2021-08-12 19:23:37,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:37,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:23:37,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:37,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:37,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:37,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:37,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:23:37,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:23:37,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:37,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:37,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-08-12 19:23:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:37,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866924988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:37,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:37,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-08-12 19:23:37,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820151921] [2021-08-12 19:23:37,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:23:37,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:37,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:23:37,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:23:37,371 INFO L87 Difference]: Start difference. First operand 2748 states and 11835 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:39,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:39,047 INFO L93 Difference]: Finished difference Result 2978 states and 12616 transitions. [2021-08-12 19:23:39,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 19:23:39,048 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:39,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:39,056 INFO L225 Difference]: With dead ends: 2978 [2021-08-12 19:23:39,056 INFO L226 Difference]: Without dead ends: 2961 [2021-08-12 19:23:39,057 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 490.1ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:23:39,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2021-08-12 19:23:39,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2724. [2021-08-12 19:23:39,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 4.3088505325009185) internal successors, (11733), 2723 states have internal predecessors, (11733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 11733 transitions. [2021-08-12 19:23:39,364 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 11733 transitions. Word has length 29 [2021-08-12 19:23:39,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:39,364 INFO L482 AbstractCegarLoop]: Abstraction has 2724 states and 11733 transitions. [2021-08-12 19:23:39,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 11733 transitions. [2021-08-12 19:23:39,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:39,368 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:39,368 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:39,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:39,569 INFO L430 AbstractCegarLoop]: === Iteration 106 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:39,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1138592478, now seen corresponding path program 27 times [2021-08-12 19:23:39,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:39,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298496796] [2021-08-12 19:23:39,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:39,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:39,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:39,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298496796] [2021-08-12 19:23:39,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298496796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:39,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368392560] [2021-08-12 19:23:39,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:39,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:23:39,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:39,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:39,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:39,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:39,814 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 15 treesize of output 19 [2021-08-12 19:23:39,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:23:39,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:39,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:39,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-08-12 19:23:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:39,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368392560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:39,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:39,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-12 19:23:39,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612123201] [2021-08-12 19:23:39,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:23:39,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:39,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:23:39,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:23:39,895 INFO L87 Difference]: Start difference. First operand 2724 states and 11733 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:41,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:41,267 INFO L93 Difference]: Finished difference Result 2865 states and 12193 transitions. [2021-08-12 19:23:41,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:23:41,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:41,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:41,275 INFO L225 Difference]: With dead ends: 2865 [2021-08-12 19:23:41,276 INFO L226 Difference]: Without dead ends: 2848 [2021-08-12 19:23:41,276 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 328.8ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:23:41,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2021-08-12 19:23:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 2732. [2021-08-12 19:23:41,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2731 states have (on average 4.304284145001831) internal successors, (11755), 2731 states have internal predecessors, (11755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 11755 transitions. [2021-08-12 19:23:41,584 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 11755 transitions. Word has length 29 [2021-08-12 19:23:41,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:41,584 INFO L482 AbstractCegarLoop]: Abstraction has 2732 states and 11755 transitions. [2021-08-12 19:23:41,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 11755 transitions. [2021-08-12 19:23:41,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:41,588 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:41,588 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:41,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-08-12 19:23:41,791 INFO L430 AbstractCegarLoop]: === Iteration 107 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:41,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:41,792 INFO L82 PathProgramCache]: Analyzing trace with hash -324196480, now seen corresponding path program 11 times [2021-08-12 19:23:41,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:41,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102678619] [2021-08-12 19:23:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:41,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:41,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:41,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102678619] [2021-08-12 19:23:41,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102678619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:41,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255262910] [2021-08-12 19:23:41,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:41,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:23:41,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:41,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:41,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:42,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:23:42,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:23:42,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:42,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:42,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:13 [2021-08-12 19:23:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:42,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255262910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:42,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:42,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-12 19:23:42,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76538764] [2021-08-12 19:23:42,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:23:42,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:42,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:23:42,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:23:42,062 INFO L87 Difference]: Start difference. First operand 2732 states and 11755 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:43,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:43,676 INFO L93 Difference]: Finished difference Result 3431 states and 14480 transitions. [2021-08-12 19:23:43,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:23:43,677 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:43,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:43,686 INFO L225 Difference]: With dead ends: 3431 [2021-08-12 19:23:43,686 INFO L226 Difference]: Without dead ends: 3410 [2021-08-12 19:23:43,687 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:23:43,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3410 states. [2021-08-12 19:23:44,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3410 to 2875. [2021-08-12 19:23:44,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2875 states, 2874 states have (on average 4.293667362560891) internal successors, (12340), 2874 states have internal predecessors, (12340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2875 states to 2875 states and 12340 transitions. [2021-08-12 19:23:44,015 INFO L78 Accepts]: Start accepts. Automaton has 2875 states and 12340 transitions. Word has length 29 [2021-08-12 19:23:44,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:44,015 INFO L482 AbstractCegarLoop]: Abstraction has 2875 states and 12340 transitions. [2021-08-12 19:23:44,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2875 states and 12340 transitions. [2021-08-12 19:23:44,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:44,019 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:44,019 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:44,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-12 19:23:44,233 INFO L430 AbstractCegarLoop]: === Iteration 108 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:44,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:44,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1098158346, now seen corresponding path program 12 times [2021-08-12 19:23:44,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:44,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690955217] [2021-08-12 19:23:44,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:44,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:44,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690955217] [2021-08-12 19:23:44,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690955217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:44,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302019719] [2021-08-12 19:23:44,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:44,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:23:44,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:44,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:44,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:44,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-08-12 19:23:44,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:23:44,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:44,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:44,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:25 [2021-08-12 19:23:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:44,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302019719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:44,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:44,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-12 19:23:44,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848017219] [2021-08-12 19:23:44,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 19:23:44,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:44,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 19:23:44,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:23:44,585 INFO L87 Difference]: Start difference. First operand 2875 states and 12340 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:46,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:46,751 INFO L93 Difference]: Finished difference Result 3490 states and 14642 transitions. [2021-08-12 19:23:46,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 19:23:46,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:46,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:46,761 INFO L225 Difference]: With dead ends: 3490 [2021-08-12 19:23:46,761 INFO L226 Difference]: Without dead ends: 3457 [2021-08-12 19:23:46,761 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 635.4ms TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-08-12 19:23:46,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2021-08-12 19:23:47,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 2787. [2021-08-12 19:23:47,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2786 states have (on average 4.299353912419239) internal successors, (11978), 2786 states have internal predecessors, (11978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:47,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 11978 transitions. [2021-08-12 19:23:47,094 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 11978 transitions. Word has length 29 [2021-08-12 19:23:47,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:47,094 INFO L482 AbstractCegarLoop]: Abstraction has 2787 states and 11978 transitions. [2021-08-12 19:23:47,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:47,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 11978 transitions. [2021-08-12 19:23:47,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:47,098 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:47,098 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:47,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-12 19:23:47,298 INFO L430 AbstractCegarLoop]: === Iteration 109 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:47,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:47,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1564614906, now seen corresponding path program 13 times [2021-08-12 19:23:47,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:47,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228636780] [2021-08-12 19:23:47,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:47,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:47,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228636780] [2021-08-12 19:23:47,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228636780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:47,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370418228] [2021-08-12 19:23:47,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:47,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:47,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:47,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:23:47,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-08-12 19:23:47,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:23:47,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:47,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:47,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:13 [2021-08-12 19:23:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:47,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370418228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:47,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:47,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:23:47,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5145822] [2021-08-12 19:23:47,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:23:47,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:47,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:23:47,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:23:47,574 INFO L87 Difference]: Start difference. First operand 2787 states and 11978 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:48,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:48,946 INFO L93 Difference]: Finished difference Result 2980 states and 12652 transitions. [2021-08-12 19:23:48,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:23:48,947 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:48,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:48,955 INFO L225 Difference]: With dead ends: 2980 [2021-08-12 19:23:48,955 INFO L226 Difference]: Without dead ends: 2963 [2021-08-12 19:23:48,955 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 234.5ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:23:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2021-08-12 19:23:49,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2775. [2021-08-12 19:23:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2775 states, 2774 states have (on average 4.30281182408075) internal successors, (11936), 2774 states have internal predecessors, (11936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2775 states to 2775 states and 11936 transitions. [2021-08-12 19:23:49,281 INFO L78 Accepts]: Start accepts. Automaton has 2775 states and 11936 transitions. Word has length 29 [2021-08-12 19:23:49,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:49,281 INFO L482 AbstractCegarLoop]: Abstraction has 2775 states and 11936 transitions. [2021-08-12 19:23:49,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:49,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2775 states and 11936 transitions. [2021-08-12 19:23:49,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:49,285 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:49,285 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:49,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:49,486 INFO L430 AbstractCegarLoop]: === Iteration 110 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:49,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:49,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1817023806, now seen corresponding path program 14 times [2021-08-12 19:23:49,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:49,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624118959] [2021-08-12 19:23:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:49,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:49,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624118959] [2021-08-12 19:23:49,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624118959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:49,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494565471] [2021-08-12 19:23:49,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:49,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:23:49,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:49,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:49,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:49,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:49,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-08-12 19:23:49,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:23:49,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:49,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:49,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2021-08-12 19:23:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:49,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494565471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:49,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:49,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-12 19:23:49,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166602090] [2021-08-12 19:23:49,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:23:49,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:49,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:23:49,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:23:49,795 INFO L87 Difference]: Start difference. First operand 2775 states and 11936 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:51,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:51,307 INFO L93 Difference]: Finished difference Result 2921 states and 12431 transitions. [2021-08-12 19:23:51,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 19:23:51,307 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:51,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:51,315 INFO L225 Difference]: With dead ends: 2921 [2021-08-12 19:23:51,315 INFO L226 Difference]: Without dead ends: 2904 [2021-08-12 19:23:51,316 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:23:51,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2021-08-12 19:23:51,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2765. [2021-08-12 19:23:51,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 2764 states have (on average 4.306801736613603) internal successors, (11904), 2764 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:51,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 11904 transitions. [2021-08-12 19:23:51,637 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 11904 transitions. Word has length 29 [2021-08-12 19:23:51,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:51,637 INFO L482 AbstractCegarLoop]: Abstraction has 2765 states and 11904 transitions. [2021-08-12 19:23:51,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:51,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 11904 transitions. [2021-08-12 19:23:51,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:51,641 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:51,641 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:51,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:51,842 INFO L430 AbstractCegarLoop]: === Iteration 111 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:51,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:51,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1349518276, now seen corresponding path program 15 times [2021-08-12 19:23:51,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:51,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518302969] [2021-08-12 19:23:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:51,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:52,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:52,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518302969] [2021-08-12 19:23:52,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518302969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:52,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905233047] [2021-08-12 19:23:52,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:23:52,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 19:23:52,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:52,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:52,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:52,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:52,121 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 [2021-08-12 19:23:52,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:23:52,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:52,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:52,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:23:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:52,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905233047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:52,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:52,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-12 19:23:52,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261474814] [2021-08-12 19:23:52,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:23:52,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:52,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:23:52,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:23:52,255 INFO L87 Difference]: Start difference. First operand 2765 states and 11904 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:54,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:54,914 INFO L93 Difference]: Finished difference Result 3741 states and 15663 transitions. [2021-08-12 19:23:54,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 19:23:54,915 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:54,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:54,925 INFO L225 Difference]: With dead ends: 3741 [2021-08-12 19:23:54,925 INFO L226 Difference]: Without dead ends: 3720 [2021-08-12 19:23:54,926 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1050.2ms TimeCoverageRelationStatistics Valid=288, Invalid=1272, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:23:54,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2021-08-12 19:23:55,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 2904. [2021-08-12 19:23:55,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 4.300378918360317) internal successors, (12484), 2903 states have internal predecessors, (12484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 12484 transitions. [2021-08-12 19:23:55,275 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 12484 transitions. Word has length 29 [2021-08-12 19:23:55,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:55,275 INFO L482 AbstractCegarLoop]: Abstraction has 2904 states and 12484 transitions. [2021-08-12 19:23:55,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:55,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 12484 transitions. [2021-08-12 19:23:55,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:55,279 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:55,279 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:55,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:55,479 INFO L430 AbstractCegarLoop]: === Iteration 112 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:55,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:55,480 INFO L82 PathProgramCache]: Analyzing trace with hash 72836550, now seen corresponding path program 16 times [2021-08-12 19:23:55,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:55,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628212135] [2021-08-12 19:23:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:55,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:55,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628212135] [2021-08-12 19:23:55,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628212135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:55,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436473819] [2021-08-12 19:23:55,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 19:23:55,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:23:55,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:55,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:55,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:55,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:23:55,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2021-08-12 19:23:55,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:23:55,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:55,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:55,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:16 [2021-08-12 19:23:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:55,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436473819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:55,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:55,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-12 19:23:55,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487851014] [2021-08-12 19:23:55,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:23:55,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:55,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:23:55,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:23:55,817 INFO L87 Difference]: Start difference. First operand 2904 states and 12484 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:57,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:57,456 INFO L93 Difference]: Finished difference Result 3376 states and 14256 transitions. [2021-08-12 19:23:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:23:57,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:57,465 INFO L225 Difference]: With dead ends: 3376 [2021-08-12 19:23:57,466 INFO L226 Difference]: Without dead ends: 3343 [2021-08-12 19:23:57,466 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 301.0ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:23:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2021-08-12 19:23:57,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 2804. [2021-08-12 19:23:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2803 states have (on average 4.30467356403853) internal successors, (12066), 2803 states have internal predecessors, (12066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 12066 transitions. [2021-08-12 19:23:57,826 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 12066 transitions. Word has length 29 [2021-08-12 19:23:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:57,826 INFO L482 AbstractCegarLoop]: Abstraction has 2804 states and 12066 transitions. [2021-08-12 19:23:57,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 12066 transitions. [2021-08-12 19:23:57,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:57,831 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:57,831 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:23:58,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-12 19:23:58,031 INFO L430 AbstractCegarLoop]: === Iteration 113 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:23:58,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:23:58,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1705030594, now seen corresponding path program 17 times [2021-08-12 19:23:58,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:23:58,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438506305] [2021-08-12 19:23:58,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:23:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:23:58,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:58,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:23:58,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438506305] [2021-08-12 19:23:58,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438506305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:58,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803986563] [2021-08-12 19:23:58,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:23:58,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:23:58,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:23:58,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:23:58,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:23:58,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:23:58,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:23:58,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:23:58,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:23:58,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-08-12 19:23:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:23:58,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803986563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:23:58,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:23:58,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-08-12 19:23:58,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826160871] [2021-08-12 19:23:58,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:23:58,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:23:58,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:23:58,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:23:58,320 INFO L87 Difference]: Start difference. First operand 2804 states and 12066 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:59,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:23:59,611 INFO L93 Difference]: Finished difference Result 2928 states and 12489 transitions. [2021-08-12 19:23:59,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 19:23:59,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:23:59,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:23:59,620 INFO L225 Difference]: With dead ends: 2928 [2021-08-12 19:23:59,620 INFO L226 Difference]: Without dead ends: 2911 [2021-08-12 19:23:59,621 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 251.6ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-12 19:23:59,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2021-08-12 19:23:59,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2774. [2021-08-12 19:23:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2774 states, 2773 states have (on average 4.30580598629643) internal successors, (11940), 2773 states have internal predecessors, (11940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:59,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 11940 transitions. [2021-08-12 19:23:59,957 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 11940 transitions. Word has length 29 [2021-08-12 19:23:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:23:59,957 INFO L482 AbstractCegarLoop]: Abstraction has 2774 states and 11940 transitions. [2021-08-12 19:23:59,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:23:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 11940 transitions. [2021-08-12 19:23:59,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:23:59,961 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:23:59,961 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:00,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-12 19:24:00,162 INFO L430 AbstractCegarLoop]: === Iteration 114 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:00,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:00,163 INFO L82 PathProgramCache]: Analyzing trace with hash -101608384, now seen corresponding path program 18 times [2021-08-12 19:24:00,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:00,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379889928] [2021-08-12 19:24:00,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:00,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:00,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379889928] [2021-08-12 19:24:00,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379889928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:00,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506454509] [2021-08-12 19:24:00,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:00,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-12 19:24:00,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:00,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:24:00,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:00,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:24:00,395 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 [2021-08-12 19:24:00,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:24:00,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:24:00,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:24:00,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-08-12 19:24:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:00,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506454509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:00,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:00,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-12 19:24:00,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480132574] [2021-08-12 19:24:00,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 19:24:00,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:00,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 19:24:00,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-12 19:24:00,555 INFO L87 Difference]: Start difference. First operand 2774 states and 11940 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:03,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:03,210 INFO L93 Difference]: Finished difference Result 3813 states and 15867 transitions. [2021-08-12 19:24:03,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:24:03,210 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:24:03,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:03,222 INFO L225 Difference]: With dead ends: 3813 [2021-08-12 19:24:03,222 INFO L226 Difference]: Without dead ends: 3792 [2021-08-12 19:24:03,222 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 862.5ms TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 19:24:03,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2021-08-12 19:24:03,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 2904. [2021-08-12 19:24:03,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2904 states, 2903 states have (on average 4.299345504650362) internal successors, (12481), 2903 states have internal predecessors, (12481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:03,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2904 states to 2904 states and 12481 transitions. [2021-08-12 19:24:03,573 INFO L78 Accepts]: Start accepts. Automaton has 2904 states and 12481 transitions. Word has length 29 [2021-08-12 19:24:03,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:03,573 INFO L482 AbstractCegarLoop]: Abstraction has 2904 states and 12481 transitions. [2021-08-12 19:24:03,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:03,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2904 states and 12481 transitions. [2021-08-12 19:24:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:24:03,577 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:03,577 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:03,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-12 19:24:03,778 INFO L430 AbstractCegarLoop]: === Iteration 115 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:03,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:03,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1320746442, now seen corresponding path program 19 times [2021-08-12 19:24:03,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:03,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924446203] [2021-08-12 19:24:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:03,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:03,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924446203] [2021-08-12 19:24:03,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924446203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:03,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868664621] [2021-08-12 19:24:03,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:04,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-12 19:24:04,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:04,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-12 19:24:04,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:24:04,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:24:04,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:24:04,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:16 [2021-08-12 19:24:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:04,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868664621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:04,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:04,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-08-12 19:24:04,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609366562] [2021-08-12 19:24:04,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 19:24:04,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:04,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 19:24:04,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:24:04,127 INFO L87 Difference]: Start difference. First operand 2904 states and 12481 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:05,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:05,800 INFO L93 Difference]: Finished difference Result 3371 states and 14238 transitions. [2021-08-12 19:24:05,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:24:05,800 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:24:05,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:05,809 INFO L225 Difference]: With dead ends: 3371 [2021-08-12 19:24:05,809 INFO L226 Difference]: Without dead ends: 3338 [2021-08-12 19:24:05,810 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 262.1ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-08-12 19:24:05,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-08-12 19:24:06,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2804. [2021-08-12 19:24:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2804 states, 2803 states have (on average 4.3036032821976455) internal successors, (12063), 2803 states have internal predecessors, (12063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2804 states to 2804 states and 12063 transitions. [2021-08-12 19:24:06,156 INFO L78 Accepts]: Start accepts. Automaton has 2804 states and 12063 transitions. Word has length 29 [2021-08-12 19:24:06,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:06,156 INFO L482 AbstractCegarLoop]: Abstraction has 2804 states and 12063 transitions. [2021-08-12 19:24:06,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:06,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2804 states and 12063 transitions. [2021-08-12 19:24:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-12 19:24:06,160 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:06,160 INFO L550 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:06,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-12 19:24:06,361 INFO L430 AbstractCegarLoop]: === Iteration 116 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:06,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:06,361 INFO L82 PathProgramCache]: Analyzing trace with hash -262935812, now seen corresponding path program 20 times [2021-08-12 19:24:06,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:06,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763817323] [2021-08-12 19:24:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:06,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:06,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763817323] [2021-08-12 19:24:06,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763817323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:06,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862516102] [2021-08-12 19:24:06,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:06,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:24:06,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:06,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-12 19:24:06,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:06,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-12 19:24:06,559 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 [2021-08-12 19:24:06,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:24:06,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:24:06,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:24:06,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:22 [2021-08-12 19:24:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:06,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862516102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:06,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:06,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-12 19:24:06,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748839184] [2021-08-12 19:24:06,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 19:24:06,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:06,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 19:24:06,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-08-12 19:24:06,672 INFO L87 Difference]: Start difference. First operand 2804 states and 12063 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:08,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:08,049 INFO L93 Difference]: Finished difference Result 2920 states and 12431 transitions. [2021-08-12 19:24:08,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 19:24:08,050 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-08-12 19:24:08,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:08,058 INFO L225 Difference]: With dead ends: 2920 [2021-08-12 19:24:08,058 INFO L226 Difference]: Without dead ends: 2899 [2021-08-12 19:24:08,059 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 306.8ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-12 19:24:08,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2021-08-12 19:24:08,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2780. [2021-08-12 19:24:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2780 states, 2779 states have (on average 4.305145735876215) internal successors, (11964), 2779 states have internal predecessors, (11964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:08,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 11964 transitions. [2021-08-12 19:24:08,398 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 11964 transitions. Word has length 29 [2021-08-12 19:24:08,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:08,398 INFO L482 AbstractCegarLoop]: Abstraction has 2780 states and 11964 transitions. [2021-08-12 19:24:08,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:08,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 11964 transitions. [2021-08-12 19:24:08,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:24:08,402 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:08,402 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:08,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-12 19:24:08,603 INFO L430 AbstractCegarLoop]: === Iteration 117 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:08,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:08,603 INFO L82 PathProgramCache]: Analyzing trace with hash -701780529, now seen corresponding path program 36 times [2021-08-12 19:24:08,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:08,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737180464] [2021-08-12 19:24:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:08,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:08,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737180464] [2021-08-12 19:24:08,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737180464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:08,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587443161] [2021-08-12 19:24:08,621 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 [2021-08-12 19:24:08,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:24:08,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:08,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-12 19:24:08,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:08,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587443161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:08,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:08,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-08-12 19:24:08,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848052203] [2021-08-12 19:24:08,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:24:08,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:08,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:24:08,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:24:08,711 INFO L87 Difference]: Start difference. First operand 2780 states and 11964 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:10,408 INFO L93 Difference]: Finished difference Result 4313 states and 17951 transitions. [2021-08-12 19:24:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:24:10,408 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:24:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:10,419 INFO L225 Difference]: With dead ends: 4313 [2021-08-12 19:24:10,419 INFO L226 Difference]: Without dead ends: 4155 [2021-08-12 19:24:10,420 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:24:10,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-08-12 19:24:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3739. [2021-08-12 19:24:10,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 4.313001605136437) internal successors, (16122), 3738 states have internal predecessors, (16122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:10,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 16122 transitions. [2021-08-12 19:24:10,894 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 16122 transitions. Word has length 31 [2021-08-12 19:24:10,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:10,894 INFO L482 AbstractCegarLoop]: Abstraction has 3739 states and 16122 transitions. [2021-08-12 19:24:10,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:10,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 16122 transitions. [2021-08-12 19:24:10,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:24:10,899 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:10,899 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:11,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:11,100 INFO L430 AbstractCegarLoop]: === Iteration 118 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:11,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1736759473, now seen corresponding path program 37 times [2021-08-12 19:24:11,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:11,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321132433] [2021-08-12 19:24:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:11,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:11,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321132433] [2021-08-12 19:24:11,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321132433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:11,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248707193] [2021-08-12 19:24:11,131 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 [2021-08-12 19:24:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:11,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:24:11,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:11,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248707193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:11,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:11,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-08-12 19:24:11,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183983328] [2021-08-12 19:24:11,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:24:11,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:11,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:24:11,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:24:11,219 INFO L87 Difference]: Start difference. First operand 3739 states and 16122 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:13,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:13,302 INFO L93 Difference]: Finished difference Result 4920 states and 20268 transitions. [2021-08-12 19:24:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:24:13,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:24:13,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:13,318 INFO L225 Difference]: With dead ends: 4920 [2021-08-12 19:24:13,318 INFO L226 Difference]: Without dead ends: 4724 [2021-08-12 19:24:13,319 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:24:13,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4724 states. [2021-08-12 19:24:13,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4724 to 3848. [2021-08-12 19:24:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3848 states, 3847 states have (on average 4.288536521965168) internal successors, (16498), 3847 states have internal predecessors, (16498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3848 states to 3848 states and 16498 transitions. [2021-08-12 19:24:13,810 INFO L78 Accepts]: Start accepts. Automaton has 3848 states and 16498 transitions. Word has length 31 [2021-08-12 19:24:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:13,811 INFO L482 AbstractCegarLoop]: Abstraction has 3848 states and 16498 transitions. [2021-08-12 19:24:13,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:13,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3848 states and 16498 transitions. [2021-08-12 19:24:13,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:24:13,816 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:13,816 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:14,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-12 19:24:14,017 INFO L430 AbstractCegarLoop]: === Iteration 119 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:14,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:14,017 INFO L82 PathProgramCache]: Analyzing trace with hash -210326895, now seen corresponding path program 38 times [2021-08-12 19:24:14,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:14,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393916624] [2021-08-12 19:24:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:14,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:14,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:14,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393916624] [2021-08-12 19:24:14,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393916624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:14,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668782912] [2021-08-12 19:24:14,039 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 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 [2021-08-12 19:24:14,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:24:14,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:14,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:24:14,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:14,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668782912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:14,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:14,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-08-12 19:24:14,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012663706] [2021-08-12 19:24:14,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 19:24:14,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:14,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 19:24:14,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:24:14,151 INFO L87 Difference]: Start difference. First operand 3848 states and 16498 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:16,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:16,888 INFO L93 Difference]: Finished difference Result 6105 states and 24909 transitions. [2021-08-12 19:24:16,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 19:24:16,888 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:24:16,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:16,904 INFO L225 Difference]: With dead ends: 6105 [2021-08-12 19:24:16,904 INFO L226 Difference]: Without dead ends: 5723 [2021-08-12 19:24:16,905 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-08-12 19:24:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5723 states. [2021-08-12 19:24:17,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5723 to 4408. [2021-08-12 19:24:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4408 states, 4407 states have (on average 4.309507601542999) internal successors, (18992), 4407 states have internal predecessors, (18992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4408 states to 4408 states and 18992 transitions. [2021-08-12 19:24:17,521 INFO L78 Accepts]: Start accepts. Automaton has 4408 states and 18992 transitions. Word has length 31 [2021-08-12 19:24:17,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:17,521 INFO L482 AbstractCegarLoop]: Abstraction has 4408 states and 18992 transitions. [2021-08-12 19:24:17,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand 4408 states and 18992 transitions. [2021-08-12 19:24:17,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:24:17,529 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:17,529 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:17,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:17,729 INFO L430 AbstractCegarLoop]: === Iteration 120 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:17,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:17,730 INFO L82 PathProgramCache]: Analyzing trace with hash -296650923, now seen corresponding path program 39 times [2021-08-12 19:24:17,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:17,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191198622] [2021-08-12 19:24:17,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:17,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:17,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191198622] [2021-08-12 19:24:17,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191198622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:17,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662412390] [2021-08-12 19:24:17,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:17,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:24:17,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:17,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:24:17,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:17,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662412390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:17,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:17,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-08-12 19:24:17,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715887233] [2021-08-12 19:24:17,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:24:17,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:17,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:24:17,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:24:17,831 INFO L87 Difference]: Start difference. First operand 4408 states and 18992 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:20,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:20,110 INFO L93 Difference]: Finished difference Result 5325 states and 22267 transitions. [2021-08-12 19:24:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:24:20,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:24:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:20,125 INFO L225 Difference]: With dead ends: 5325 [2021-08-12 19:24:20,125 INFO L226 Difference]: Without dead ends: 5190 [2021-08-12 19:24:20,126 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:24:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2021-08-12 19:24:20,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 4400. [2021-08-12 19:24:20,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4400 states, 4399 states have (on average 4.2798363264378265) internal successors, (18827), 4399 states have internal predecessors, (18827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4400 states to 4400 states and 18827 transitions. [2021-08-12 19:24:20,748 INFO L78 Accepts]: Start accepts. Automaton has 4400 states and 18827 transitions. Word has length 31 [2021-08-12 19:24:20,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:20,748 INFO L482 AbstractCegarLoop]: Abstraction has 4400 states and 18827 transitions. [2021-08-12 19:24:20,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 4400 states and 18827 transitions. [2021-08-12 19:24:20,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:24:20,755 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:20,755 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:20,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:20,955 INFO L430 AbstractCegarLoop]: === Iteration 121 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:20,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:20,956 INFO L82 PathProgramCache]: Analyzing trace with hash 75547345, now seen corresponding path program 40 times [2021-08-12 19:24:20,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:20,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460042264] [2021-08-12 19:24:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:20,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:20,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460042264] [2021-08-12 19:24:20,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460042264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:20,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985807069] [2021-08-12 19:24:20,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:21,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:24:21,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:21,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:24:21,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:21,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985807069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:21,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:21,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-08-12 19:24:21,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760765104] [2021-08-12 19:24:21,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 19:24:21,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:21,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 19:24:21,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-12 19:24:21,061 INFO L87 Difference]: Start difference. First operand 4400 states and 18827 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:24,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:24,124 INFO L93 Difference]: Finished difference Result 7218 states and 29832 transitions. [2021-08-12 19:24:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-12 19:24:24,124 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:24:24,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:24,144 INFO L225 Difference]: With dead ends: 7218 [2021-08-12 19:24:24,144 INFO L226 Difference]: Without dead ends: 6921 [2021-08-12 19:24:24,145 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-12 19:24:24,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6921 states. [2021-08-12 19:24:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6921 to 5792. [2021-08-12 19:24:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 5791 states have (on average 4.318425142462441) internal successors, (25008), 5791 states have internal predecessors, (25008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:24,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 25008 transitions. [2021-08-12 19:24:24,844 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 25008 transitions. Word has length 31 [2021-08-12 19:24:24,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:24,844 INFO L482 AbstractCegarLoop]: Abstraction has 5792 states and 25008 transitions. [2021-08-12 19:24:24,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:24,844 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 25008 transitions. [2021-08-12 19:24:24,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:24:24,853 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:24,853 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:25,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-08-12 19:24:25,053 INFO L430 AbstractCegarLoop]: === Iteration 122 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:25,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:25,054 INFO L82 PathProgramCache]: Analyzing trace with hash -205490181, now seen corresponding path program 41 times [2021-08-12 19:24:25,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:25,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556469889] [2021-08-12 19:24:25,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:25,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:25,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556469889] [2021-08-12 19:24:25,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556469889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:25,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932620196] [2021-08-12 19:24:25,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:25,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:24:25,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:25,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:24:25,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:25,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932620196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:25,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:25,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-08-12 19:24:25,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341330536] [2021-08-12 19:24:25,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:24:25,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:25,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:24:25,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:24:25,154 INFO L87 Difference]: Start difference. First operand 5792 states and 25008 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:28,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:28,254 INFO L93 Difference]: Finished difference Result 7574 states and 31499 transitions. [2021-08-12 19:24:28,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 19:24:28,255 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:24:28,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:28,276 INFO L225 Difference]: With dead ends: 7574 [2021-08-12 19:24:28,276 INFO L226 Difference]: Without dead ends: 7409 [2021-08-12 19:24:28,277 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:24:28,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7409 states. [2021-08-12 19:24:28,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7409 to 5656. [2021-08-12 19:24:28,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5656 states, 5655 states have (on average 4.315296198054819) internal successors, (24403), 5655 states have internal predecessors, (24403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5656 states to 5656 states and 24403 transitions. [2021-08-12 19:24:29,007 INFO L78 Accepts]: Start accepts. Automaton has 5656 states and 24403 transitions. Word has length 31 [2021-08-12 19:24:29,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:29,008 INFO L482 AbstractCegarLoop]: Abstraction has 5656 states and 24403 transitions. [2021-08-12 19:24:29,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:29,008 INFO L276 IsEmpty]: Start isEmpty. Operand 5656 states and 24403 transitions. [2021-08-12 19:24:29,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:24:29,016 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:29,016 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:29,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:29,217 INFO L430 AbstractCegarLoop]: === Iteration 123 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:29,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1507309107, now seen corresponding path program 42 times [2021-08-12 19:24:29,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:29,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606220528] [2021-08-12 19:24:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:29,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:29,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606220528] [2021-08-12 19:24:29,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606220528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:29,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190717458] [2021-08-12 19:24:29,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:29,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:24:29,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:29,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:24:29,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:29,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190717458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:29,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:29,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-12 19:24:29,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191941872] [2021-08-12 19:24:29,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 19:24:29,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:29,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 19:24:29,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-12 19:24:29,329 INFO L87 Difference]: Start difference. First operand 5656 states and 24403 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:32,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:32,354 INFO L93 Difference]: Finished difference Result 7354 states and 30598 transitions. [2021-08-12 19:24:32,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:24:32,355 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:24:32,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:32,375 INFO L225 Difference]: With dead ends: 7354 [2021-08-12 19:24:32,375 INFO L226 Difference]: Without dead ends: 7213 [2021-08-12 19:24:32,376 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-12 19:24:32,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7213 states. [2021-08-12 19:24:33,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7213 to 6069. [2021-08-12 19:24:33,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6069 states, 6068 states have (on average 4.318226763348714) internal successors, (26203), 6068 states have internal predecessors, (26203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:33,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 26203 transitions. [2021-08-12 19:24:33,106 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 26203 transitions. Word has length 31 [2021-08-12 19:24:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:33,106 INFO L482 AbstractCegarLoop]: Abstraction has 6069 states and 26203 transitions. [2021-08-12 19:24:33,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 26203 transitions. [2021-08-12 19:24:33,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-12 19:24:33,115 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:33,115 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:33,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:33,316 INFO L430 AbstractCegarLoop]: === Iteration 124 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:33,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:33,316 INFO L82 PathProgramCache]: Analyzing trace with hash 562379733, now seen corresponding path program 43 times [2021-08-12 19:24:33,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:33,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903196781] [2021-08-12 19:24:33,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:33,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:33,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903196781] [2021-08-12 19:24:33,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903196781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:33,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469068171] [2021-08-12 19:24:33,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:33,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-12 19:24:33,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:33,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469068171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:33,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:33,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-12 19:24:33,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782192382] [2021-08-12 19:24:33,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 19:24:33,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:33,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 19:24:33,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-12 19:24:33,446 INFO L87 Difference]: Start difference. First operand 6069 states and 26203 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:36,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:36,824 INFO L93 Difference]: Finished difference Result 8382 states and 34684 transitions. [2021-08-12 19:24:36,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 19:24:36,825 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-12 19:24:36,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:36,847 INFO L225 Difference]: With dead ends: 8382 [2021-08-12 19:24:36,847 INFO L226 Difference]: Without dead ends: 7998 [2021-08-12 19:24:36,849 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-08-12 19:24:36,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7998 states. [2021-08-12 19:24:37,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7998 to 5836. [2021-08-12 19:24:37,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5836 states, 5835 states have (on average 4.310025706940874) internal successors, (25149), 5835 states have internal predecessors, (25149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:37,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5836 states to 5836 states and 25149 transitions. [2021-08-12 19:24:37,577 INFO L78 Accepts]: Start accepts. Automaton has 5836 states and 25149 transitions. Word has length 31 [2021-08-12 19:24:37,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:37,577 INFO L482 AbstractCegarLoop]: Abstraction has 5836 states and 25149 transitions. [2021-08-12 19:24:37,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:37,577 INFO L276 IsEmpty]: Start isEmpty. Operand 5836 states and 25149 transitions. [2021-08-12 19:24:37,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:24:37,587 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:37,587 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:37,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-12 19:24:37,787 INFO L430 AbstractCegarLoop]: === Iteration 125 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:37,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:37,788 INFO L82 PathProgramCache]: Analyzing trace with hash 236625456, now seen corresponding path program 44 times [2021-08-12 19:24:37,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:37,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609948748] [2021-08-12 19:24:37,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:38,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:38,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609948748] [2021-08-12 19:24:38,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609948748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:38,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082190223] [2021-08-12 19:24:38,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:38,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:24:38,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:38,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:24:38,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:38,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:24:38,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-12 19:24:38,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:24:38,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:24:38,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:24:38,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-08-12 19:24:38,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:38,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082190223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:38,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:38,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-12 19:24:38,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183517595] [2021-08-12 19:24:38,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:24:38,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:38,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:24:38,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:24:38,477 INFO L87 Difference]: Start difference. First operand 5836 states and 25149 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:42,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:42,213 INFO L93 Difference]: Finished difference Result 6480 states and 27686 transitions. [2021-08-12 19:24:42,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 19:24:42,213 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:24:42,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:42,232 INFO L225 Difference]: With dead ends: 6480 [2021-08-12 19:24:42,232 INFO L226 Difference]: Without dead ends: 6459 [2021-08-12 19:24:42,233 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1119.3ms TimeCoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:24:42,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6459 states. [2021-08-12 19:24:42,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6459 to 5939. [2021-08-12 19:24:42,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5938 states have (on average 4.303974402155608) internal successors, (25557), 5938 states have internal predecessors, (25557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:42,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 25557 transitions. [2021-08-12 19:24:42,955 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 25557 transitions. Word has length 33 [2021-08-12 19:24:42,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:42,955 INFO L482 AbstractCegarLoop]: Abstraction has 5939 states and 25557 transitions. [2021-08-12 19:24:42,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:42,955 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 25557 transitions. [2021-08-12 19:24:42,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:24:42,965 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:42,965 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:43,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:43,166 INFO L430 AbstractCegarLoop]: === Iteration 126 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:43,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:43,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1982190470, now seen corresponding path program 45 times [2021-08-12 19:24:43,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:43,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499448052] [2021-08-12 19:24:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:43,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:43,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499448052] [2021-08-12 19:24:43,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499448052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:43,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731222988] [2021-08-12 19:24:43,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:43,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:24:43,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:43,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:24:43,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:43,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:24:43,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-12 19:24:43,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:24:43,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:24:43,725 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:24:43,725 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-08-12 19:24:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:43,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731222988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:43,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:43,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-12 19:24:43,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737679968] [2021-08-12 19:24:43,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:24:43,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:43,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:24:43,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:24:43,892 INFO L87 Difference]: Start difference. First operand 5939 states and 25557 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:47,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:47,698 INFO L93 Difference]: Finished difference Result 6499 states and 27748 transitions. [2021-08-12 19:24:47,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 19:24:47,698 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:24:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:47,717 INFO L225 Difference]: With dead ends: 6499 [2021-08-12 19:24:47,718 INFO L226 Difference]: Without dead ends: 6478 [2021-08-12 19:24:47,718 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1139.8ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:24:47,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6478 states. [2021-08-12 19:24:48,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6478 to 5942. [2021-08-12 19:24:48,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5942 states, 5941 states have (on average 4.303484261908769) internal successors, (25567), 5941 states have internal predecessors, (25567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5942 states to 5942 states and 25567 transitions. [2021-08-12 19:24:48,442 INFO L78 Accepts]: Start accepts. Automaton has 5942 states and 25567 transitions. Word has length 33 [2021-08-12 19:24:48,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:48,442 INFO L482 AbstractCegarLoop]: Abstraction has 5942 states and 25567 transitions. [2021-08-12 19:24:48,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:48,442 INFO L276 IsEmpty]: Start isEmpty. Operand 5942 states and 25567 transitions. [2021-08-12 19:24:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:24:48,451 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:48,452 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:48,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-12 19:24:48,652 INFO L430 AbstractCegarLoop]: === Iteration 127 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:48,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:48,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1861531658, now seen corresponding path program 46 times [2021-08-12 19:24:48,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:48,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866263857] [2021-08-12 19:24:48,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:48,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:48,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866263857] [2021-08-12 19:24:48,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866263857] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:48,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669757079] [2021-08-12 19:24:48,840 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 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 [2021-08-12 19:24:48,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:24:48,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:48,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:24:48,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:49,080 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 [2021-08-12 19:24:49,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:24:49,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:24:49,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:24:49,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-08-12 19:24:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:49,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669757079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:49,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:49,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-12 19:24:49,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640847766] [2021-08-12 19:24:49,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:24:49,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:49,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:24:49,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:24:49,145 INFO L87 Difference]: Start difference. First operand 5942 states and 25567 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:53,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:53,129 INFO L93 Difference]: Finished difference Result 6459 states and 27477 transitions. [2021-08-12 19:24:53,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 19:24:53,129 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:24:53,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:53,150 INFO L225 Difference]: With dead ends: 6459 [2021-08-12 19:24:53,150 INFO L226 Difference]: Without dead ends: 6438 [2021-08-12 19:24:53,151 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1058.2ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:24:53,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2021-08-12 19:24:53,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 5990. [2021-08-12 19:24:53,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5990 states, 5989 states have (on average 4.307062948739356) internal successors, (25795), 5989 states have internal predecessors, (25795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5990 states to 5990 states and 25795 transitions. [2021-08-12 19:24:53,884 INFO L78 Accepts]: Start accepts. Automaton has 5990 states and 25795 transitions. Word has length 33 [2021-08-12 19:24:53,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:53,884 INFO L482 AbstractCegarLoop]: Abstraction has 5990 states and 25795 transitions. [2021-08-12 19:24:53,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:53,884 INFO L276 IsEmpty]: Start isEmpty. Operand 5990 states and 25795 transitions. [2021-08-12 19:24:53,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:24:53,894 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:53,894 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:54,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-12 19:24:54,097 INFO L430 AbstractCegarLoop]: === Iteration 128 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:54,097 INFO L82 PathProgramCache]: Analyzing trace with hash 278487964, now seen corresponding path program 47 times [2021-08-12 19:24:54,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:54,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630722346] [2021-08-12 19:24:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:24:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:54,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:24:54,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630722346] [2021-08-12 19:24:54,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630722346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:54,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644500030] [2021-08-12 19:24:54,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:24:54,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:24:54,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:24:54,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:24:54,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:24:54,541 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 [2021-08-12 19:24:54,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:24:54,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:24:54,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:24:54,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-08-12 19:24:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:24:54,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644500030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:24:54,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:24:54,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-12 19:24:54,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219177495] [2021-08-12 19:24:54,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:24:54,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:24:54,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:24:54,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=458, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:24:54,683 INFO L87 Difference]: Start difference. First operand 5990 states and 25795 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:24:58,927 INFO L93 Difference]: Finished difference Result 6605 states and 28105 transitions. [2021-08-12 19:24:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:24:58,928 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:24:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:24:58,950 INFO L225 Difference]: With dead ends: 6605 [2021-08-12 19:24:58,950 INFO L226 Difference]: Without dead ends: 6584 [2021-08-12 19:24:58,952 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1193.6ms TimeCoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:24:58,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6584 states. [2021-08-12 19:24:59,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6584 to 6014. [2021-08-12 19:24:59,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6014 states, 6013 states have (on average 4.308165641110926) internal successors, (25905), 6013 states have internal predecessors, (25905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:59,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6014 states to 6014 states and 25905 transitions. [2021-08-12 19:24:59,746 INFO L78 Accepts]: Start accepts. Automaton has 6014 states and 25905 transitions. Word has length 33 [2021-08-12 19:24:59,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:24:59,746 INFO L482 AbstractCegarLoop]: Abstraction has 6014 states and 25905 transitions. [2021-08-12 19:24:59,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:24:59,746 INFO L276 IsEmpty]: Start isEmpty. Operand 6014 states and 25905 transitions. [2021-08-12 19:24:59,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:24:59,756 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:24:59,756 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:24:59,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-12 19:24:59,961 INFO L430 AbstractCegarLoop]: === Iteration 129 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:24:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:24:59,961 INFO L82 PathProgramCache]: Analyzing trace with hash -285109460, now seen corresponding path program 48 times [2021-08-12 19:24:59,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:24:59,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657163654] [2021-08-12 19:24:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:24:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:00,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:00,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657163654] [2021-08-12 19:25:00,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657163654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:00,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004595512] [2021-08-12 19:25:00,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:00,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:25:00,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:00,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:25:00,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:00,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:25:00,542 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-08-12 19:25:00,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-08-12 19:25:00,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:25:00,576 INFO L628 ElimStorePlain]: treesize reduction 43, result has 33.8 percent of original size [2021-08-12 19:25:00,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:25:00,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-08-12 19:25:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:00,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004595512] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:00,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:00,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-12 19:25:00,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77497538] [2021-08-12 19:25:00,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:25:00,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:00,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:25:00,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:25:00,709 INFO L87 Difference]: Start difference. First operand 6014 states and 25905 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:04,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:04,942 INFO L93 Difference]: Finished difference Result 6447 states and 27479 transitions. [2021-08-12 19:25:04,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:25:04,942 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:25:04,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:04,965 INFO L225 Difference]: With dead ends: 6447 [2021-08-12 19:25:04,965 INFO L226 Difference]: Without dead ends: 6426 [2021-08-12 19:25:04,967 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1399.9ms TimeCoverageRelationStatistics Valid=197, Invalid=1873, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:25:04,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6426 states. [2021-08-12 19:25:05,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6426 to 6024. [2021-08-12 19:25:05,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6024 states, 6023 states have (on average 4.307155902374232) internal successors, (25942), 6023 states have internal predecessors, (25942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:05,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 25942 transitions. [2021-08-12 19:25:05,748 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 25942 transitions. Word has length 33 [2021-08-12 19:25:05,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:05,748 INFO L482 AbstractCegarLoop]: Abstraction has 6024 states and 25942 transitions. [2021-08-12 19:25:05,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:05,748 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 25942 transitions. [2021-08-12 19:25:05,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:25:05,757 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:05,757 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:05,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:05,961 INFO L430 AbstractCegarLoop]: === Iteration 130 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:05,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:05,961 INFO L82 PathProgramCache]: Analyzing trace with hash -656334466, now seen corresponding path program 49 times [2021-08-12 19:25:05,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:05,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591405132] [2021-08-12 19:25:05,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:06,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:06,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591405132] [2021-08-12 19:25:06,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591405132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:06,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606563692] [2021-08-12 19:25:06,139 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 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 [2021-08-12 19:25:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:06,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:25:06,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:06,360 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 [2021-08-12 19:25:06,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:25:06,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:25:06,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:25:06,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-08-12 19:25:06,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:06,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606563692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:06,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:06,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-12 19:25:06,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622868384] [2021-08-12 19:25:06,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:25:06,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:06,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:25:06,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:25:06,452 INFO L87 Difference]: Start difference. First operand 6024 states and 25942 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:10,466 INFO L93 Difference]: Finished difference Result 6950 states and 29537 transitions. [2021-08-12 19:25:10,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:25:10,466 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:25:10,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:10,488 INFO L225 Difference]: With dead ends: 6950 [2021-08-12 19:25:10,488 INFO L226 Difference]: Without dead ends: 6933 [2021-08-12 19:25:10,489 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 757.7ms TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:25:10,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6933 states. [2021-08-12 19:25:11,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6933 to 6087. [2021-08-12 19:25:11,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6087 states, 6086 states have (on average 4.306112389089714) internal successors, (26207), 6086 states have internal predecessors, (26207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:11,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6087 states to 6087 states and 26207 transitions. [2021-08-12 19:25:11,280 INFO L78 Accepts]: Start accepts. Automaton has 6087 states and 26207 transitions. Word has length 33 [2021-08-12 19:25:11,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:11,281 INFO L482 AbstractCegarLoop]: Abstraction has 6087 states and 26207 transitions. [2021-08-12 19:25:11,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:11,281 INFO L276 IsEmpty]: Start isEmpty. Operand 6087 states and 26207 transitions. [2021-08-12 19:25:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:25:11,290 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:11,290 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:11,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-12 19:25:11,491 INFO L430 AbstractCegarLoop]: === Iteration 131 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:11,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:11,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1970239388, now seen corresponding path program 50 times [2021-08-12 19:25:11,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:11,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194445269] [2021-08-12 19:25:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:11,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:11,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194445269] [2021-08-12 19:25:11,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194445269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:11,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976693196] [2021-08-12 19:25:11,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:11,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:25:11,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:11,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:25:11,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:12,014 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:25:12,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-12 19:25:12,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:25:12,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:25:12,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:25:12,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-08-12 19:25:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:12,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976693196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:12,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:12,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-12 19:25:12,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672405433] [2021-08-12 19:25:12,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:25:12,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:12,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:25:12,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:25:12,172 INFO L87 Difference]: Start difference. First operand 6087 states and 26207 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:15,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:15,993 INFO L93 Difference]: Finished difference Result 6485 states and 27698 transitions. [2021-08-12 19:25:15,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:25:15,993 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:25:15,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:16,013 INFO L225 Difference]: With dead ends: 6485 [2021-08-12 19:25:16,013 INFO L226 Difference]: Without dead ends: 6469 [2021-08-12 19:25:16,014 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1025.1ms TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:25:16,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6469 states. [2021-08-12 19:25:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6469 to 6073. [2021-08-12 19:25:16,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6073 states, 6072 states have (on average 4.308959156785244) internal successors, (26164), 6072 states have internal predecessors, (26164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6073 states to 6073 states and 26164 transitions. [2021-08-12 19:25:16,766 INFO L78 Accepts]: Start accepts. Automaton has 6073 states and 26164 transitions. Word has length 33 [2021-08-12 19:25:16,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:16,766 INFO L482 AbstractCegarLoop]: Abstraction has 6073 states and 26164 transitions. [2021-08-12 19:25:16,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:16,766 INFO L276 IsEmpty]: Start isEmpty. Operand 6073 states and 26164 transitions. [2021-08-12 19:25:16,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:25:16,775 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:16,775 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:16,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-12 19:25:16,976 INFO L430 AbstractCegarLoop]: === Iteration 132 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:16,976 INFO L82 PathProgramCache]: Analyzing trace with hash -941434896, now seen corresponding path program 51 times [2021-08-12 19:25:16,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:16,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877364380] [2021-08-12 19:25:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:17,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:17,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877364380] [2021-08-12 19:25:17,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877364380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:17,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137293101] [2021-08-12 19:25:17,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:17,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:25:17,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:17,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:25:17,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:17,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:25:17,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-12 19:25:17,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:25:17,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:25:17,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:25:17,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-08-12 19:25:17,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:17,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137293101] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:17,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:17,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-12 19:25:17,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034111298] [2021-08-12 19:25:17,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:25:17,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:17,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:25:17,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:25:17,567 INFO L87 Difference]: Start difference. First operand 6073 states and 26164 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:21,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:21,470 INFO L93 Difference]: Finished difference Result 6648 states and 28419 transitions. [2021-08-12 19:25:21,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 19:25:21,470 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:25:21,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:21,490 INFO L225 Difference]: With dead ends: 6648 [2021-08-12 19:25:21,490 INFO L226 Difference]: Without dead ends: 6627 [2021-08-12 19:25:21,491 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1074.3ms TimeCoverageRelationStatistics Valid=173, Invalid=1387, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:25:21,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6627 states. [2021-08-12 19:25:22,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6627 to 6073. [2021-08-12 19:25:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6073 states, 6072 states have (on average 4.308959156785244) internal successors, (26164), 6072 states have internal predecessors, (26164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:22,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6073 states to 6073 states and 26164 transitions. [2021-08-12 19:25:22,246 INFO L78 Accepts]: Start accepts. Automaton has 6073 states and 26164 transitions. Word has length 33 [2021-08-12 19:25:22,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:22,246 INFO L482 AbstractCegarLoop]: Abstraction has 6073 states and 26164 transitions. [2021-08-12 19:25:22,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:22,246 INFO L276 IsEmpty]: Start isEmpty. Operand 6073 states and 26164 transitions. [2021-08-12 19:25:22,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:25:22,256 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:22,256 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:22,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-08-12 19:25:22,456 INFO L430 AbstractCegarLoop]: === Iteration 133 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:22,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:22,457 INFO L82 PathProgramCache]: Analyzing trace with hash 755646114, now seen corresponding path program 52 times [2021-08-12 19:25:22,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:22,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482861450] [2021-08-12 19:25:22,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:22,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:22,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482861450] [2021-08-12 19:25:22,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482861450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:22,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985012002] [2021-08-12 19:25:22,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:22,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:25:22,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:22,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:25:22,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:22,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:25:22,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-08-12 19:25:22,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:25:22,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:25:22,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:25:22,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-08-12 19:25:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:22,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985012002] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:22,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:22,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-12 19:25:22,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085565581] [2021-08-12 19:25:22,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:25:22,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:22,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:25:22,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:25:22,997 INFO L87 Difference]: Start difference. First operand 6073 states and 26164 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:27,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:27,501 INFO L93 Difference]: Finished difference Result 7067 states and 30044 transitions. [2021-08-12 19:25:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:25:27,502 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:25:27,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:27,522 INFO L225 Difference]: With dead ends: 7067 [2021-08-12 19:25:27,522 INFO L226 Difference]: Without dead ends: 7030 [2021-08-12 19:25:27,523 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1015.6ms TimeCoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:25:27,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7030 states. [2021-08-12 19:25:28,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7030 to 6011. [2021-08-12 19:25:28,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6011 states, 6010 states have (on average 4.31297836938436) internal successors, (25921), 6010 states have internal predecessors, (25921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6011 states to 6011 states and 25921 transitions. [2021-08-12 19:25:28,335 INFO L78 Accepts]: Start accepts. Automaton has 6011 states and 25921 transitions. Word has length 33 [2021-08-12 19:25:28,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:28,335 INFO L482 AbstractCegarLoop]: Abstraction has 6011 states and 25921 transitions. [2021-08-12 19:25:28,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 6011 states and 25921 transitions. [2021-08-12 19:25:28,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:25:28,344 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:28,344 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:28,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:28,548 INFO L430 AbstractCegarLoop]: === Iteration 134 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:28,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:28,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1043651872, now seen corresponding path program 53 times [2021-08-12 19:25:28,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:28,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510157834] [2021-08-12 19:25:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:28,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:28,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510157834] [2021-08-12 19:25:28,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510157834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:28,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208161832] [2021-08-12 19:25:28,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:28,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:25:28,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:28,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:25:28,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:28,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-12 19:25:28,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:25:28,893 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:25:28,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:25:28,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-08-12 19:25:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:29,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208161832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:29,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:29,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-12 19:25:29,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190476433] [2021-08-12 19:25:29,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:25:29,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:29,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:25:29,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:25:29,017 INFO L87 Difference]: Start difference. First operand 6011 states and 25921 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:33,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:33,689 INFO L93 Difference]: Finished difference Result 7568 states and 32118 transitions. [2021-08-12 19:25:33,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 19:25:33,689 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:25:33,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:33,711 INFO L225 Difference]: With dead ends: 7568 [2021-08-12 19:25:33,711 INFO L226 Difference]: Without dead ends: 7516 [2021-08-12 19:25:33,712 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1121.0ms TimeCoverageRelationStatistics Valid=319, Invalid=1751, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:25:33,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2021-08-12 19:25:34,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 6306. [2021-08-12 19:25:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6306 states, 6305 states have (on average 4.32244250594766) internal successors, (27253), 6305 states have internal predecessors, (27253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6306 states to 6306 states and 27253 transitions. [2021-08-12 19:25:34,500 INFO L78 Accepts]: Start accepts. Automaton has 6306 states and 27253 transitions. Word has length 33 [2021-08-12 19:25:34,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:34,500 INFO L482 AbstractCegarLoop]: Abstraction has 6306 states and 27253 transitions. [2021-08-12 19:25:34,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:34,501 INFO L276 IsEmpty]: Start isEmpty. Operand 6306 states and 27253 transitions. [2021-08-12 19:25:34,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:25:34,511 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:34,511 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:34,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:34,712 INFO L430 AbstractCegarLoop]: === Iteration 135 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:34,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:34,712 INFO L82 PathProgramCache]: Analyzing trace with hash 259620734, now seen corresponding path program 54 times [2021-08-12 19:25:34,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:34,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229661578] [2021-08-12 19:25:34,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:34,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:34,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:34,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:34,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229661578] [2021-08-12 19:25:34,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229661578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:34,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224416602] [2021-08-12 19:25:34,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:34,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:25:34,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:34,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:25:34,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:35,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:25:35,120 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-08-12 19:25:35,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-08-12 19:25:35,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:25:35,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:25:35,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:25:35,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-08-12 19:25:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:35,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224416602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:35,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:35,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-12 19:25:35,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094041771] [2021-08-12 19:25:35,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:25:35,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:35,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:25:35,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:25:35,323 INFO L87 Difference]: Start difference. First operand 6306 states and 27253 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:39,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:39,794 INFO L93 Difference]: Finished difference Result 7088 states and 30139 transitions. [2021-08-12 19:25:39,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 19:25:39,795 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:25:39,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:39,816 INFO L225 Difference]: With dead ends: 7088 [2021-08-12 19:25:39,817 INFO L226 Difference]: Without dead ends: 7064 [2021-08-12 19:25:39,818 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1177.1ms TimeCoverageRelationStatistics Valid=321, Invalid=1935, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 19:25:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7064 states. [2021-08-12 19:25:40,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7064 to 6315. [2021-08-12 19:25:40,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6315 states, 6314 states have (on average 4.31913208742477) internal successors, (27271), 6314 states have internal predecessors, (27271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 27271 transitions. [2021-08-12 19:25:40,652 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 27271 transitions. Word has length 33 [2021-08-12 19:25:40,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:40,652 INFO L482 AbstractCegarLoop]: Abstraction has 6315 states and 27271 transitions. [2021-08-12 19:25:40,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:40,652 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 27271 transitions. [2021-08-12 19:25:40,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:25:40,662 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:40,662 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:40,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:40,862 INFO L430 AbstractCegarLoop]: === Iteration 136 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:40,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:40,863 INFO L82 PathProgramCache]: Analyzing trace with hash -639741338, now seen corresponding path program 55 times [2021-08-12 19:25:40,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:40,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164440024] [2021-08-12 19:25:40,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:41,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:41,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164440024] [2021-08-12 19:25:41,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164440024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:41,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934217193] [2021-08-12 19:25:41,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:41,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:25:41,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:41,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:25:41,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-08-12 19:25:41,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:25:41,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:25:41,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:25:41,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-08-12 19:25:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:41,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934217193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:41,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:41,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-12 19:25:41,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837640083] [2021-08-12 19:25:41,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:25:41,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:41,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:25:41,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:25:41,466 INFO L87 Difference]: Start difference. First operand 6315 states and 27271 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:41,994 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-08-12 19:25:47,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:47,606 INFO L93 Difference]: Finished difference Result 7849 states and 33034 transitions. [2021-08-12 19:25:47,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-12 19:25:47,607 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:25:47,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:47,631 INFO L225 Difference]: With dead ends: 7849 [2021-08-12 19:25:47,631 INFO L226 Difference]: Without dead ends: 7796 [2021-08-12 19:25:47,633 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 1978.2ms TimeCoverageRelationStatistics Valid=463, Invalid=2959, Unknown=0, NotChecked=0, Total=3422 [2021-08-12 19:25:47,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7796 states. [2021-08-12 19:25:48,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7796 to 6274. [2021-08-12 19:25:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6274 states, 6273 states have (on average 4.320102024549657) internal successors, (27100), 6273 states have internal predecessors, (27100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:48,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6274 states to 6274 states and 27100 transitions. [2021-08-12 19:25:48,482 INFO L78 Accepts]: Start accepts. Automaton has 6274 states and 27100 transitions. Word has length 33 [2021-08-12 19:25:48,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:48,482 INFO L482 AbstractCegarLoop]: Abstraction has 6274 states and 27100 transitions. [2021-08-12 19:25:48,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:48,482 INFO L276 IsEmpty]: Start isEmpty. Operand 6274 states and 27100 transitions. [2021-08-12 19:25:48,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:25:48,493 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:48,493 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:48,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-12 19:25:48,694 INFO L430 AbstractCegarLoop]: === Iteration 137 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:48,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:48,694 INFO L82 PathProgramCache]: Analyzing trace with hash -2025903986, now seen corresponding path program 56 times [2021-08-12 19:25:48,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:48,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038392876] [2021-08-12 19:25:48,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:48,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:48,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038392876] [2021-08-12 19:25:48,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038392876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:48,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609100576] [2021-08-12 19:25:48,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:48,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:25:48,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:48,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-12 19:25:48,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:49,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:25:49,116 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 [2021-08-12 19:25:49,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:25:49,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:25:49,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:25:49,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-08-12 19:25:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:49,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609100576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:49,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:49,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-08-12 19:25:49,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262527831] [2021-08-12 19:25:49,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:25:49,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:25:49,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:25:49,341 INFO L87 Difference]: Start difference. First operand 6274 states and 27100 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:25:56,082 INFO L93 Difference]: Finished difference Result 7832 states and 32408 transitions. [2021-08-12 19:25:56,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 19:25:56,082 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:25:56,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:25:56,108 INFO L225 Difference]: With dead ends: 7832 [2021-08-12 19:25:56,108 INFO L226 Difference]: Without dead ends: 7800 [2021-08-12 19:25:56,109 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 2395.9ms TimeCoverageRelationStatistics Valid=379, Invalid=3043, Unknown=0, NotChecked=0, Total=3422 [2021-08-12 19:25:56,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2021-08-12 19:25:56,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6304. [2021-08-12 19:25:56,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6304 states, 6303 states have (on average 4.32206885610027) internal successors, (27242), 6303 states have internal predecessors, (27242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:56,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6304 states to 6304 states and 27242 transitions. [2021-08-12 19:25:56,937 INFO L78 Accepts]: Start accepts. Automaton has 6304 states and 27242 transitions. Word has length 33 [2021-08-12 19:25:56,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:25:56,937 INFO L482 AbstractCegarLoop]: Abstraction has 6304 states and 27242 transitions. [2021-08-12 19:25:56,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:25:56,937 INFO L276 IsEmpty]: Start isEmpty. Operand 6304 states and 27242 transitions. [2021-08-12 19:25:56,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:25:56,948 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:25:56,948 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:25:57,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-12 19:25:57,149 INFO L430 AbstractCegarLoop]: === Iteration 138 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:25:57,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:25:57,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1220290908, now seen corresponding path program 57 times [2021-08-12 19:25:57,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:25:57,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154455418] [2021-08-12 19:25:57,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:25:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:25:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:57,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:25:57,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154455418] [2021-08-12 19:25:57,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154455418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:57,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089955576] [2021-08-12 19:25:57,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:25:57,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:25:57,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:25:57,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:25:57,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:25:57,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:25:57,555 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-08-12 19:25:57,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-08-12 19:25:57,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:25:57,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:25:57,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:25:57,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-08-12 19:25:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:25:57,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089955576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:25:57,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:25:57,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-12 19:25:57,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809046313] [2021-08-12 19:25:57,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:25:57,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:25:57,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:25:57,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:25:57,780 INFO L87 Difference]: Start difference. First operand 6304 states and 27242 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:03,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:03,273 INFO L93 Difference]: Finished difference Result 7677 states and 32396 transitions. [2021-08-12 19:26:03,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-12 19:26:03,274 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:26:03,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:03,339 INFO L225 Difference]: With dead ends: 7677 [2021-08-12 19:26:03,339 INFO L226 Difference]: Without dead ends: 7613 [2021-08-12 19:26:03,341 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1794.8ms TimeCoverageRelationStatistics Valid=402, Invalid=2790, Unknown=0, NotChecked=0, Total=3192 [2021-08-12 19:26:03,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7613 states. [2021-08-12 19:26:04,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7613 to 6435. [2021-08-12 19:26:04,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6435 states, 6434 states have (on average 4.327012744793286) internal successors, (27840), 6434 states have internal predecessors, (27840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6435 states to 6435 states and 27840 transitions. [2021-08-12 19:26:04,163 INFO L78 Accepts]: Start accepts. Automaton has 6435 states and 27840 transitions. Word has length 33 [2021-08-12 19:26:04,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:04,163 INFO L482 AbstractCegarLoop]: Abstraction has 6435 states and 27840 transitions. [2021-08-12 19:26:04,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:04,163 INFO L276 IsEmpty]: Start isEmpty. Operand 6435 states and 27840 transitions. [2021-08-12 19:26:04,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:26:04,175 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:04,175 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:04,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-12 19:26:04,375 INFO L430 AbstractCegarLoop]: === Iteration 139 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:04,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:04,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1771403782, now seen corresponding path program 58 times [2021-08-12 19:26:04,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:04,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638318654] [2021-08-12 19:26:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:04,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:04,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638318654] [2021-08-12 19:26:04,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638318654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:04,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414001561] [2021-08-12 19:26:04,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:04,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:26:04,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:04,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:26:04,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:04,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-12 19:26:04,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:04,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:04,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:04,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-08-12 19:26:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:04,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414001561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:04,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:04,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-12 19:26:04,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6262477] [2021-08-12 19:26:04,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:26:04,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:04,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:26:04,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:26:04,879 INFO L87 Difference]: Start difference. First operand 6435 states and 27840 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:09,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:09,430 INFO L93 Difference]: Finished difference Result 7807 states and 32979 transitions. [2021-08-12 19:26:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 19:26:09,430 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:26:09,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:09,453 INFO L225 Difference]: With dead ends: 7807 [2021-08-12 19:26:09,453 INFO L226 Difference]: Without dead ends: 7781 [2021-08-12 19:26:09,454 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 857.2ms TimeCoverageRelationStatistics Valid=267, Invalid=1455, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:26:09,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7781 states. [2021-08-12 19:26:10,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7781 to 6489. [2021-08-12 19:26:10,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6489 states, 6488 states have (on average 4.331072749691739) internal successors, (28100), 6488 states have internal predecessors, (28100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:10,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6489 states to 6489 states and 28100 transitions. [2021-08-12 19:26:10,320 INFO L78 Accepts]: Start accepts. Automaton has 6489 states and 28100 transitions. Word has length 33 [2021-08-12 19:26:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:10,320 INFO L482 AbstractCegarLoop]: Abstraction has 6489 states and 28100 transitions. [2021-08-12 19:26:10,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 6489 states and 28100 transitions. [2021-08-12 19:26:10,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:26:10,331 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:10,331 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:10,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:10,532 INFO L430 AbstractCegarLoop]: === Iteration 140 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:10,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:10,532 INFO L82 PathProgramCache]: Analyzing trace with hash 855170072, now seen corresponding path program 59 times [2021-08-12 19:26:10,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:10,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135447823] [2021-08-12 19:26:10,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:10,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:10,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135447823] [2021-08-12 19:26:10,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135447823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:10,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212657681] [2021-08-12 19:26:10,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:10,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 19:26:10,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:10,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:26:10,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:10,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:26:10,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-08-12 19:26:10,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:10,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:10,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:10,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-08-12 19:26:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:10,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212657681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:10,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:10,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-12 19:26:10,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830679596] [2021-08-12 19:26:10,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:26:10,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:10,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:26:10,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:26:10,998 INFO L87 Difference]: Start difference. First operand 6489 states and 28100 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:15,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:15,601 INFO L93 Difference]: Finished difference Result 7829 states and 33036 transitions. [2021-08-12 19:26:15,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 19:26:15,601 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:26:15,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:15,623 INFO L225 Difference]: With dead ends: 7829 [2021-08-12 19:26:15,624 INFO L226 Difference]: Without dead ends: 7771 [2021-08-12 19:26:15,625 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 795.0ms TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:26:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2021-08-12 19:26:16,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 6483. [2021-08-12 19:26:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6483 states, 6482 states have (on average 4.333076211045974) internal successors, (28087), 6482 states have internal predecessors, (28087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:16,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 28087 transitions. [2021-08-12 19:26:16,524 INFO L78 Accepts]: Start accepts. Automaton has 6483 states and 28087 transitions. Word has length 33 [2021-08-12 19:26:16,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:16,524 INFO L482 AbstractCegarLoop]: Abstraction has 6483 states and 28087 transitions. [2021-08-12 19:26:16,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:16,524 INFO L276 IsEmpty]: Start isEmpty. Operand 6483 states and 28087 transitions. [2021-08-12 19:26:16,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:26:16,535 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:16,535 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:16,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-08-12 19:26:16,735 INFO L430 AbstractCegarLoop]: === Iteration 141 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:16,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:16,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1739523228, now seen corresponding path program 60 times [2021-08-12 19:26:16,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:16,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965070966] [2021-08-12 19:26:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:16,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:16,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965070966] [2021-08-12 19:26:16,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965070966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:16,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344697411] [2021-08-12 19:26:16,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:16,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 19:26:16,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:16,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:26:16,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:17,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:26:17,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:17,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 31 [2021-08-12 19:26:17,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:17,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:17,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:17,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:33 [2021-08-12 19:26:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:17,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344697411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:17,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:17,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-12 19:26:17,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776537183] [2021-08-12 19:26:17,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:26:17,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:17,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:26:17,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:26:17,343 INFO L87 Difference]: Start difference. First operand 6483 states and 28087 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:21,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:21,651 INFO L93 Difference]: Finished difference Result 6952 states and 29844 transitions. [2021-08-12 19:26:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 19:26:21,652 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:26:21,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:21,673 INFO L225 Difference]: With dead ends: 6952 [2021-08-12 19:26:21,674 INFO L226 Difference]: Without dead ends: 6891 [2021-08-12 19:26:21,676 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1343.1ms TimeCoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:26:21,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6891 states. [2021-08-12 19:26:22,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6891 to 6471. [2021-08-12 19:26:22,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6471 states, 6470 states have (on average 4.332921174652241) internal successors, (28034), 6470 states have internal predecessors, (28034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:22,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6471 states to 6471 states and 28034 transitions. [2021-08-12 19:26:22,553 INFO L78 Accepts]: Start accepts. Automaton has 6471 states and 28034 transitions. Word has length 33 [2021-08-12 19:26:22,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:22,553 INFO L482 AbstractCegarLoop]: Abstraction has 6471 states and 28034 transitions. [2021-08-12 19:26:22,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:22,554 INFO L276 IsEmpty]: Start isEmpty. Operand 6471 states and 28034 transitions. [2021-08-12 19:26:22,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:26:22,564 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:22,564 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:22,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-12 19:26:22,765 INFO L430 AbstractCegarLoop]: === Iteration 142 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:22,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:22,765 INFO L82 PathProgramCache]: Analyzing trace with hash -639895564, now seen corresponding path program 61 times [2021-08-12 19:26:22,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:22,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047272299] [2021-08-12 19:26:22,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:22,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:22,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047272299] [2021-08-12 19:26:22,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047272299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:22,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992739436] [2021-08-12 19:26:22,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:22,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:26:22,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:23,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:26:23,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-08-12 19:26:23,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:23,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:23,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:23,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-08-12 19:26:23,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:23,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992739436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:23,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:23,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-12 19:26:23,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618689610] [2021-08-12 19:26:23,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:26:23,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:23,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:26:23,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:26:23,200 INFO L87 Difference]: Start difference. First operand 6471 states and 28034 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:28,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:28,707 INFO L93 Difference]: Finished difference Result 8472 states and 35742 transitions. [2021-08-12 19:26:28,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 19:26:28,708 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:26:28,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:28,734 INFO L225 Difference]: With dead ends: 8472 [2021-08-12 19:26:28,734 INFO L226 Difference]: Without dead ends: 8420 [2021-08-12 19:26:28,736 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1075.2ms TimeCoverageRelationStatistics Valid=304, Invalid=1952, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 19:26:28,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8420 states. [2021-08-12 19:26:29,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8420 to 6765. [2021-08-12 19:26:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6765 states, 6764 states have (on average 4.344766410408043) internal successors, (29388), 6764 states have internal predecessors, (29388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6765 states to 6765 states and 29388 transitions. [2021-08-12 19:26:29,598 INFO L78 Accepts]: Start accepts. Automaton has 6765 states and 29388 transitions. Word has length 33 [2021-08-12 19:26:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:29,599 INFO L482 AbstractCegarLoop]: Abstraction has 6765 states and 29388 transitions. [2021-08-12 19:26:29,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 6765 states and 29388 transitions. [2021-08-12 19:26:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:26:29,610 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:29,610 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:29,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-08-12 19:26:29,811 INFO L430 AbstractCegarLoop]: === Iteration 143 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:29,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:29,811 INFO L82 PathProgramCache]: Analyzing trace with hash 663377042, now seen corresponding path program 62 times [2021-08-12 19:26:29,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:29,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053945765] [2021-08-12 19:26:29,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:29,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:29,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053945765] [2021-08-12 19:26:29,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053945765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:29,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188423975] [2021-08-12 19:26:29,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:30,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:26:30,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:30,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:26:30,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:30,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:26:30,205 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-08-12 19:26:30,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-08-12 19:26:30,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:26:30,250 INFO L628 ElimStorePlain]: treesize reduction 74, result has 22.9 percent of original size [2021-08-12 19:26:30,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:30,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-08-12 19:26:30,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:30,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188423975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:30,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:30,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-12 19:26:30,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132162205] [2021-08-12 19:26:30,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:26:30,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:30,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:26:30,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:26:30,386 INFO L87 Difference]: Start difference. First operand 6765 states and 29388 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:35,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:35,688 INFO L93 Difference]: Finished difference Result 8083 states and 34211 transitions. [2021-08-12 19:26:35,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 19:26:35,688 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:26:35,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:35,712 INFO L225 Difference]: With dead ends: 8083 [2021-08-12 19:26:35,712 INFO L226 Difference]: Without dead ends: 8059 [2021-08-12 19:26:35,714 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1155.5ms TimeCoverageRelationStatistics Valid=339, Invalid=2417, Unknown=0, NotChecked=0, Total=2756 [2021-08-12 19:26:35,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8059 states. [2021-08-12 19:26:36,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8059 to 6725. [2021-08-12 19:26:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6725 states, 6724 states have (on average 4.343694229625223) internal successors, (29207), 6724 states have internal predecessors, (29207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6725 states to 6725 states and 29207 transitions. [2021-08-12 19:26:36,572 INFO L78 Accepts]: Start accepts. Automaton has 6725 states and 29207 transitions. Word has length 33 [2021-08-12 19:26:36,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:36,573 INFO L482 AbstractCegarLoop]: Abstraction has 6725 states and 29207 transitions. [2021-08-12 19:26:36,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:36,573 INFO L276 IsEmpty]: Start isEmpty. Operand 6725 states and 29207 transitions. [2021-08-12 19:26:36,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:26:36,584 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:36,584 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:36,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-12 19:26:36,784 INFO L430 AbstractCegarLoop]: === Iteration 144 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:36,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:36,785 INFO L82 PathProgramCache]: Analyzing trace with hash -235985030, now seen corresponding path program 63 times [2021-08-12 19:26:36,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:36,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114587816] [2021-08-12 19:26:36,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:36,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:36,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:36,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114587816] [2021-08-12 19:26:36,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114587816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:36,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931590391] [2021-08-12 19:26:36,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:37,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:26:37,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:37,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:26:37,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:37,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:26:37,250 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-08-12 19:26:37,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-08-12 19:26:37,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:26:37,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:37,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:37,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-08-12 19:26:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:37,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931590391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:37,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:37,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-12 19:26:37,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605594865] [2021-08-12 19:26:37,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:26:37,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:37,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:26:37,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:26:37,459 INFO L87 Difference]: Start difference. First operand 6725 states and 29207 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:38,252 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-08-12 19:26:44,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:44,320 INFO L93 Difference]: Finished difference Result 8078 states and 34228 transitions. [2021-08-12 19:26:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-12 19:26:44,321 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:26:44,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:44,344 INFO L225 Difference]: With dead ends: 8078 [2021-08-12 19:26:44,344 INFO L226 Difference]: Without dead ends: 8046 [2021-08-12 19:26:44,346 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 2605.0ms TimeCoverageRelationStatistics Valid=483, Invalid=4073, Unknown=0, NotChecked=0, Total=4556 [2021-08-12 19:26:44,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8046 states. [2021-08-12 19:26:45,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8046 to 6676. [2021-08-12 19:26:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6676 states, 6675 states have (on average 4.3417228464419475) internal successors, (28981), 6675 states have internal predecessors, (28981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6676 states to 6676 states and 28981 transitions. [2021-08-12 19:26:45,251 INFO L78 Accepts]: Start accepts. Automaton has 6676 states and 28981 transitions. Word has length 33 [2021-08-12 19:26:45,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:45,251 INFO L482 AbstractCegarLoop]: Abstraction has 6676 states and 28981 transitions. [2021-08-12 19:26:45,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:45,251 INFO L276 IsEmpty]: Start isEmpty. Operand 6676 states and 28981 transitions. [2021-08-12 19:26:45,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:26:45,262 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:45,262 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:45,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-08-12 19:26:45,463 INFO L430 AbstractCegarLoop]: === Iteration 145 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:45,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:45,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2016583332, now seen corresponding path program 64 times [2021-08-12 19:26:45,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:45,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803864683] [2021-08-12 19:26:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:45,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:45,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803864683] [2021-08-12 19:26:45,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803864683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:45,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096343537] [2021-08-12 19:26:45,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:45,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:26:45,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:45,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:26:45,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:45,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:26:45,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-08-12 19:26:45,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:45,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:45,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:45,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-08-12 19:26:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:45,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096343537] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:45,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:45,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-12 19:26:45,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158954425] [2021-08-12 19:26:45,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:26:45,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:45,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:26:45,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:26:45,977 INFO L87 Difference]: Start difference. First operand 6676 states and 28981 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:52,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:52,422 INFO L93 Difference]: Finished difference Result 8756 states and 36822 transitions. [2021-08-12 19:26:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 19:26:52,423 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:26:52,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:52,448 INFO L225 Difference]: With dead ends: 8756 [2021-08-12 19:26:52,448 INFO L226 Difference]: Without dead ends: 8710 [2021-08-12 19:26:52,450 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1447.1ms TimeCoverageRelationStatistics Valid=408, Invalid=2672, Unknown=0, NotChecked=0, Total=3080 [2021-08-12 19:26:52,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8710 states. [2021-08-12 19:26:53,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8710 to 6742. [2021-08-12 19:26:53,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6742 states, 6741 states have (on average 4.34816792760718) internal successors, (29311), 6741 states have internal predecessors, (29311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:53,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6742 states to 6742 states and 29311 transitions. [2021-08-12 19:26:53,375 INFO L78 Accepts]: Start accepts. Automaton has 6742 states and 29311 transitions. Word has length 33 [2021-08-12 19:26:53,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:53,375 INFO L482 AbstractCegarLoop]: Abstraction has 6742 states and 29311 transitions. [2021-08-12 19:26:53,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:53,375 INFO L276 IsEmpty]: Start isEmpty. Operand 6742 states and 29311 transitions. [2021-08-12 19:26:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:26:53,386 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:53,386 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:53,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-08-12 19:26:53,587 INFO L430 AbstractCegarLoop]: === Iteration 146 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:53,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:53,587 INFO L82 PathProgramCache]: Analyzing trace with hash -120663244, now seen corresponding path program 65 times [2021-08-12 19:26:53,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:53,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951950602] [2021-08-12 19:26:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:53,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:53,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951950602] [2021-08-12 19:26:53,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951950602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:53,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677653762] [2021-08-12 19:26:53,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:53,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:26:53,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:53,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:26:53,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:26:53,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-08-12 19:26:53,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:26:53,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:26:53,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:26:53,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-08-12 19:26:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:54,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677653762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:54,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:26:54,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-12 19:26:54,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413714811] [2021-08-12 19:26:54,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:26:54,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:26:54,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:26:54,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:26:54,047 INFO L87 Difference]: Start difference. First operand 6742 states and 29311 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:58,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:26:58,565 INFO L93 Difference]: Finished difference Result 7480 states and 32073 transitions. [2021-08-12 19:26:58,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 19:26:58,565 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:26:58,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:26:58,587 INFO L225 Difference]: With dead ends: 7480 [2021-08-12 19:26:58,587 INFO L226 Difference]: Without dead ends: 7429 [2021-08-12 19:26:58,588 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 974.2ms TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:26:58,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7429 states. [2021-08-12 19:26:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7429 to 6727. [2021-08-12 19:26:59,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6727 states, 6726 states have (on average 4.349093071662207) internal successors, (29252), 6726 states have internal predecessors, (29252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:59,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6727 states to 6727 states and 29252 transitions. [2021-08-12 19:26:59,449 INFO L78 Accepts]: Start accepts. Automaton has 6727 states and 29252 transitions. Word has length 33 [2021-08-12 19:26:59,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:26:59,449 INFO L482 AbstractCegarLoop]: Abstraction has 6727 states and 29252 transitions. [2021-08-12 19:26:59,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:26:59,450 INFO L276 IsEmpty]: Start isEmpty. Operand 6727 states and 29252 transitions. [2021-08-12 19:26:59,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:26:59,460 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:26:59,461 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:26:59,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-12 19:26:59,665 INFO L430 AbstractCegarLoop]: === Iteration 147 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:26:59,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:26:59,665 INFO L82 PathProgramCache]: Analyzing trace with hash -364579814, now seen corresponding path program 66 times [2021-08-12 19:26:59,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:26:59,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19017075] [2021-08-12 19:26:59,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:26:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:26:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:26:59,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:26:59,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19017075] [2021-08-12 19:26:59,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19017075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:26:59,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551380456] [2021-08-12 19:26:59,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:26:59,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:26:59,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:26:59,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-12 19:26:59,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:00,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:27:00,238 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-08-12 19:27:00,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-08-12 19:27:00,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:27:00,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:27:00,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:00,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:20 [2021-08-12 19:27:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:00,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551380456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:00,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:00,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-12 19:27:00,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560331257] [2021-08-12 19:27:00,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:27:00,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:00,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:27:00,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:27:00,341 INFO L87 Difference]: Start difference. First operand 6727 states and 29252 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:04,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:04,996 INFO L93 Difference]: Finished difference Result 7341 states and 31511 transitions. [2021-08-12 19:27:04,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 19:27:04,997 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:27:04,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:05,019 INFO L225 Difference]: With dead ends: 7341 [2021-08-12 19:27:05,020 INFO L226 Difference]: Without dead ends: 7274 [2021-08-12 19:27:05,021 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1300.5ms TimeCoverageRelationStatistics Valid=201, Invalid=1961, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 19:27:05,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7274 states. [2021-08-12 19:27:05,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7274 to 6718. [2021-08-12 19:27:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6718 states, 6717 states have (on average 4.3476254280184605) internal successors, (29203), 6717 states have internal predecessors, (29203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6718 states to 6718 states and 29203 transitions. [2021-08-12 19:27:05,941 INFO L78 Accepts]: Start accepts. Automaton has 6718 states and 29203 transitions. Word has length 33 [2021-08-12 19:27:05,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:05,941 INFO L482 AbstractCegarLoop]: Abstraction has 6718 states and 29203 transitions. [2021-08-12 19:27:05,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 6718 states and 29203 transitions. [2021-08-12 19:27:05,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:27:05,953 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:05,953 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:06,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-12 19:27:06,154 INFO L430 AbstractCegarLoop]: === Iteration 148 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:06,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1671265466, now seen corresponding path program 67 times [2021-08-12 19:27:06,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:06,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991672108] [2021-08-12 19:27:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:06,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:06,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991672108] [2021-08-12 19:27:06,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991672108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:06,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428185155] [2021-08-12 19:27:06,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:06,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:27:06,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:06,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:27:06,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-08-12 19:27:06,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:06,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:27:06,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:06,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-08-12 19:27:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:06,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428185155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:06,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:06,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-12 19:27:06,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893992443] [2021-08-12 19:27:06,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:27:06,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:06,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:27:06,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:27:06,628 INFO L87 Difference]: Start difference. First operand 6718 states and 29203 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:12,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:12,006 INFO L93 Difference]: Finished difference Result 8159 states and 34666 transitions. [2021-08-12 19:27:12,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 19:27:12,006 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:27:12,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:12,029 INFO L225 Difference]: With dead ends: 8159 [2021-08-12 19:27:12,029 INFO L226 Difference]: Without dead ends: 8107 [2021-08-12 19:27:12,031 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1070.6ms TimeCoverageRelationStatistics Valid=277, Invalid=1793, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:27:12,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8107 states. [2021-08-12 19:27:12,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8107 to 6966. [2021-08-12 19:27:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6966 states, 6965 states have (on average 4.353481694185212) internal successors, (30322), 6965 states have internal predecessors, (30322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6966 states to 6966 states and 30322 transitions. [2021-08-12 19:27:12,935 INFO L78 Accepts]: Start accepts. Automaton has 6966 states and 30322 transitions. Word has length 33 [2021-08-12 19:27:12,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:12,935 INFO L482 AbstractCegarLoop]: Abstraction has 6966 states and 30322 transitions. [2021-08-12 19:27:12,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:12,935 INFO L276 IsEmpty]: Start isEmpty. Operand 6966 states and 30322 transitions. [2021-08-12 19:27:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:27:12,946 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:12,946 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:13,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:13,147 INFO L430 AbstractCegarLoop]: === Iteration 149 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:13,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1320429224, now seen corresponding path program 68 times [2021-08-12 19:27:13,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:13,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673703273] [2021-08-12 19:27:13,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:13,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:13,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673703273] [2021-08-12 19:27:13,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673703273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:13,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911617365] [2021-08-12 19:27:13,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:13,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:27:13,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:13,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:27:13,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:13,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:27:13,543 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-08-12 19:27:13,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-08-12 19:27:13,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:27:13,574 INFO L628 ElimStorePlain]: treesize reduction 88, result has 20.0 percent of original size [2021-08-12 19:27:13,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:13,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-08-12 19:27:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:13,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911617365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:13,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:13,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-12 19:27:13,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499292449] [2021-08-12 19:27:13,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:27:13,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:13,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:27:13,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:27:13,715 INFO L87 Difference]: Start difference. First operand 6966 states and 30322 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:19,030 INFO L93 Difference]: Finished difference Result 8102 states and 34393 transitions. [2021-08-12 19:27:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-12 19:27:19,031 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:27:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:19,054 INFO L225 Difference]: With dead ends: 8102 [2021-08-12 19:27:19,054 INFO L226 Difference]: Without dead ends: 8078 [2021-08-12 19:27:19,055 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1159.8ms TimeCoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 19:27:19,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8078 states. [2021-08-12 19:27:19,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8078 to 6917. [2021-08-12 19:27:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6917 states, 6916 states have (on average 4.353817235396183) internal successors, (30111), 6916 states have internal predecessors, (30111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:19,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6917 states to 6917 states and 30111 transitions. [2021-08-12 19:27:19,965 INFO L78 Accepts]: Start accepts. Automaton has 6917 states and 30111 transitions. Word has length 33 [2021-08-12 19:27:19,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:19,965 INFO L482 AbstractCegarLoop]: Abstraction has 6917 states and 30111 transitions. [2021-08-12 19:27:19,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 6917 states and 30111 transitions. [2021-08-12 19:27:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:27:19,977 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:19,977 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:20,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-08-12 19:27:20,177 INFO L430 AbstractCegarLoop]: === Iteration 150 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:20,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:20,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2075176000, now seen corresponding path program 69 times [2021-08-12 19:27:20,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:20,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124308251] [2021-08-12 19:27:20,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:20,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:20,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124308251] [2021-08-12 19:27:20,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124308251] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:20,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752194518] [2021-08-12 19:27:20,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:20,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 19:27:20,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:20,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:27:20,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:20,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:27:20,702 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-08-12 19:27:20,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-08-12 19:27:20,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:27:20,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:27:20,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:20,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:22 [2021-08-12 19:27:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:20,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752194518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:20,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:20,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-12 19:27:20,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929708988] [2021-08-12 19:27:20,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:27:20,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:20,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:27:20,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:27:20,854 INFO L87 Difference]: Start difference. First operand 6917 states and 30111 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:21,732 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2021-08-12 19:27:27,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:27,840 INFO L93 Difference]: Finished difference Result 7944 states and 34056 transitions. [2021-08-12 19:27:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-12 19:27:27,840 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:27:27,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:27,864 INFO L225 Difference]: With dead ends: 7944 [2021-08-12 19:27:27,864 INFO L226 Difference]: Without dead ends: 7927 [2021-08-12 19:27:27,865 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 2953.6ms TimeCoverageRelationStatistics Valid=491, Invalid=4201, Unknown=0, NotChecked=0, Total=4692 [2021-08-12 19:27:27,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-08-12 19:27:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 6917. [2021-08-12 19:27:28,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6917 states, 6916 states have (on average 4.353383458646617) internal successors, (30108), 6916 states have internal predecessors, (30108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6917 states to 6917 states and 30108 transitions. [2021-08-12 19:27:28,829 INFO L78 Accepts]: Start accepts. Automaton has 6917 states and 30108 transitions. Word has length 33 [2021-08-12 19:27:28,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:28,829 INFO L482 AbstractCegarLoop]: Abstraction has 6917 states and 30108 transitions. [2021-08-12 19:27:28,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:28,829 INFO L276 IsEmpty]: Start isEmpty. Operand 6917 states and 30108 transitions. [2021-08-12 19:27:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:27:28,841 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:28,841 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:29,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:29,041 INFO L430 AbstractCegarLoop]: === Iteration 151 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:29,041 INFO L82 PathProgramCache]: Analyzing trace with hash 294577698, now seen corresponding path program 70 times [2021-08-12 19:27:29,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:29,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289056812] [2021-08-12 19:27:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:29,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:29,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289056812] [2021-08-12 19:27:29,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289056812] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:29,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729604697] [2021-08-12 19:27:29,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:29,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:27:29,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:29,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:27:29,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:29,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:27:29,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-08-12 19:27:29,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:29,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:27:29,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:29,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-08-12 19:27:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:29,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729604697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:29,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:29,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-12 19:27:29,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471616730] [2021-08-12 19:27:29,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:27:29,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:29,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:27:29,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:27:29,517 INFO L87 Difference]: Start difference. First operand 6917 states and 30108 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:35,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:35,823 INFO L93 Difference]: Finished difference Result 8119 states and 34726 transitions. [2021-08-12 19:27:35,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 19:27:35,823 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:27:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:35,847 INFO L225 Difference]: With dead ends: 8119 [2021-08-12 19:27:35,847 INFO L226 Difference]: Without dead ends: 8082 [2021-08-12 19:27:35,848 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1742.3ms TimeCoverageRelationStatistics Valid=384, Invalid=2586, Unknown=0, NotChecked=0, Total=2970 [2021-08-12 19:27:35,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8082 states. [2021-08-12 19:27:36,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8082 to 6853. [2021-08-12 19:27:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 6852 states have (on average 4.355662580268535) internal successors, (29845), 6852 states have internal predecessors, (29845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 29845 transitions. [2021-08-12 19:27:36,767 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 29845 transitions. Word has length 33 [2021-08-12 19:27:36,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:36,767 INFO L482 AbstractCegarLoop]: Abstraction has 6853 states and 29845 transitions. [2021-08-12 19:27:36,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:36,767 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 29845 transitions. [2021-08-12 19:27:36,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:27:36,779 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:36,779 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:36,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:36,979 INFO L430 AbstractCegarLoop]: === Iteration 152 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:36,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:36,980 INFO L82 PathProgramCache]: Analyzing trace with hash -2104469510, now seen corresponding path program 71 times [2021-08-12 19:27:36,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:36,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190452045] [2021-08-12 19:27:36,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:37,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:37,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190452045] [2021-08-12 19:27:37,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190452045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:37,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513321968] [2021-08-12 19:27:37,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:37,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 19:27:37,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:37,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:27:37,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:37,341 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 [2021-08-12 19:27:37,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:37,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:27:37,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:37,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-08-12 19:27:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:37,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513321968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:37,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:37,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-12 19:27:37,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873583052] [2021-08-12 19:27:37,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:27:37,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:37,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:27:37,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:27:37,485 INFO L87 Difference]: Start difference. First operand 6853 states and 29845 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:42,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:42,390 INFO L93 Difference]: Finished difference Result 7508 states and 32237 transitions. [2021-08-12 19:27:42,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 19:27:42,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:27:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:42,413 INFO L225 Difference]: With dead ends: 7508 [2021-08-12 19:27:42,413 INFO L226 Difference]: Without dead ends: 7457 [2021-08-12 19:27:42,414 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1138.2ms TimeCoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 19:27:42,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7457 states. [2021-08-12 19:27:43,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7457 to 6808. [2021-08-12 19:27:43,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6808 states, 6807 states have (on average 4.354047304245629) internal successors, (29638), 6807 states have internal predecessors, (29638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:43,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6808 states to 6808 states and 29638 transitions. [2021-08-12 19:27:43,328 INFO L78 Accepts]: Start accepts. Automaton has 6808 states and 29638 transitions. Word has length 33 [2021-08-12 19:27:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:43,328 INFO L482 AbstractCegarLoop]: Abstraction has 6808 states and 29638 transitions. [2021-08-12 19:27:43,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:43,328 INFO L276 IsEmpty]: Start isEmpty. Operand 6808 states and 29638 transitions. [2021-08-12 19:27:43,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:27:43,339 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:43,340 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:43,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-08-12 19:27:43,540 INFO L430 AbstractCegarLoop]: === Iteration 153 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:43,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:43,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1946581216, now seen corresponding path program 72 times [2021-08-12 19:27:43,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:43,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664562361] [2021-08-12 19:27:43,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:43,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:43,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664562361] [2021-08-12 19:27:43,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664562361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:43,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602539637] [2021-08-12 19:27:43,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:43,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 19:27:43,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:43,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-12 19:27:43,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:44,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:27:44,033 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-08-12 19:27:44,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-08-12 19:27:44,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:27:44,066 INFO L628 ElimStorePlain]: treesize reduction 83, result has 21.0 percent of original size [2021-08-12 19:27:44,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:44,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:22 [2021-08-12 19:27:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:44,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602539637] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:44,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:44,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-12 19:27:44,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676075383] [2021-08-12 19:27:44,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:27:44,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:44,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:27:44,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:27:44,160 INFO L87 Difference]: Start difference. First operand 6808 states and 29638 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:49,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:49,374 INFO L93 Difference]: Finished difference Result 7478 states and 31987 transitions. [2021-08-12 19:27:49,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 19:27:49,374 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:27:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:49,397 INFO L225 Difference]: With dead ends: 7478 [2021-08-12 19:27:49,397 INFO L226 Difference]: Without dead ends: 7411 [2021-08-12 19:27:49,399 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1335.7ms TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 19:27:49,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2021-08-12 19:27:50,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 6766. [2021-08-12 19:27:50,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6766 states, 6765 states have (on average 4.349445676274945) internal successors, (29424), 6765 states have internal predecessors, (29424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:50,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6766 states to 6766 states and 29424 transitions. [2021-08-12 19:27:50,304 INFO L78 Accepts]: Start accepts. Automaton has 6766 states and 29424 transitions. Word has length 33 [2021-08-12 19:27:50,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:50,305 INFO L482 AbstractCegarLoop]: Abstraction has 6766 states and 29424 transitions. [2021-08-12 19:27:50,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:50,305 INFO L276 IsEmpty]: Start isEmpty. Operand 6766 states and 29424 transitions. [2021-08-12 19:27:50,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:27:50,316 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:50,316 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:50,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:50,517 INFO L430 AbstractCegarLoop]: === Iteration 154 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:50,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:50,517 INFO L82 PathProgramCache]: Analyzing trace with hash -193710086, now seen corresponding path program 73 times [2021-08-12 19:27:50,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:50,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974934100] [2021-08-12 19:27:50,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:50,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:50,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974934100] [2021-08-12 19:27:50,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974934100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:50,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619759906] [2021-08-12 19:27:50,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:50,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:50,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:27:50,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:50,918 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 [2021-08-12 19:27:50,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:27:50,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:27:50,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:50,922 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-08-12 19:27:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:50,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619759906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:50,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:50,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-12 19:27:50,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083305070] [2021-08-12 19:27:50,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:27:50,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:50,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:27:50,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:27:50,981 INFO L87 Difference]: Start difference. First operand 6766 states and 29424 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:55,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:27:55,178 INFO L93 Difference]: Finished difference Result 7143 states and 30731 transitions. [2021-08-12 19:27:55,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 19:27:55,179 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:27:55,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:27:55,201 INFO L225 Difference]: With dead ends: 7143 [2021-08-12 19:27:55,201 INFO L226 Difference]: Without dead ends: 7080 [2021-08-12 19:27:55,202 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 845.3ms TimeCoverageRelationStatistics Valid=137, Invalid=1269, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 19:27:55,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7080 states. [2021-08-12 19:27:56,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7080 to 6772. [2021-08-12 19:27:56,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6772 states, 6771 states have (on average 4.347954511888938) internal successors, (29440), 6771 states have internal predecessors, (29440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:56,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 29440 transitions. [2021-08-12 19:27:56,155 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 29440 transitions. Word has length 33 [2021-08-12 19:27:56,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:27:56,155 INFO L482 AbstractCegarLoop]: Abstraction has 6772 states and 29440 transitions. [2021-08-12 19:27:56,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:27:56,155 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 29440 transitions. [2021-08-12 19:27:56,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:27:56,166 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:27:56,166 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:27:56,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:56,367 INFO L430 AbstractCegarLoop]: === Iteration 155 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:27:56,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:27:56,367 INFO L82 PathProgramCache]: Analyzing trace with hash -644955254, now seen corresponding path program 74 times [2021-08-12 19:27:56,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:27:56,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534847162] [2021-08-12 19:27:56,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:27:56,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:27:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:56,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:27:56,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534847162] [2021-08-12 19:27:56,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534847162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:56,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274383900] [2021-08-12 19:27:56,534 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:27:56,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:27:56,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:27:56,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:27:56,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:27:56,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:27:56,853 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-08-12 19:27:56,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 61 [2021-08-12 19:27:56,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-08-12 19:27:56,885 INFO L628 ElimStorePlain]: treesize reduction 52, result has 29.7 percent of original size [2021-08-12 19:27:56,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:27:56,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:22 [2021-08-12 19:27:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:27:56,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274383900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:27:56,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:27:56,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-12 19:27:56,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623954760] [2021-08-12 19:27:56,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:27:56,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:27:56,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:27:56,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:27:56,980 INFO L87 Difference]: Start difference. First operand 6772 states and 29440 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:01,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:01,958 INFO L93 Difference]: Finished difference Result 7381 states and 31548 transitions. [2021-08-12 19:28:01,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 19:28:01,958 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:28:01,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:01,980 INFO L225 Difference]: With dead ends: 7381 [2021-08-12 19:28:01,980 INFO L226 Difference]: Without dead ends: 7314 [2021-08-12 19:28:01,981 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1167.2ms TimeCoverageRelationStatistics Valid=168, Invalid=1902, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 19:28:01,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7314 states. [2021-08-12 19:28:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7314 to 6745. [2021-08-12 19:28:02,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6745 states, 6744 states have (on average 4.347419928825623) internal successors, (29319), 6744 states have internal predecessors, (29319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:02,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6745 states to 6745 states and 29319 transitions. [2021-08-12 19:28:02,933 INFO L78 Accepts]: Start accepts. Automaton has 6745 states and 29319 transitions. Word has length 33 [2021-08-12 19:28:02,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:02,933 INFO L482 AbstractCegarLoop]: Abstraction has 6745 states and 29319 transitions. [2021-08-12 19:28:02,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:02,933 INFO L276 IsEmpty]: Start isEmpty. Operand 6745 states and 29319 transitions. [2021-08-12 19:28:02,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:28:02,944 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:02,944 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:03,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:03,145 INFO L430 AbstractCegarLoop]: === Iteration 156 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:03,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:03,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1096875184, now seen corresponding path program 75 times [2021-08-12 19:28:03,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:03,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184064487] [2021-08-12 19:28:03,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:03,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:03,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184064487] [2021-08-12 19:28:03,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184064487] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:03,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046079666] [2021-08-12 19:28:03,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:03,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:28:03,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:03,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:28:03,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:03,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:28:03,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-08-12 19:28:03,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:28:03,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:28:03,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:28:03,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:35 [2021-08-12 19:28:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:03,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046079666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:03,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:03,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-12 19:28:03,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572062979] [2021-08-12 19:28:03,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:28:03,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:03,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:28:03,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:28:03,694 INFO L87 Difference]: Start difference. First operand 6745 states and 29319 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:04,549 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2021-08-12 19:28:07,144 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2021-08-12 19:28:10,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:10,088 INFO L93 Difference]: Finished difference Result 8081 states and 34661 transitions. [2021-08-12 19:28:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 19:28:10,089 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:28:10,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:10,114 INFO L225 Difference]: With dead ends: 8081 [2021-08-12 19:28:10,115 INFO L226 Difference]: Without dead ends: 8060 [2021-08-12 19:28:10,116 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1973.2ms TimeCoverageRelationStatistics Valid=357, Invalid=1995, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 19:28:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8060 states. [2021-08-12 19:28:11,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8060 to 6853. [2021-08-12 19:28:11,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 6852 states have (on average 4.350992410974897) internal successors, (29813), 6852 states have internal predecessors, (29813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:11,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 29813 transitions. [2021-08-12 19:28:11,054 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 29813 transitions. Word has length 33 [2021-08-12 19:28:11,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:11,054 INFO L482 AbstractCegarLoop]: Abstraction has 6853 states and 29813 transitions. [2021-08-12 19:28:11,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:11,054 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 29813 transitions. [2021-08-12 19:28:11,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:28:11,066 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:11,066 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:11,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:11,266 INFO L430 AbstractCegarLoop]: === Iteration 157 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:11,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:11,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1894819506, now seen corresponding path program 76 times [2021-08-12 19:28:11,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:11,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181475092] [2021-08-12 19:28:11,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:11,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:11,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:11,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:11,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181475092] [2021-08-12 19:28:11,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181475092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:11,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383956092] [2021-08-12 19:28:11,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:11,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:28:11,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:11,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:28:11,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:11,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:28:11,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 12 [2021-08-12 19:28:11,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:28:11,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:28:11,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:28:11,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:12 [2021-08-12 19:28:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:11,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383956092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:11,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:11,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-12 19:28:11,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265236188] [2021-08-12 19:28:11,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:28:11,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:11,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:28:11,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:28:11,693 INFO L87 Difference]: Start difference. First operand 6853 states and 29813 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:17,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:17,196 INFO L93 Difference]: Finished difference Result 8586 states and 36477 transitions. [2021-08-12 19:28:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 19:28:17,197 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:28:17,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:17,223 INFO L225 Difference]: With dead ends: 8586 [2021-08-12 19:28:17,223 INFO L226 Difference]: Without dead ends: 8556 [2021-08-12 19:28:17,224 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 791.3ms TimeCoverageRelationStatistics Valid=257, Invalid=1465, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:28:17,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2021-08-12 19:28:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 6958. [2021-08-12 19:28:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6958 states, 6957 states have (on average 4.358919074313641) internal successors, (30325), 6957 states have internal predecessors, (30325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:18,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6958 states to 6958 states and 30325 transitions. [2021-08-12 19:28:18,243 INFO L78 Accepts]: Start accepts. Automaton has 6958 states and 30325 transitions. Word has length 33 [2021-08-12 19:28:18,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:18,243 INFO L482 AbstractCegarLoop]: Abstraction has 6958 states and 30325 transitions. [2021-08-12 19:28:18,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:18,243 INFO L276 IsEmpty]: Start isEmpty. Operand 6958 states and 30325 transitions. [2021-08-12 19:28:18,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:28:18,254 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:18,255 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:18,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-08-12 19:28:18,455 INFO L430 AbstractCegarLoop]: === Iteration 158 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:18,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:18,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1948206026, now seen corresponding path program 77 times [2021-08-12 19:28:18,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:18,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218358064] [2021-08-12 19:28:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:18,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:18,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218358064] [2021-08-12 19:28:18,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218358064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:18,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677470093] [2021-08-12 19:28:18,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:18,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:28:18,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:18,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:28:18,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:18,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-08-12 19:28:18,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:28:18,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:28:18,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:28:18,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:12 [2021-08-12 19:28:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:18,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677470093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:18,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:18,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-12 19:28:18,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65747318] [2021-08-12 19:28:18,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:28:18,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:18,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:28:18,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:28:18,855 INFO L87 Difference]: Start difference. First operand 6958 states and 30325 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:24,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:24,032 INFO L93 Difference]: Finished difference Result 8563 states and 36385 transitions. [2021-08-12 19:28:24,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 19:28:24,032 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:28:24,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:24,056 INFO L225 Difference]: With dead ends: 8563 [2021-08-12 19:28:24,057 INFO L226 Difference]: Without dead ends: 8528 [2021-08-12 19:28:24,058 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 730.5ms TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 19:28:24,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8528 states. [2021-08-12 19:28:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8528 to 6933. [2021-08-12 19:28:25,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6933 states, 6932 states have (on average 4.360357761107905) internal successors, (30226), 6932 states have internal predecessors, (30226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:25,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6933 states to 6933 states and 30226 transitions. [2021-08-12 19:28:25,061 INFO L78 Accepts]: Start accepts. Automaton has 6933 states and 30226 transitions. Word has length 33 [2021-08-12 19:28:25,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:25,061 INFO L482 AbstractCegarLoop]: Abstraction has 6933 states and 30226 transitions. [2021-08-12 19:28:25,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:25,061 INFO L276 IsEmpty]: Start isEmpty. Operand 6933 states and 30226 transitions. [2021-08-12 19:28:25,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:28:25,073 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:25,073 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:25,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:25,273 INFO L430 AbstractCegarLoop]: === Iteration 159 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:25,274 INFO L82 PathProgramCache]: Analyzing trace with hash 114623070, now seen corresponding path program 78 times [2021-08-12 19:28:25,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:25,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562499208] [2021-08-12 19:28:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:25,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:25,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562499208] [2021-08-12 19:28:25,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562499208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:25,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298324395] [2021-08-12 19:28:25,445 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:25,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:28:25,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:25,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-12 19:28:25,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:25,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:28:25,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-08-12 19:28:25,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:28:25,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:28:25,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:28:25,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:31 [2021-08-12 19:28:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:25,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298324395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:25,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:25,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-08-12 19:28:25,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951516352] [2021-08-12 19:28:25,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:28:25,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:25,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:28:25,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:28:25,813 INFO L87 Difference]: Start difference. First operand 6933 states and 30226 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:30,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:30,993 INFO L93 Difference]: Finished difference Result 7916 states and 34233 transitions. [2021-08-12 19:28:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 19:28:30,993 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:28:30,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:31,017 INFO L225 Difference]: With dead ends: 7916 [2021-08-12 19:28:31,017 INFO L226 Difference]: Without dead ends: 7899 [2021-08-12 19:28:31,018 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1160.9ms TimeCoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 19:28:31,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7899 states. [2021-08-12 19:28:31,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7899 to 6921. [2021-08-12 19:28:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6921 states, 6920 states have (on average 4.361705202312138) internal successors, (30183), 6920 states have internal predecessors, (30183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6921 states to 6921 states and 30183 transitions. [2021-08-12 19:28:32,019 INFO L78 Accepts]: Start accepts. Automaton has 6921 states and 30183 transitions. Word has length 33 [2021-08-12 19:28:32,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:32,019 INFO L482 AbstractCegarLoop]: Abstraction has 6921 states and 30183 transitions. [2021-08-12 19:28:32,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:32,019 INFO L276 IsEmpty]: Start isEmpty. Operand 6921 states and 30183 transitions. [2021-08-12 19:28:32,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:28:32,031 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:32,031 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:32,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:32,233 INFO L430 AbstractCegarLoop]: === Iteration 160 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:32,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:32,233 INFO L82 PathProgramCache]: Analyzing trace with hash -2104888460, now seen corresponding path program 79 times [2021-08-12 19:28:32,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:32,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23805527] [2021-08-12 19:28:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:32,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:32,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23805527] [2021-08-12 19:28:32,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23805527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:32,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089512881] [2021-08-12 19:28:32,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:32,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:28:32,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:32,650 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 [2021-08-12 19:28:32,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:28:32,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:28:32,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:28:32,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-08-12 19:28:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:32,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089512881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:32,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:32,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-12 19:28:32,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447047726] [2021-08-12 19:28:32,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:28:32,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:32,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:28:32,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:28:32,713 INFO L87 Difference]: Start difference. First operand 6921 states and 30183 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:37,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:37,383 INFO L93 Difference]: Finished difference Result 7737 states and 33464 transitions. [2021-08-12 19:28:37,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 19:28:37,384 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:28:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:37,407 INFO L225 Difference]: With dead ends: 7737 [2021-08-12 19:28:37,407 INFO L226 Difference]: Without dead ends: 7720 [2021-08-12 19:28:37,408 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 831.6ms TimeCoverageRelationStatistics Valid=190, Invalid=1532, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 19:28:37,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7720 states. [2021-08-12 19:28:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7720 to 6921. [2021-08-12 19:28:38,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6921 states, 6920 states have (on average 4.3621387283237) internal successors, (30186), 6920 states have internal predecessors, (30186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:38,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6921 states to 6921 states and 30186 transitions. [2021-08-12 19:28:38,413 INFO L78 Accepts]: Start accepts. Automaton has 6921 states and 30186 transitions. Word has length 33 [2021-08-12 19:28:38,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:38,413 INFO L482 AbstractCegarLoop]: Abstraction has 6921 states and 30186 transitions. [2021-08-12 19:28:38,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:38,413 INFO L276 IsEmpty]: Start isEmpty. Operand 6921 states and 30186 transitions. [2021-08-12 19:28:38,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:28:38,424 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:38,424 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:38,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:38,625 INFO L430 AbstractCegarLoop]: === Iteration 161 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:38,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:38,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1248804492, now seen corresponding path program 80 times [2021-08-12 19:28:38,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:38,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084123486] [2021-08-12 19:28:38,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:38,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:38,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084123486] [2021-08-12 19:28:38,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084123486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:38,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586410198] [2021-08-12 19:28:38,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:38,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:28:38,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:38,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:28:38,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:38,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:28:38,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-12 19:28:38,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:28:38,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:28:38,972 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:28:38,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-08-12 19:28:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:39,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586410198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:39,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:39,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-08-12 19:28:39,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042039108] [2021-08-12 19:28:39,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:28:39,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:39,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:28:39,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:28:39,196 INFO L87 Difference]: Start difference. First operand 6921 states and 30186 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:40,160 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2021-08-12 19:28:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:45,845 INFO L93 Difference]: Finished difference Result 7949 states and 34284 transitions. [2021-08-12 19:28:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-12 19:28:45,845 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:28:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:45,869 INFO L225 Difference]: With dead ends: 7949 [2021-08-12 19:28:45,869 INFO L226 Difference]: Without dead ends: 7928 [2021-08-12 19:28:45,870 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 2262.5ms TimeCoverageRelationStatistics Valid=425, Invalid=2227, Unknown=0, NotChecked=0, Total=2652 [2021-08-12 19:28:45,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7928 states. [2021-08-12 19:28:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7928 to 7007. [2021-08-12 19:28:46,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7007 states, 7006 states have (on average 4.363260062803311) internal successors, (30569), 7006 states have internal predecessors, (30569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 30569 transitions. [2021-08-12 19:28:46,832 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 30569 transitions. Word has length 33 [2021-08-12 19:28:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:46,833 INFO L482 AbstractCegarLoop]: Abstraction has 7007 states and 30569 transitions. [2021-08-12 19:28:46,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:46,833 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 30569 transitions. [2021-08-12 19:28:46,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:28:46,844 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:46,844 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:47,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-08-12 19:28:47,045 INFO L430 AbstractCegarLoop]: === Iteration 162 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:47,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:47,045 INFO L82 PathProgramCache]: Analyzing trace with hash 54468114, now seen corresponding path program 81 times [2021-08-12 19:28:47,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:47,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245862265] [2021-08-12 19:28:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:47,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:47,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245862265] [2021-08-12 19:28:47,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245862265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:47,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455456362] [2021-08-12 19:28:47,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:47,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 19:28:47,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:47,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:28:47,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:47,370 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:28:47,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-12 19:28:47,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:28:47,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:28:47,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:28:47,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-08-12 19:28:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:47,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455456362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:47,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:47,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-08-12 19:28:47,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337337101] [2021-08-12 19:28:47,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:28:47,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:47,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:28:47,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:28:47,597 INFO L87 Difference]: Start difference. First operand 7007 states and 30569 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:47,723 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 36 [2021-08-12 19:28:53,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:28:53,184 INFO L93 Difference]: Finished difference Result 7714 states and 33334 transitions. [2021-08-12 19:28:53,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 19:28:53,184 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:28:53,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:28:53,208 INFO L225 Difference]: With dead ends: 7714 [2021-08-12 19:28:53,208 INFO L226 Difference]: Without dead ends: 7699 [2021-08-12 19:28:53,209 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1755.5ms TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 19:28:53,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7699 states. [2021-08-12 19:28:54,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7699 to 6991. [2021-08-12 19:28:54,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 6990 states have (on average 4.365951359084407) internal successors, (30518), 6990 states have internal predecessors, (30518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 30518 transitions. [2021-08-12 19:28:54,167 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 30518 transitions. Word has length 33 [2021-08-12 19:28:54,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:28:54,167 INFO L482 AbstractCegarLoop]: Abstraction has 6991 states and 30518 transitions. [2021-08-12 19:28:54,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:28:54,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 30518 transitions. [2021-08-12 19:28:54,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:28:54,179 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:28:54,179 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:28:54,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-08-12 19:28:54,379 INFO L430 AbstractCegarLoop]: === Iteration 163 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:28:54,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:28:54,380 INFO L82 PathProgramCache]: Analyzing trace with hash -844893958, now seen corresponding path program 82 times [2021-08-12 19:28:54,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:28:54,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693514833] [2021-08-12 19:28:54,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:28:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:28:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:54,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:28:54,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693514833] [2021-08-12 19:28:54,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693514833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:54,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114627373] [2021-08-12 19:28:54,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:28:54,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 19:28:54,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:28:54,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:28:54,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:28:54,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-12 19:28:54,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:28:54,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:28:54,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:28:54,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:13 [2021-08-12 19:28:54,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:28:54,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114627373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:28:54,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:28:54,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-08-12 19:28:54,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934685486] [2021-08-12 19:28:54,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-08-12 19:28:54,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:28:54,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-12 19:28:54,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-08-12 19:28:54,867 INFO L87 Difference]: Start difference. First operand 6991 states and 30518 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:00,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:00,649 INFO L93 Difference]: Finished difference Result 8549 states and 36567 transitions. [2021-08-12 19:29:00,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 19:29:00,650 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:29:00,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:00,675 INFO L225 Difference]: With dead ends: 8549 [2021-08-12 19:29:00,675 INFO L226 Difference]: Without dead ends: 8517 [2021-08-12 19:29:00,676 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1226.1ms TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 19:29:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8517 states. [2021-08-12 19:29:01,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8517 to 7100. [2021-08-12 19:29:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7100 states, 7099 states have (on average 4.368643470911396) internal successors, (31013), 7099 states have internal predecessors, (31013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:01,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7100 states to 7100 states and 31013 transitions. [2021-08-12 19:29:01,704 INFO L78 Accepts]: Start accepts. Automaton has 7100 states and 31013 transitions. Word has length 33 [2021-08-12 19:29:01,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:01,704 INFO L482 AbstractCegarLoop]: Abstraction has 7100 states and 31013 transitions. [2021-08-12 19:29:01,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:01,704 INFO L276 IsEmpty]: Start isEmpty. Operand 7100 states and 31013 transitions. [2021-08-12 19:29:01,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:29:01,716 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:01,716 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:01,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-08-12 19:29:01,917 INFO L430 AbstractCegarLoop]: === Iteration 164 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:01,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:01,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1081594, now seen corresponding path program 83 times [2021-08-12 19:29:01,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:01,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168606797] [2021-08-12 19:29:01,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:02,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:02,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168606797] [2021-08-12 19:29:02,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168606797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:02,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932112913] [2021-08-12 19:29:02,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:02,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 19:29:02,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:02,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:29:02,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:02,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:29:02,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-08-12 19:29:02,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:29:02,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:02,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:29:02,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-08-12 19:29:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:02,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932112913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:02,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:02,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-08-12 19:29:02,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845382523] [2021-08-12 19:29:02,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 19:29:02,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:02,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 19:29:02,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-08-12 19:29:02,325 INFO L87 Difference]: Start difference. First operand 7100 states and 31013 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:07,561 INFO L93 Difference]: Finished difference Result 8301 states and 35567 transitions. [2021-08-12 19:29:07,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 19:29:07,562 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:29:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:07,586 INFO L225 Difference]: With dead ends: 8301 [2021-08-12 19:29:07,586 INFO L226 Difference]: Without dead ends: 8262 [2021-08-12 19:29:07,587 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 837.4ms TimeCoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 19:29:07,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8262 states. [2021-08-12 19:29:08,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8262 to 7060. [2021-08-12 19:29:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7060 states, 7059 states have (on average 4.370307408981442) internal successors, (30850), 7059 states have internal predecessors, (30850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7060 states to 7060 states and 30850 transitions. [2021-08-12 19:29:08,577 INFO L78 Accepts]: Start accepts. Automaton has 7060 states and 30850 transitions. Word has length 33 [2021-08-12 19:29:08,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:08,578 INFO L482 AbstractCegarLoop]: Abstraction has 7060 states and 30850 transitions. [2021-08-12 19:29:08,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:08,578 INFO L276 IsEmpty]: Start isEmpty. Operand 7060 states and 30850 transitions. [2021-08-12 19:29:08,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:29:08,590 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:08,590 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:08,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:08,791 INFO L430 AbstractCegarLoop]: === Iteration 165 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:08,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:08,791 INFO L82 PathProgramCache]: Analyzing trace with hash 2063910690, now seen corresponding path program 84 times [2021-08-12 19:29:08,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:08,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040442491] [2021-08-12 19:29:08,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:08,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:08,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040442491] [2021-08-12 19:29:08,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040442491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:08,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80546875] [2021-08-12 19:29:08,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:09,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 19:29:09,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:09,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-12 19:29:09,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:09,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-08-12 19:29:09,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:29:09,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:09,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:29:09,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2021-08-12 19:29:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:09,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80546875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:09,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:09,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-08-12 19:29:09,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106659555] [2021-08-12 19:29:09,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-08-12 19:29:09,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:09,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-12 19:29:09,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-08-12 19:29:09,372 INFO L87 Difference]: Start difference. First operand 7060 states and 30850 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:14,957 INFO L93 Difference]: Finished difference Result 8343 states and 35856 transitions. [2021-08-12 19:29:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 19:29:14,958 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:29:14,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:14,983 INFO L225 Difference]: With dead ends: 8343 [2021-08-12 19:29:14,983 INFO L226 Difference]: Without dead ends: 8245 [2021-08-12 19:29:14,984 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1298.4ms TimeCoverageRelationStatistics Valid=350, Invalid=2512, Unknown=0, NotChecked=0, Total=2862 [2021-08-12 19:29:14,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8245 states. [2021-08-12 19:29:15,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8245 to 7090. [2021-08-12 19:29:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7090 states, 7089 states have (on average 4.370856256171534) internal successors, (30985), 7089 states have internal predecessors, (30985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7090 states to 7090 states and 30985 transitions. [2021-08-12 19:29:16,032 INFO L78 Accepts]: Start accepts. Automaton has 7090 states and 30985 transitions. Word has length 33 [2021-08-12 19:29:16,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:16,033 INFO L482 AbstractCegarLoop]: Abstraction has 7090 states and 30985 transitions. [2021-08-12 19:29:16,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:16,033 INFO L276 IsEmpty]: Start isEmpty. Operand 7090 states and 30985 transitions. [2021-08-12 19:29:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:29:16,044 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:16,044 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:16,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-08-12 19:29:16,245 INFO L430 AbstractCegarLoop]: === Iteration 166 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:16,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1015138288, now seen corresponding path program 85 times [2021-08-12 19:29:16,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:16,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892497472] [2021-08-12 19:29:16,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:16,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:16,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892497472] [2021-08-12 19:29:16,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892497472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:16,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823668614] [2021-08-12 19:29:16,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:16,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:29:16,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:16,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:29:16,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-08-12 19:29:16,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:29:16,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:16,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:29:16,576 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-08-12 19:29:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:16,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823668614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:16,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:16,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-08-12 19:29:16,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605979473] [2021-08-12 19:29:16,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 19:29:16,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:16,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 19:29:16,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-08-12 19:29:16,663 INFO L87 Difference]: Start difference. First operand 7090 states and 30985 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:22,795 INFO L93 Difference]: Finished difference Result 8645 states and 37013 transitions. [2021-08-12 19:29:22,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 19:29:22,796 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:29:22,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:22,822 INFO L225 Difference]: With dead ends: 8645 [2021-08-12 19:29:22,822 INFO L226 Difference]: Without dead ends: 8605 [2021-08-12 19:29:22,823 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1308.9ms TimeCoverageRelationStatistics Valid=490, Invalid=2480, Unknown=0, NotChecked=0, Total=2970 [2021-08-12 19:29:22,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8605 states. [2021-08-12 19:29:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8605 to 7267. [2021-08-12 19:29:23,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7267 states, 7266 states have (on average 4.376548307184145) internal successors, (31800), 7266 states have internal predecessors, (31800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7267 states to 7267 states and 31800 transitions. [2021-08-12 19:29:23,902 INFO L78 Accepts]: Start accepts. Automaton has 7267 states and 31800 transitions. Word has length 33 [2021-08-12 19:29:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:23,902 INFO L482 AbstractCegarLoop]: Abstraction has 7267 states and 31800 transitions. [2021-08-12 19:29:23,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:23,902 INFO L276 IsEmpty]: Start isEmpty. Operand 7267 states and 31800 transitions. [2021-08-12 19:29:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:29:23,914 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:23,914 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:24,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-08-12 19:29:24,114 INFO L430 AbstractCegarLoop]: === Iteration 167 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:24,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:24,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1976556402, now seen corresponding path program 86 times [2021-08-12 19:29:24,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:24,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176199602] [2021-08-12 19:29:24,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:24,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:24,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176199602] [2021-08-12 19:29:24,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176199602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:24,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747116257] [2021-08-12 19:29:24,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:24,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 19:29:24,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:24,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-12 19:29:24,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:24,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:24,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-08-12 19:29:24,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:29:24,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:24,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:29:24,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-08-12 19:29:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:24,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747116257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:24,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:24,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-08-12 19:29:24,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528721759] [2021-08-12 19:29:24,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 19:29:24,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:24,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 19:29:24,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-08-12 19:29:24,671 INFO L87 Difference]: Start difference. First operand 7267 states and 31800 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 19:29:30,261 INFO L93 Difference]: Finished difference Result 8052 states and 34802 transitions. [2021-08-12 19:29:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 19:29:30,261 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-08-12 19:29:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 19:29:30,285 INFO L225 Difference]: With dead ends: 8052 [2021-08-12 19:29:30,285 INFO L226 Difference]: Without dead ends: 8037 [2021-08-12 19:29:30,286 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1549.9ms TimeCoverageRelationStatistics Valid=376, Invalid=1880, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 19:29:30,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8037 states. [2021-08-12 19:29:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8037 to 7267. [2021-08-12 19:29:31,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7267 states, 7266 states have (on average 4.376135425268373) internal successors, (31797), 7266 states have internal predecessors, (31797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:31,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7267 states to 7267 states and 31797 transitions. [2021-08-12 19:29:31,330 INFO L78 Accepts]: Start accepts. Automaton has 7267 states and 31797 transitions. Word has length 33 [2021-08-12 19:29:31,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 19:29:31,330 INFO L482 AbstractCegarLoop]: Abstraction has 7267 states and 31797 transitions. [2021-08-12 19:29:31,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 19:29:31,331 INFO L276 IsEmpty]: Start isEmpty. Operand 7267 states and 31797 transitions. [2021-08-12 19:29:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-12 19:29:31,343 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 19:29:31,343 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 19:29:31,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:31,543 INFO L430 AbstractCegarLoop]: === Iteration 168 === [thread4Thread1of1ForFork4Err0INUSE_VIOLATION, thread4Thread1of1ForFork4Err9INUSE_VIOLATION, thread1Err1INUSE_VIOLATION, thread1Err6INUSE_VIOLATION, thread1Thread1of1ForFork1Err2INUSE_VIOLATION, thread1Thread1of1ForFork1Err4INUSE_VIOLATION, thread4Err3INUSE_VIOLATION, thread4Err7INUSE_VIOLATION, ULTIMATE.startErr8INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-12 19:29:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 19:29:31,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1419048822, now seen corresponding path program 87 times [2021-08-12 19:29:31,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 19:29:31,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251606361] [2021-08-12 19:29:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 19:29:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 19:29:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:31,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 19:29:31,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251606361] [2021-08-12 19:29:31,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251606361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:31,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354783985] [2021-08-12 19:29:31,746 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:31,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 19:29:31,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 19:29:31,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-12 19:29:31,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 19:29:31,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-12 19:29:31,994 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-08-12 19:29:31,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-08-12 19:29:31,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-08-12 19:29:32,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-08-12 19:29:32,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-08-12 19:29:32,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:52 [2021-08-12 19:29:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 19:29:32,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354783985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 19:29:32,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 19:29:32,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-12 19:29:32,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592160056] [2021-08-12 19:29:32,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-08-12 19:29:32,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 19:29:32,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-12 19:29:32,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-08-12 19:29:32,191 INFO L87 Difference]: Start difference. First operand 7267 states and 31797 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-12 19:29:38,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-12 19:29:38,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 19:29:38,240 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 19:29:38,242 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 19:29:38,243 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 19:29:38,244 INFO L202 PluginConnector]: Adding new model parallel-sum-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 07:29:38 BasicIcfg [2021-08-12 19:29:38,244 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 19:29:38,244 INFO L168 Benchmark]: Toolchain (without parser) took 542133.35 ms. Allocated memory was 209.7 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 189.7 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 342.8 MB. Max. memory is 8.0 GB. [2021-08-12 19:29:38,244 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 209.7 MB. Free memory is still 191.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 19:29:38,244 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.41 ms. Allocated memory is still 209.7 MB. Free memory was 189.6 MB in the beginning and 188.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-12 19:29:38,244 INFO L168 Benchmark]: Boogie Preprocessor took 15.60 ms. Allocated memory is still 209.7 MB. Free memory was 188.2 MB in the beginning and 187.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 19:29:38,244 INFO L168 Benchmark]: RCFGBuilder took 347.62 ms. Allocated memory is still 209.7 MB. Free memory was 187.0 MB in the beginning and 170.5 MB in the end (delta: 16.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-08-12 19:29:38,245 INFO L168 Benchmark]: TraceAbstraction took 541735.39 ms. Allocated memory was 209.7 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 170.0 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 321.8 MB. Max. memory is 8.0 GB. [2021-08-12 19:29:38,245 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 0.15 ms. Allocated memory is still 209.7 MB. Free memory is still 191.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 24.41 ms. Allocated memory is still 209.7 MB. Free memory was 189.6 MB in the beginning and 188.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 15.60 ms. Allocated memory is still 209.7 MB. Free memory was 188.2 MB in the beginning and 187.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 347.62 ms. Allocated memory is still 209.7 MB. Free memory was 187.0 MB in the beginning and 170.5 MB in the end (delta: 16.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 541735.39 ms. Allocated memory was 209.7 MB in the beginning and 1.7 GB in the end (delta: 1.5 GB). Free memory was 170.0 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 321.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (7267states) and FLOYD_HOARE automaton (currently 42 states, 27 states before enhancement),while ReachableStatesComputation was computing reachable states (8348 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 76 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 541558.6ms, OverallIterations: 168, TraceHistogramMax: 2, EmptinessCheckTime: 976.7ms, AutomataDifference: 378037.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 91.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16928 SDtfs, 55307 SDslu, 183798 SDs, 0 SdLazy, 113167 SolverSat, 7543 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 43392.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8623 GetRequests, 3560 SyntacticMatches, 307 SemanticMatches, 4756 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36149 ImplicationChecksByTransitivity, 107413.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=7267occurred in iteration=166, InterpolantAutomatonStates: 3684, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 63828.0ms AutomataMinimizationTime, 167 MinimizatonAttempts, 104210 StatesRemovedByMinimization, 167 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1156.8ms SsaConstructionTime, 2580.5ms SatisfiabilityAnalysisTime, 56402.9ms InterpolantComputationTime, 10015 NumberOfCodeBlocks, 10015 NumberOfCodeBlocksAsserted, 506 NumberOfCheckSat, 9682 ConstructedInterpolants, 0 QuantifiedInterpolants, 153088 SizeOfPredicates, 1872 NumberOfNonLiveVariables, 21764 ConjunctsInSsa, 5049 ConjunctsInUnsatCore, 333 InterpolantComputations, 5 PerfectInterpolantSequences, 43/1229 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown