/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 03:58:46,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 03:58:46,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 03:58:46,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 03:58:46,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 03:58:46,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 03:58:46,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 03:58:46,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 03:58:46,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 03:58:46,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 03:58:46,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 03:58:46,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 03:58:46,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 03:58:46,326 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 03:58:46,326 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 03:58:46,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 03:58:46,332 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 03:58:46,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 03:58:46,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 03:58:46,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 03:58:46,339 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 [2021-06-05 03:58:46,366 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 03:58:46,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 03:58:46,367 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 03:58:46,367 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 03:58:46,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 03:58:46,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 03:58:46,369 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 03:58:46,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 03:58:46,369 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 03:58:46,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 03:58:46,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 03:58:46,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 03:58:46,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 03:58:46,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 03:58:46,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 03:58:46,370 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 03:58:46,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 03:58:46,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 03:58:46,371 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 03:58:46,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 03:58:46,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 03:58:46,371 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 03:58:46,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 03:58:46,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:58:46,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 03:58:46,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 03:58:46,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 03:58:46,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 03:58:46,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 03:58:46,372 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 03:58:46,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 03:58:46,372 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 03:58:46,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 03:58:46,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 03:58:46,648 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 03:58:46,649 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 03:58:46,650 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 03:58:46,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl [2021-06-05 03:58:46,665 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-flipped-dist.wvr.bpl' [2021-06-05 03:58:46,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 03:58:46,699 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 03:58:46,700 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 03:58:46,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 03:58:46,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 03:58:46,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:58:46" (1/1) ... [2021-06-05 03:58:46,713 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:58:46" (1/1) ... [2021-06-05 03:58:46,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 03:58:46,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 03:58:46,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 03:58:46,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 03:58:46,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:58:46" (1/1) ... [2021-06-05 03:58:46,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:58:46" (1/1) ... [2021-06-05 03:58:46,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:58:46" (1/1) ... [2021-06-05 03:58:46,726 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:58:46" (1/1) ... [2021-06-05 03:58:46,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:58:46" (1/1) ... [2021-06-05 03:58:46,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:58:46" (1/1) ... [2021-06-05 03:58:46,731 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:58:46" (1/1) ... [2021-06-05 03:58:46,731 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 03:58:46,732 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 03:58:46,732 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 03:58:46,732 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 03:58:46,734 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:58:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 03:58:46,793 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 03:58:46,793 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 03:58:46,793 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 03:58:46,794 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 03:58:46,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 03:58:46,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 03:58:46,794 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 03:58:46,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 03:58:46,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 03:58:46,794 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 03:58:46,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 03:58:46,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 03:58:46,795 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 03:58:46,934 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 03:58:46,934 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 03:58:46,935 INFO L202 PluginConnector]: Adding new model mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:58:46 BoogieIcfgContainer [2021-06-05 03:58:46,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 03:58:46,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 03:58:46,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 03:58:46,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 03:58:46,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:58:46" (1/2) ... [2021-06-05 03:58:46,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60297256 and model type mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:58:46, skipping insertion in model container [2021-06-05 03:58:46,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:58:46" (2/2) ... [2021-06-05 03:58:46,940 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.bpl [2021-06-05 03:58:46,944 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 03:58:46,945 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 03:58:46,945 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 03:58:46,946 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 03:58:46,972 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 03:58:46,986 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 03:58:47,017 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 03:58:47,017 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 03:58:47,017 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 03:58:47,017 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 03:58:47,017 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 03:58:47,017 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 03:58:47,017 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 03:58:47,017 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 03:58:47,039 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-06-05 03:58:47,054 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:47,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:47,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 03:58:47,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:47,062 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:47,062 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:47,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:47,065 INFO L82 PathProgramCache]: Analyzing trace with hash 49297092, now seen corresponding path program 1 times [2021-06-05 03:58:47,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:47,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443210745] [2021-06-05 03:58:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:47,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:47,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443210745] [2021-06-05 03:58:47,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443210745] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:58:47,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:58:47,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 03:58:47,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083618041] [2021-06-05 03:58:47,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 03:58:47,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:47,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 03:58:47,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:58:47,242 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 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 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:47,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:47,264 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-06-05 03:58:47,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 03:58:47,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 03:58:47,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:47,273 INFO L225 Difference]: With dead ends: 214 [2021-06-05 03:58:47,273 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 03:58:47,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 03:58:47,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 03:58:47,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-06-05 03:58:47,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-06-05 03:58:47,308 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-06-05 03:58:47,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:47,309 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-06-05 03:58:47,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-06-05 03:58:47,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:58:47,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:47,310 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:47,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 03:58:47,311 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:47,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:47,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1895819686, now seen corresponding path program 1 times [2021-06-05 03:58:47,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:47,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743781784] [2021-06-05 03:58:47,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:47,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:47,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743781784] [2021-06-05 03:58:47,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743781784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:47,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032076143] [2021-06-05 03:58:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:47,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:47,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 03:58:47,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:47,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032076143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:47,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:47,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 03:58:47,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032547442] [2021-06-05 03:58:47,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:58:47,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:47,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:58:47,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:58:47,452 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:47,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:47,530 INFO L93 Difference]: Finished difference Result 344 states and 959 transitions. [2021-06-05 03:58:47,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:58:47,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:58:47,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:47,536 INFO L225 Difference]: With dead ends: 344 [2021-06-05 03:58:47,537 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 03:58:47,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:58:47,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 03:58:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 172. [2021-06-05 03:58:47,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.953216374269006) internal successors, (505), 171 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:47,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 505 transitions. [2021-06-05 03:58:47,553 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 505 transitions. Word has length 17 [2021-06-05 03:58:47,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:47,553 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 505 transitions. [2021-06-05 03:58:47,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 505 transitions. [2021-06-05 03:58:47,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:58:47,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:47,555 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:47,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 03:58:47,769 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:47,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:47,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1698446180, now seen corresponding path program 1 times [2021-06-05 03:58:47,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:47,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594027808] [2021-06-05 03:58:47,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:47,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:47,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:47,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594027808] [2021-06-05 03:58:47,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594027808] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:58:47,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:58:47,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:58:47,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480324916] [2021-06-05 03:58:47,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:58:47,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:47,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:58:47,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:58:47,812 INFO L87 Difference]: Start difference. First operand 172 states and 505 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:47,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:47,846 INFO L93 Difference]: Finished difference Result 237 states and 639 transitions. [2021-06-05 03:58:47,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:58:47,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:58:47,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:47,853 INFO L225 Difference]: With dead ends: 237 [2021-06-05 03:58:47,853 INFO L226 Difference]: Without dead ends: 227 [2021-06-05 03:58:47,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:58:47,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-06-05 03:58:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 186. [2021-06-05 03:58:47,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.843243243243243) internal successors, (526), 185 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 526 transitions. [2021-06-05 03:58:47,933 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 526 transitions. Word has length 17 [2021-06-05 03:58:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:47,933 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 526 transitions. [2021-06-05 03:58:47,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 526 transitions. [2021-06-05 03:58:47,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:58:47,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:47,934 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:47,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 03:58:47,935 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:47,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:47,935 INFO L82 PathProgramCache]: Analyzing trace with hash 567041058, now seen corresponding path program 1 times [2021-06-05 03:58:47,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:47,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563316233] [2021-06-05 03:58:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:47,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:47,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563316233] [2021-06-05 03:58:47,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563316233] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:58:47,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:58:47,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:58:47,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628241422] [2021-06-05 03:58:47,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:58:47,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:47,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:58:47,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:58:47,996 INFO L87 Difference]: Start difference. First operand 186 states and 526 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:48,061 INFO L93 Difference]: Finished difference Result 241 states and 641 transitions. [2021-06-05 03:58:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:58:48,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:58:48,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:48,063 INFO L225 Difference]: With dead ends: 241 [2021-06-05 03:58:48,063 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 03:58:48,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:58:48,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 03:58:48,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 192. [2021-06-05 03:58:48,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.8272251308900525) internal successors, (540), 191 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 540 transitions. [2021-06-05 03:58:48,074 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 540 transitions. Word has length 17 [2021-06-05 03:58:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:48,074 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 540 transitions. [2021-06-05 03:58:48,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 540 transitions. [2021-06-05 03:58:48,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:58:48,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:48,079 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:48,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 03:58:48,079 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:48,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:48,080 INFO L82 PathProgramCache]: Analyzing trace with hash -189703520, now seen corresponding path program 2 times [2021-06-05 03:58:48,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:48,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930629730] [2021-06-05 03:58:48,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:48,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:48,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930629730] [2021-06-05 03:58:48,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930629730] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:58:48,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:58:48,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:58:48,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814028608] [2021-06-05 03:58:48,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:58:48,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:48,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:58:48,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:58:48,119 INFO L87 Difference]: Start difference. First operand 192 states and 540 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:48,137 INFO L93 Difference]: Finished difference Result 214 states and 609 transitions. [2021-06-05 03:58:48,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:58:48,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:58:48,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:48,139 INFO L225 Difference]: With dead ends: 214 [2021-06-05 03:58:48,139 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 03:58:48,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:58:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 03:58:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2021-06-05 03:58:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.882978723404255) internal successors, (542), 188 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 542 transitions. [2021-06-05 03:58:48,144 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 542 transitions. Word has length 17 [2021-06-05 03:58:48,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:48,144 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 542 transitions. [2021-06-05 03:58:48,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,144 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 542 transitions. [2021-06-05 03:58:48,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:58:48,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:48,145 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:48,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 03:58:48,145 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:48,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:48,145 INFO L82 PathProgramCache]: Analyzing trace with hash -142653028, now seen corresponding path program 3 times [2021-06-05 03:58:48,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:48,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531676711] [2021-06-05 03:58:48,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:48,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:48,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:48,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531676711] [2021-06-05 03:58:48,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531676711] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:58:48,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:58:48,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:58:48,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077336596] [2021-06-05 03:58:48,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:58:48,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:48,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:58:48,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:58:48,171 INFO L87 Difference]: Start difference. First operand 189 states and 542 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:48,198 INFO L93 Difference]: Finished difference Result 254 states and 707 transitions. [2021-06-05 03:58:48,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:58:48,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:58:48,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:48,199 INFO L225 Difference]: With dead ends: 254 [2021-06-05 03:58:48,199 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 03:58:48,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:58:48,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 03:58:48,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 209. [2021-06-05 03:58:48,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.894230769230769) internal successors, (602), 208 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 602 transitions. [2021-06-05 03:58:48,205 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 602 transitions. Word has length 17 [2021-06-05 03:58:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:48,205 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 602 transitions. [2021-06-05 03:58:48,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,205 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 602 transitions. [2021-06-05 03:58:48,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:58:48,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:48,205 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:48,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 03:58:48,206 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:48,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:48,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1302783074, now seen corresponding path program 2 times [2021-06-05 03:58:48,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:48,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85360173] [2021-06-05 03:58:48,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:48,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:48,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85360173] [2021-06-05 03:58:48,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85360173] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:58:48,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:58:48,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 03:58:48,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115043133] [2021-06-05 03:58:48,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 03:58:48,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:48,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 03:58:48,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:58:48,248 INFO L87 Difference]: Start difference. First operand 209 states and 602 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:48,268 INFO L93 Difference]: Finished difference Result 245 states and 714 transitions. [2021-06-05 03:58:48,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 03:58:48,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:58:48,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:48,270 INFO L225 Difference]: With dead ends: 245 [2021-06-05 03:58:48,270 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 03:58:48,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 03:58:48,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 03:58:48,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 214. [2021-06-05 03:58:48,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.9624413145539905) internal successors, (631), 213 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 631 transitions. [2021-06-05 03:58:48,275 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 631 transitions. Word has length 17 [2021-06-05 03:58:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:48,276 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 631 transitions. [2021-06-05 03:58:48,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,276 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 631 transitions. [2021-06-05 03:58:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 03:58:48,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:48,276 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:48,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 03:58:48,276 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:48,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:48,277 INFO L82 PathProgramCache]: Analyzing trace with hash -768893542, now seen corresponding path program 3 times [2021-06-05 03:58:48,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:48,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363827728] [2021-06-05 03:58:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:48,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:48,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363827728] [2021-06-05 03:58:48,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363827728] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 03:58:48,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 03:58:48,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 03:58:48,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100204685] [2021-06-05 03:58:48,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 03:58:48,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:48,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 03:58:48,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:58:48,323 INFO L87 Difference]: Start difference. First operand 214 states and 631 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:48,356 INFO L93 Difference]: Finished difference Result 237 states and 678 transitions. [2021-06-05 03:58:48,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 03:58:48,356 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 03:58:48,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:48,357 INFO L225 Difference]: With dead ends: 237 [2021-06-05 03:58:48,357 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 03:58:48,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 03:58:48,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 03:58:48,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 193. [2021-06-05 03:58:48,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.9583333333333335) internal successors, (568), 192 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 568 transitions. [2021-06-05 03:58:48,363 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 568 transitions. Word has length 17 [2021-06-05 03:58:48,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:48,363 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 568 transitions. [2021-06-05 03:58:48,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,363 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 568 transitions. [2021-06-05 03:58:48,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 03:58:48,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:48,363 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:48,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 03:58:48,364 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:48,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1586125762, now seen corresponding path program 1 times [2021-06-05 03:58:48,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:48,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093635913] [2021-06-05 03:58:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:48,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:48,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093635913] [2021-06-05 03:58:48,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093635913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:48,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332236303] [2021-06-05 03:58:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:48,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 03:58:48,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:48,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332236303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:48,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:48,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-06-05 03:58:48,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706929312] [2021-06-05 03:58:48,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:58:48,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:48,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:58:48,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:58:48,506 INFO L87 Difference]: Start difference. First operand 193 states and 568 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:48,557 INFO L93 Difference]: Finished difference Result 254 states and 739 transitions. [2021-06-05 03:58:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 03:58:48,560 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 03:58:48,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:48,562 INFO L225 Difference]: With dead ends: 254 [2021-06-05 03:58:48,562 INFO L226 Difference]: Without dead ends: 254 [2021-06-05 03:58:48,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:58:48,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-06-05 03:58:48,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 190. [2021-06-05 03:58:48,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.9100529100529102) internal successors, (550), 189 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 550 transitions. [2021-06-05 03:58:48,567 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 550 transitions. Word has length 19 [2021-06-05 03:58:48,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:48,567 INFO L482 AbstractCegarLoop]: Abstraction has 190 states and 550 transitions. [2021-06-05 03:58:48,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:48,567 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 550 transitions. [2021-06-05 03:58:48,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:58:48,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:48,568 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:48,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:48,784 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:48,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:48,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2080042904, now seen corresponding path program 1 times [2021-06-05 03:58:48,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:48,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747659065] [2021-06-05 03:58:48,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:48,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:48,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747659065] [2021-06-05 03:58:48,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747659065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:48,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822761876] [2021-06-05 03:58:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:48,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:58:48,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:49,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822761876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:49,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:49,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 03:58:49,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799367946] [2021-06-05 03:58:49,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:58:49,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:49,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:58:49,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:58:49,013 INFO L87 Difference]: Start difference. First operand 190 states and 550 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:49,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:49,124 INFO L93 Difference]: Finished difference Result 342 states and 999 transitions. [2021-06-05 03:58:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:58:49,124 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:58:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:49,126 INFO L225 Difference]: With dead ends: 342 [2021-06-05 03:58:49,126 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 03:58:49,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:58:49,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 03:58:49,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 245. [2021-06-05 03:58:49,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.9836065573770494) internal successors, (728), 244 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 728 transitions. [2021-06-05 03:58:49,132 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 728 transitions. Word has length 21 [2021-06-05 03:58:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:49,133 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 728 transitions. [2021-06-05 03:58:49,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:49,134 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 728 transitions. [2021-06-05 03:58:49,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:58:49,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:49,134 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:49,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 03:58:49,345 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:49,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:49,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1334485332, now seen corresponding path program 2 times [2021-06-05 03:58:49,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:49,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240471930] [2021-06-05 03:58:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:49,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:49,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240471930] [2021-06-05 03:58:49,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240471930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:49,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633470435] [2021-06-05 03:58:49,389 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:49,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:49,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:49,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:58:49,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:49,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633470435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:49,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:49,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 03:58:49,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023645558] [2021-06-05 03:58:49,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:58:49,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:49,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:58:49,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:58:49,519 INFO L87 Difference]: Start difference. First operand 245 states and 728 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:49,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:49,605 INFO L93 Difference]: Finished difference Result 394 states and 1167 transitions. [2021-06-05 03:58:49,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:58:49,606 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:58:49,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:49,607 INFO L225 Difference]: With dead ends: 394 [2021-06-05 03:58:49,607 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 03:58:49,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:58:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 03:58:49,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 280. [2021-06-05 03:58:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.978494623655914) internal successors, (831), 279 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 831 transitions. [2021-06-05 03:58:49,613 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 831 transitions. Word has length 21 [2021-06-05 03:58:49,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:49,614 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 831 transitions. [2021-06-05 03:58:49,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:49,614 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 831 transitions. [2021-06-05 03:58:49,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:58:49,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:49,614 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:49,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:49,829 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:49,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:49,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1241595234, now seen corresponding path program 3 times [2021-06-05 03:58:49,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:49,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226664847] [2021-06-05 03:58:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:49,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:49,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226664847] [2021-06-05 03:58:49,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226664847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:49,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953237619] [2021-06-05 03:58:49,885 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:49,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 03:58:49,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:49,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:58:49,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:50,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953237619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:50,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:50,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 03:58:50,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57802679] [2021-06-05 03:58:50,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:58:50,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:50,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:58:50,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:58:50,016 INFO L87 Difference]: Start difference. First operand 280 states and 831 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:50,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:50,078 INFO L93 Difference]: Finished difference Result 413 states and 1224 transitions. [2021-06-05 03:58:50,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:58:50,078 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:58:50,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:50,080 INFO L225 Difference]: With dead ends: 413 [2021-06-05 03:58:50,080 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 03:58:50,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:58:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 03:58:50,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 292. [2021-06-05 03:58:50,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.979381443298969) internal successors, (867), 291 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 867 transitions. [2021-06-05 03:58:50,087 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 867 transitions. Word has length 21 [2021-06-05 03:58:50,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:50,087 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 867 transitions. [2021-06-05 03:58:50,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:50,087 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 867 transitions. [2021-06-05 03:58:50,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:58:50,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:50,089 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:50,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 03:58:50,305 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:50,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:50,305 INFO L82 PathProgramCache]: Analyzing trace with hash 204187218, now seen corresponding path program 4 times [2021-06-05 03:58:50,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:50,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322730208] [2021-06-05 03:58:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:50,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:50,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322730208] [2021-06-05 03:58:50,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322730208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:50,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396289568] [2021-06-05 03:58:50,362 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:50,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:50,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:50,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:58:50,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:50,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396289568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:50,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:50,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 03:58:50,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605805347] [2021-06-05 03:58:50,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:58:50,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:50,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:58:50,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:58:50,461 INFO L87 Difference]: Start difference. First operand 292 states and 867 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:50,537 INFO L93 Difference]: Finished difference Result 421 states and 1248 transitions. [2021-06-05 03:58:50,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:58:50,538 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:58:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:50,539 INFO L225 Difference]: With dead ends: 421 [2021-06-05 03:58:50,539 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 03:58:50,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:58:50,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 03:58:50,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 316. [2021-06-05 03:58:50,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.980952380952381) internal successors, (939), 315 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:50,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 939 transitions. [2021-06-05 03:58:50,546 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 939 transitions. Word has length 21 [2021-06-05 03:58:50,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:50,546 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 939 transitions. [2021-06-05 03:58:50,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:50,546 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 939 transitions. [2021-06-05 03:58:50,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:58:50,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:50,547 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:50,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:50,767 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:50,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:50,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1380051106, now seen corresponding path program 5 times [2021-06-05 03:58:50,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:50,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899314551] [2021-06-05 03:58:50,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:50,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:50,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899314551] [2021-06-05 03:58:50,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899314551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:50,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362715263] [2021-06-05 03:58:50,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:58:50,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:50,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:50,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:58:50,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:50,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:50,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362715263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:50,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:50,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 03:58:50,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556762645] [2021-06-05 03:58:50,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:58:50,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:50,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:58:50,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:58:50,940 INFO L87 Difference]: Start difference. First operand 316 states and 939 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:51,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:51,028 INFO L93 Difference]: Finished difference Result 491 states and 1452 transitions. [2021-06-05 03:58:51,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:58:51,028 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 03:58:51,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:51,030 INFO L225 Difference]: With dead ends: 491 [2021-06-05 03:58:51,030 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 03:58:51,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:58:51,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 03:58:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 341. [2021-06-05 03:58:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.973529411764706) internal successors, (1011), 340 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:51,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1011 transitions. [2021-06-05 03:58:51,038 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1011 transitions. Word has length 21 [2021-06-05 03:58:51,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:51,038 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1011 transitions. [2021-06-05 03:58:51,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:51,038 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1011 transitions. [2021-06-05 03:58:51,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 03:58:51,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:51,039 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:51,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 03:58:51,258 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:51,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:51,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1758862818, now seen corresponding path program 6 times [2021-06-05 03:58:51,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:51,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026878062] [2021-06-05 03:58:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:51,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:51,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:51,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026878062] [2021-06-05 03:58:51,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026878062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:51,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490473976] [2021-06-05 03:58:51,296 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:58:51,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 03:58:51,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:51,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 03:58:51,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:51,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490473976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:51,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:51,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 03:58:51,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344845463] [2021-06-05 03:58:51,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:58:51,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:51,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:58:51,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:58:51,420 INFO L87 Difference]: Start difference. First operand 341 states and 1011 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:51,524 INFO L93 Difference]: Finished difference Result 473 states and 1400 transitions. [2021-06-05 03:58:51,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 03:58:51,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 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 21 [2021-06-05 03:58:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:51,526 INFO L225 Difference]: With dead ends: 473 [2021-06-05 03:58:51,526 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 03:58:51,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:58:51,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 03:58:51,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 341. [2021-06-05 03:58:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.973529411764706) internal successors, (1011), 340 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:51,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 1011 transitions. [2021-06-05 03:58:51,535 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 1011 transitions. Word has length 21 [2021-06-05 03:58:51,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:51,536 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 1011 transitions. [2021-06-05 03:58:51,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:51,536 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 1011 transitions. [2021-06-05 03:58:51,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:58:51,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:51,537 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:51,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 03:58:51,755 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:51,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:51,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1287155254, now seen corresponding path program 7 times [2021-06-05 03:58:51,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:51,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689248104] [2021-06-05 03:58:51,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:51,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:51,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689248104] [2021-06-05 03:58:51,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689248104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:51,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464203440] [2021-06-05 03:58:51,784 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:51,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:58:51,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:51,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464203440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:51,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:51,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 03:58:51,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715670501] [2021-06-05 03:58:51,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:58:51,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:51,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:58:51,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:58:51,885 INFO L87 Difference]: Start difference. First operand 341 states and 1011 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:52,016 INFO L93 Difference]: Finished difference Result 749 states and 2150 transitions. [2021-06-05 03:58:52,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:58:52,016 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 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 23 [2021-06-05 03:58:52,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:52,019 INFO L225 Difference]: With dead ends: 749 [2021-06-05 03:58:52,019 INFO L226 Difference]: Without dead ends: 749 [2021-06-05 03:58:52,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:58:52,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-05 03:58:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 430. [2021-06-05 03:58:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 3.1095571095571097) internal successors, (1334), 429 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:52,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 1334 transitions. [2021-06-05 03:58:52,031 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 1334 transitions. Word has length 23 [2021-06-05 03:58:52,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:52,031 INFO L482 AbstractCegarLoop]: Abstraction has 430 states and 1334 transitions. [2021-06-05 03:58:52,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:52,031 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 1334 transitions. [2021-06-05 03:58:52,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:58:52,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:52,032 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:52,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 03:58:52,245 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:52,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:52,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1821721226, now seen corresponding path program 8 times [2021-06-05 03:58:52,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:52,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587816540] [2021-06-05 03:58:52,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:52,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:52,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587816540] [2021-06-05 03:58:52,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587816540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:52,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112079015] [2021-06-05 03:58:52,270 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:52,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:52,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:52,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:58:52,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:52,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112079015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:52,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:52,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 03:58:52,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994702208] [2021-06-05 03:58:52,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:58:52,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:52,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:58:52,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:58:52,340 INFO L87 Difference]: Start difference. First operand 430 states and 1334 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:52,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:52,453 INFO L93 Difference]: Finished difference Result 758 states and 2270 transitions. [2021-06-05 03:58:52,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:58:52,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:58:52,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:52,456 INFO L225 Difference]: With dead ends: 758 [2021-06-05 03:58:52,456 INFO L226 Difference]: Without dead ends: 733 [2021-06-05 03:58:52,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:52,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-06-05 03:58:52,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 583. [2021-06-05 03:58:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.1597938144329896) internal successors, (1839), 582 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:52,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1839 transitions. [2021-06-05 03:58:52,468 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1839 transitions. Word has length 23 [2021-06-05 03:58:52,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:52,468 INFO L482 AbstractCegarLoop]: Abstraction has 583 states and 1839 transitions. [2021-06-05 03:58:52,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:52,468 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1839 transitions. [2021-06-05 03:58:52,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:58:52,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:52,469 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:52,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 03:58:52,681 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:52,681 INFO L82 PathProgramCache]: Analyzing trace with hash -63390266, now seen corresponding path program 9 times [2021-06-05 03:58:52,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:52,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723433795] [2021-06-05 03:58:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:52,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:52,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:52,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723433795] [2021-06-05 03:58:52,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723433795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:52,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555045290] [2021-06-05 03:58:52,699 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:52,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:58:52,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:52,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:58:52,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:52,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555045290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:52,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:52,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 03:58:52,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623102091] [2021-06-05 03:58:52,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:58:52,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:52,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:58:52,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:58:52,757 INFO L87 Difference]: Start difference. First operand 583 states and 1839 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:52,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:52,823 INFO L93 Difference]: Finished difference Result 1311 states and 4123 transitions. [2021-06-05 03:58:52,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:58:52,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:58:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:52,828 INFO L225 Difference]: With dead ends: 1311 [2021-06-05 03:58:52,828 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 03:58:52,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:58:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 03:58:52,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 821. [2021-06-05 03:58:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 3.34390243902439) internal successors, (2742), 820 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:52,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2742 transitions. [2021-06-05 03:58:52,846 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2742 transitions. Word has length 23 [2021-06-05 03:58:52,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:52,846 INFO L482 AbstractCegarLoop]: Abstraction has 821 states and 2742 transitions. [2021-06-05 03:58:52,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:52,846 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2742 transitions. [2021-06-05 03:58:52,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:58:52,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:52,848 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:53,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 03:58:53,063 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:53,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:53,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1548958394, now seen corresponding path program 10 times [2021-06-05 03:58:53,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:53,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58870692] [2021-06-05 03:58:53,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:53,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:53,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58870692] [2021-06-05 03:58:53,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58870692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:53,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143191141] [2021-06-05 03:58:53,090 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:53,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:53,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:53,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:58:53,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:53,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:53,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143191141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:53,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:53,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-05 03:58:53,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037372908] [2021-06-05 03:58:53,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:58:53,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:53,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:58:53,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:58:53,164 INFO L87 Difference]: Start difference. First operand 821 states and 2742 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:53,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:53,240 INFO L93 Difference]: Finished difference Result 1047 states and 3326 transitions. [2021-06-05 03:58:53,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:58:53,241 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:58:53,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:53,245 INFO L225 Difference]: With dead ends: 1047 [2021-06-05 03:58:53,245 INFO L226 Difference]: Without dead ends: 1047 [2021-06-05 03:58:53,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:58:53,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-06-05 03:58:53,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 829. [2021-06-05 03:58:53,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 3.321256038647343) internal successors, (2750), 828 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2750 transitions. [2021-06-05 03:58:53,262 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2750 transitions. Word has length 23 [2021-06-05 03:58:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:53,262 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 2750 transitions. [2021-06-05 03:58:53,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2750 transitions. [2021-06-05 03:58:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:58:53,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:53,265 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:53,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:53,484 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:53,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:53,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1102347518, now seen corresponding path program 11 times [2021-06-05 03:58:53,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:53,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22773742] [2021-06-05 03:58:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:53,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:53,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22773742] [2021-06-05 03:58:53,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22773742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:53,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851967852] [2021-06-05 03:58:53,505 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:53,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:58:53,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:53,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:58:53,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:53,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851967852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:53,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:53,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-05 03:58:53,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965218174] [2021-06-05 03:58:53,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:58:53,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:53,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:58:53,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:58:53,572 INFO L87 Difference]: Start difference. First operand 829 states and 2750 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:53,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:53,677 INFO L93 Difference]: Finished difference Result 1062 states and 3341 transitions. [2021-06-05 03:58:53,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:58:53,678 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:58:53,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:53,682 INFO L225 Difference]: With dead ends: 1062 [2021-06-05 03:58:53,682 INFO L226 Difference]: Without dead ends: 1056 [2021-06-05 03:58:53,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:58:53,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-05 03:58:53,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 852. [2021-06-05 03:58:53,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.2925969447708576) internal successors, (2802), 851 states have internal predecessors, (2802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:53,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2802 transitions. [2021-06-05 03:58:53,701 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2802 transitions. Word has length 23 [2021-06-05 03:58:53,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:53,701 INFO L482 AbstractCegarLoop]: Abstraction has 852 states and 2802 transitions. [2021-06-05 03:58:53,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:53,701 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2802 transitions. [2021-06-05 03:58:53,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:58:53,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:53,703 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:53,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-06-05 03:58:53,917 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:53,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:53,917 INFO L82 PathProgramCache]: Analyzing trace with hash 50200326, now seen corresponding path program 12 times [2021-06-05 03:58:53,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:53,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080910396] [2021-06-05 03:58:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:53,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:53,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080910396] [2021-06-05 03:58:53,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080910396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:53,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143111941] [2021-06-05 03:58:53,937 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:53,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:58:53,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:53,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:58:53,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:54,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:54,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143111941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:54,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:54,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 03:58:54,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125385829] [2021-06-05 03:58:54,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:58:54,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:54,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:58:54,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:58:54,007 INFO L87 Difference]: Start difference. First operand 852 states and 2802 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:54,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:54,340 INFO L93 Difference]: Finished difference Result 2185 states and 6702 transitions. [2021-06-05 03:58:54,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 03:58:54,341 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:58:54,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:54,347 INFO L225 Difference]: With dead ends: 2185 [2021-06-05 03:58:54,348 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 03:58:54,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 03:58:54,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 03:58:54,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 941. [2021-06-05 03:58:54,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.331914893617021) internal successors, (3132), 940 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:54,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 3132 transitions. [2021-06-05 03:58:54,372 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 3132 transitions. Word has length 23 [2021-06-05 03:58:54,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:54,372 INFO L482 AbstractCegarLoop]: Abstraction has 941 states and 3132 transitions. [2021-06-05 03:58:54,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:54,373 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 3132 transitions. [2021-06-05 03:58:54,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:58:54,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:54,374 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:54,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:54,582 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:54,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:54,583 INFO L82 PathProgramCache]: Analyzing trace with hash -32096124, now seen corresponding path program 13 times [2021-06-05 03:58:54,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:54,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288197429] [2021-06-05 03:58:54,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:54,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:54,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288197429] [2021-06-05 03:58:54,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288197429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:54,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770534549] [2021-06-05 03:58:54,604 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:54,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:58:54,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:54,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770534549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:54,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:54,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-06-05 03:58:54,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737295034] [2021-06-05 03:58:54,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:58:54,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:54,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:58:54,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:58:54,681 INFO L87 Difference]: Start difference. First operand 941 states and 3132 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:54,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:54,754 INFO L93 Difference]: Finished difference Result 1660 states and 5311 transitions. [2021-06-05 03:58:54,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:58:54,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:58:54,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:54,760 INFO L225 Difference]: With dead ends: 1660 [2021-06-05 03:58:54,760 INFO L226 Difference]: Without dead ends: 1660 [2021-06-05 03:58:54,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:58:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2021-06-05 03:58:54,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1146. [2021-06-05 03:58:54,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 3.4) internal successors, (3893), 1145 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:54,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 3893 transitions. [2021-06-05 03:58:54,784 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 3893 transitions. Word has length 23 [2021-06-05 03:58:54,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:54,785 INFO L482 AbstractCegarLoop]: Abstraction has 1146 states and 3893 transitions. [2021-06-05 03:58:54,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:54,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 3893 transitions. [2021-06-05 03:58:54,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:58:54,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:54,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:55,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 03:58:55,001 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:55,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:55,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1539696380, now seen corresponding path program 14 times [2021-06-05 03:58:55,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:55,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744696475] [2021-06-05 03:58:55,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:55,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:55,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744696475] [2021-06-05 03:58:55,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744696475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:55,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006814759] [2021-06-05 03:58:55,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:55,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:55,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:55,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:58:55,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:55,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:55,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006814759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:55,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:55,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 03:58:55,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041705731] [2021-06-05 03:58:55,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:58:55,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:55,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:58:55,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:58:55,129 INFO L87 Difference]: Start difference. First operand 1146 states and 3893 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:55,484 INFO L93 Difference]: Finished difference Result 2541 states and 8351 transitions. [2021-06-05 03:58:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:58:55,485 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:58:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:55,493 INFO L225 Difference]: With dead ends: 2541 [2021-06-05 03:58:55,493 INFO L226 Difference]: Without dead ends: 2369 [2021-06-05 03:58:55,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2021-06-05 03:58:55,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2369 states. [2021-06-05 03:58:55,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2369 to 1684. [2021-06-05 03:58:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 3.474747474747475) internal successors, (5848), 1683 states have internal predecessors, (5848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:55,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 5848 transitions. [2021-06-05 03:58:55,525 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 5848 transitions. Word has length 23 [2021-06-05 03:58:55,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:55,525 INFO L482 AbstractCegarLoop]: Abstraction has 1684 states and 5848 transitions. [2021-06-05 03:58:55,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:55,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 5848 transitions. [2021-06-05 03:58:55,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:58:55,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:55,528 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:55,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:55,744 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:55,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:55,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2142929212, now seen corresponding path program 15 times [2021-06-05 03:58:55,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:55,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692396806] [2021-06-05 03:58:55,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:55,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:55,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692396806] [2021-06-05 03:58:55,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692396806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:55,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363079996] [2021-06-05 03:58:55,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:55,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:58:55,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:55,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:58:55,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:55,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363079996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:55,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:55,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 03:58:55,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763925052] [2021-06-05 03:58:55,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 03:58:55,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:55,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 03:58:55,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 03:58:55,852 INFO L87 Difference]: Start difference. First operand 1684 states and 5848 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:56,157 INFO L93 Difference]: Finished difference Result 4179 states and 14030 transitions. [2021-06-05 03:58:56,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 03:58:56,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:58:56,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:56,169 INFO L225 Difference]: With dead ends: 4179 [2021-06-05 03:58:56,169 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 03:58:56,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2021-06-05 03:58:56,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 03:58:56,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 2798. [2021-06-05 03:58:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2797 states have (on average 3.5723989989274223) internal successors, (9992), 2797 states have internal predecessors, (9992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 9992 transitions. [2021-06-05 03:58:56,227 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 9992 transitions. Word has length 23 [2021-06-05 03:58:56,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:56,228 INFO L482 AbstractCegarLoop]: Abstraction has 2798 states and 9992 transitions. [2021-06-05 03:58:56,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:56,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 9992 transitions. [2021-06-05 03:58:56,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:58:56,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:56,233 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:56,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 03:58:56,450 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:56,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:56,450 INFO L82 PathProgramCache]: Analyzing trace with hash 2023712944, now seen corresponding path program 16 times [2021-06-05 03:58:56,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:56,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486684633] [2021-06-05 03:58:56,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:56,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:56,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:56,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486684633] [2021-06-05 03:58:56,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486684633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:56,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575638616] [2021-06-05 03:58:56,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:56,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:58:56,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:56,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:58:56,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:56,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575638616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:56,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:56,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-06-05 03:58:56,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943281180] [2021-06-05 03:58:56,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:58:56,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:56,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:58:56,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:58:56,562 INFO L87 Difference]: Start difference. First operand 2798 states and 9992 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:56,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:56,662 INFO L93 Difference]: Finished difference Result 3396 states and 11614 transitions. [2021-06-05 03:58:56,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:58:56,662 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:58:56,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:56,669 INFO L225 Difference]: With dead ends: 3396 [2021-06-05 03:58:56,669 INFO L226 Difference]: Without dead ends: 3345 [2021-06-05 03:58:56,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 03:58:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3345 states. [2021-06-05 03:58:56,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3345 to 2812. [2021-06-05 03:58:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 2811 states have (on average 3.55923159018143) internal successors, (10005), 2811 states have internal predecessors, (10005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 10005 transitions. [2021-06-05 03:58:56,719 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 10005 transitions. Word has length 23 [2021-06-05 03:58:56,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:56,720 INFO L482 AbstractCegarLoop]: Abstraction has 2812 states and 10005 transitions. [2021-06-05 03:58:56,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:56,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 10005 transitions. [2021-06-05 03:58:56,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:58:56,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:56,725 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:56,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 03:58:56,937 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:56,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:56,937 INFO L82 PathProgramCache]: Analyzing trace with hash 783282608, now seen corresponding path program 17 times [2021-06-05 03:58:56,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:56,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961929812] [2021-06-05 03:58:56,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:56,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:56,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961929812] [2021-06-05 03:58:56,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961929812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:56,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905064890] [2021-06-05 03:58:56,954 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:56,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:56,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:56,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:58:56,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:58:57,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905064890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:57,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:57,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 03:58:57,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640210509] [2021-06-05 03:58:57,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 03:58:57,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:57,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 03:58:57,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 03:58:57,034 INFO L87 Difference]: Start difference. First operand 2812 states and 10005 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:57,103 INFO L93 Difference]: Finished difference Result 4023 states and 13889 transitions. [2021-06-05 03:58:57,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 03:58:57,104 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:58:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:57,111 INFO L225 Difference]: With dead ends: 4023 [2021-06-05 03:58:57,111 INFO L226 Difference]: Without dead ends: 4005 [2021-06-05 03:58:57,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.9ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 03:58:57,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2021-06-05 03:58:57,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 3260. [2021-06-05 03:58:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 3.59159251304081) internal successors, (11705), 3259 states have internal predecessors, (11705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:57,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 11705 transitions. [2021-06-05 03:58:57,167 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 11705 transitions. Word has length 23 [2021-06-05 03:58:57,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:57,167 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 11705 transitions. [2021-06-05 03:58:57,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:57,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 11705 transitions. [2021-06-05 03:58:57,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:58:57,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:57,173 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:57,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 03:58:57,390 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:57,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:57,390 INFO L82 PathProgramCache]: Analyzing trace with hash 530496180, now seen corresponding path program 18 times [2021-06-05 03:58:57,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:57,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533619585] [2021-06-05 03:58:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:57,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:57,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533619585] [2021-06-05 03:58:57,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533619585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:57,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719852229] [2021-06-05 03:58:57,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:57,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:58:57,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:57,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:58:57,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:57,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719852229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:57,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:57,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 03:58:57,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966410097] [2021-06-05 03:58:57,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:58:57,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:57,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:58:57,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:58:57,509 INFO L87 Difference]: Start difference. First operand 3260 states and 11705 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:57,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:57,871 INFO L93 Difference]: Finished difference Result 8888 states and 30108 transitions. [2021-06-05 03:58:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 03:58:57,871 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:58:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:57,889 INFO L225 Difference]: With dead ends: 8888 [2021-06-05 03:58:57,890 INFO L226 Difference]: Without dead ends: 8754 [2021-06-05 03:58:57,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=276, Invalid=914, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 03:58:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8754 states. [2021-06-05 03:58:57,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8754 to 5409. [2021-06-05 03:58:57,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5409 states, 5408 states have (on average 3.689164201183432) internal successors, (19951), 5408 states have internal predecessors, (19951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5409 states to 5409 states and 19951 transitions. [2021-06-05 03:58:58,005 INFO L78 Accepts]: Start accepts. Automaton has 5409 states and 19951 transitions. Word has length 23 [2021-06-05 03:58:58,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:58,005 INFO L482 AbstractCegarLoop]: Abstraction has 5409 states and 19951 transitions. [2021-06-05 03:58:58,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5409 states and 19951 transitions. [2021-06-05 03:58:58,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:58:58,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:58,044 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:58,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 03:58:58,259 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:58,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:58,260 INFO L82 PathProgramCache]: Analyzing trace with hash 254898436, now seen corresponding path program 19 times [2021-06-05 03:58:58,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:58,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18310838] [2021-06-05 03:58:58,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:58,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:58,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18310838] [2021-06-05 03:58:58,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18310838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:58,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531562285] [2021-06-05 03:58:58,279 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:58,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:58:58,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:58,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:58,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531562285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:58,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:58,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 03:58:58,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26138651] [2021-06-05 03:58:58,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 03:58:58,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:58,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 03:58:58,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 03:58:58,343 INFO L87 Difference]: Start difference. First operand 5409 states and 19951 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:58,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:58,432 INFO L93 Difference]: Finished difference Result 6626 states and 23548 transitions. [2021-06-05 03:58:58,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 03:58:58,432 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:58:58,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:58,443 INFO L225 Difference]: With dead ends: 6626 [2021-06-05 03:58:58,443 INFO L226 Difference]: Without dead ends: 6576 [2021-06-05 03:58:58,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 03:58:58,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2021-06-05 03:58:58,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 5617. [2021-06-05 03:58:58,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5617 states, 5616 states have (on average 3.6428062678062676) internal successors, (20458), 5616 states have internal predecessors, (20458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:58,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5617 states to 5617 states and 20458 transitions. [2021-06-05 03:58:58,531 INFO L78 Accepts]: Start accepts. Automaton has 5617 states and 20458 transitions. Word has length 23 [2021-06-05 03:58:58,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:58,531 INFO L482 AbstractCegarLoop]: Abstraction has 5617 states and 20458 transitions. [2021-06-05 03:58:58,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:58,532 INFO L276 IsEmpty]: Start isEmpty. Operand 5617 states and 20458 transitions. [2021-06-05 03:58:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:58:58,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:58,540 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:58,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 03:58:58,741 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:58,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:58,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1159769024, now seen corresponding path program 20 times [2021-06-05 03:58:58,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:58,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796287162] [2021-06-05 03:58:58,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:58,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:58,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796287162] [2021-06-05 03:58:58,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796287162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:58,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457617378] [2021-06-05 03:58:58,762 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:58,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:58:58,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:58,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:58:58,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:58,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457617378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:58,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:58,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 03:58:58,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201981839] [2021-06-05 03:58:58,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:58:58,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:58,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:58:58,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:58:58,824 INFO L87 Difference]: Start difference. First operand 5617 states and 20458 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:59,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:58:59,189 INFO L93 Difference]: Finished difference Result 12332 states and 42412 transitions. [2021-06-05 03:58:59,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 03:58:59,190 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 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 23 [2021-06-05 03:58:59,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:58:59,210 INFO L225 Difference]: With dead ends: 12332 [2021-06-05 03:58:59,210 INFO L226 Difference]: Without dead ends: 12185 [2021-06-05 03:58:59,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 03:58:59,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12185 states. [2021-06-05 03:58:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12185 to 8357. [2021-06-05 03:58:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8357 states, 8356 states have (on average 3.7277405457156534) internal successors, (31149), 8356 states have internal predecessors, (31149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:59,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 31149 transitions. [2021-06-05 03:58:59,400 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 31149 transitions. Word has length 23 [2021-06-05 03:58:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:58:59,400 INFO L482 AbstractCegarLoop]: Abstraction has 8357 states and 31149 transitions. [2021-06-05 03:58:59,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:58:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 31149 transitions. [2021-06-05 03:58:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 03:58:59,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:58:59,415 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:58:59,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:59,629 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:58:59,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:58:59,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1991076932, now seen corresponding path program 21 times [2021-06-05 03:58:59,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:58:59,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45178089] [2021-06-05 03:58:59,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:58:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:58:59,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:58:59,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:58:59,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45178089] [2021-06-05 03:58:59,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45178089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:59,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476881911] [2021-06-05 03:58:59,645 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:58:59,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 03:58:59,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:58:59,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 03:58:59,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:58:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:58:59,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476881911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:58:59,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:58:59,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 03:58:59,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161852647] [2021-06-05 03:58:59,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 03:58:59,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:58:59,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 03:58:59,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 03:58:59,728 INFO L87 Difference]: Start difference. First operand 8357 states and 31149 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:00,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:00,026 INFO L93 Difference]: Finished difference Result 11103 states and 39610 transitions. [2021-06-05 03:59:00,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 03:59:00,026 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 03:59:00,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:00,046 INFO L225 Difference]: With dead ends: 11103 [2021-06-05 03:59:00,046 INFO L226 Difference]: Without dead ends: 10950 [2021-06-05 03:59:00,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2021-06-05 03:59:00,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-06-05 03:59:00,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 8492. [2021-06-05 03:59:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8492 states, 8491 states have (on average 3.725120716052291) internal successors, (31630), 8491 states have internal predecessors, (31630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:00,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8492 states to 8492 states and 31630 transitions. [2021-06-05 03:59:00,280 INFO L78 Accepts]: Start accepts. Automaton has 8492 states and 31630 transitions. Word has length 23 [2021-06-05 03:59:00,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:00,280 INFO L482 AbstractCegarLoop]: Abstraction has 8492 states and 31630 transitions. [2021-06-05 03:59:00,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:00,280 INFO L276 IsEmpty]: Start isEmpty. Operand 8492 states and 31630 transitions. [2021-06-05 03:59:00,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:00,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:00,296 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:00,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:00,512 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:00,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:00,512 INFO L82 PathProgramCache]: Analyzing trace with hash -553390134, now seen corresponding path program 22 times [2021-06-05 03:59:00,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:00,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9599019] [2021-06-05 03:59:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:00,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:00,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9599019] [2021-06-05 03:59:00,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9599019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:00,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494592169] [2021-06-05 03:59:00,607 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:00,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:00,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:00,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:00,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:00,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494592169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:00,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:00,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:00,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765053576] [2021-06-05 03:59:00,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:00,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:00,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:00,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:00,807 INFO L87 Difference]: Start difference. First operand 8492 states and 31630 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:01,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:01,109 INFO L93 Difference]: Finished difference Result 8694 states and 32230 transitions. [2021-06-05 03:59:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:59:01,110 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 27 [2021-06-05 03:59:01,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:01,125 INFO L225 Difference]: With dead ends: 8694 [2021-06-05 03:59:01,126 INFO L226 Difference]: Without dead ends: 8679 [2021-06-05 03:59:01,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:59:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8679 states. [2021-06-05 03:59:01,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8679 to 8558. [2021-06-05 03:59:01,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8558 states, 8557 states have (on average 3.722098866425149) internal successors, (31850), 8557 states have internal predecessors, (31850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8558 states to 8558 states and 31850 transitions. [2021-06-05 03:59:01,301 INFO L78 Accepts]: Start accepts. Automaton has 8558 states and 31850 transitions. Word has length 27 [2021-06-05 03:59:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:01,301 INFO L482 AbstractCegarLoop]: Abstraction has 8558 states and 31850 transitions. [2021-06-05 03:59:01,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 8558 states and 31850 transitions. [2021-06-05 03:59:01,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:01,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:01,315 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:01,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:01,517 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:01,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:01,517 INFO L82 PathProgramCache]: Analyzing trace with hash -546769482, now seen corresponding path program 23 times [2021-06-05 03:59:01,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:01,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335776828] [2021-06-05 03:59:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:01,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:01,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335776828] [2021-06-05 03:59:01,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335776828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:01,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425787679] [2021-06-05 03:59:01,639 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:01,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:59:01,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:01,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:01,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:01,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425787679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:01,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:01,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:01,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730876515] [2021-06-05 03:59:01,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:01,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:01,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:01,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:01,832 INFO L87 Difference]: Start difference. First operand 8558 states and 31850 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:02,091 INFO L93 Difference]: Finished difference Result 8977 states and 33000 transitions. [2021-06-05 03:59:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:02,091 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 27 [2021-06-05 03:59:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:02,110 INFO L225 Difference]: With dead ends: 8977 [2021-06-05 03:59:02,110 INFO L226 Difference]: Without dead ends: 8896 [2021-06-05 03:59:02,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:59:02,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2021-06-05 03:59:02,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 8629. [2021-06-05 03:59:02,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8629 states, 8628 states have (on average 3.7192860454334724) internal successors, (32090), 8628 states have internal predecessors, (32090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:02,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8629 states to 8629 states and 32090 transitions. [2021-06-05 03:59:02,275 INFO L78 Accepts]: Start accepts. Automaton has 8629 states and 32090 transitions. Word has length 27 [2021-06-05 03:59:02,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:02,275 INFO L482 AbstractCegarLoop]: Abstraction has 8629 states and 32090 transitions. [2021-06-05 03:59:02,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:02,275 INFO L276 IsEmpty]: Start isEmpty. Operand 8629 states and 32090 transitions. [2021-06-05 03:59:02,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:02,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:02,292 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:02,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 03:59:02,492 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:02,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:02,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1765844602, now seen corresponding path program 24 times [2021-06-05 03:59:02,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:02,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946789917] [2021-06-05 03:59:02,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:02,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:02,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946789917] [2021-06-05 03:59:02,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946789917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:02,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026092264] [2021-06-05 03:59:02,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:02,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:59:02,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:02,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:02,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:02,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026092264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:02,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:02,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:02,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603738648] [2021-06-05 03:59:02,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:02,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:02,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:02,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:02,743 INFO L87 Difference]: Start difference. First operand 8629 states and 32090 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:03,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:03,037 INFO L93 Difference]: Finished difference Result 9107 states and 33442 transitions. [2021-06-05 03:59:03,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:03,038 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 27 [2021-06-05 03:59:03,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:03,054 INFO L225 Difference]: With dead ends: 9107 [2021-06-05 03:59:03,054 INFO L226 Difference]: Without dead ends: 9029 [2021-06-05 03:59:03,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:59:03,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9029 states. [2021-06-05 03:59:03,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9029 to 8705. [2021-06-05 03:59:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8705 states, 8704 states have (on average 3.7188648897058822) internal successors, (32369), 8704 states have internal predecessors, (32369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:03,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8705 states to 8705 states and 32369 transitions. [2021-06-05 03:59:03,221 INFO L78 Accepts]: Start accepts. Automaton has 8705 states and 32369 transitions. Word has length 27 [2021-06-05 03:59:03,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:03,221 INFO L482 AbstractCegarLoop]: Abstraction has 8705 states and 32369 transitions. [2021-06-05 03:59:03,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:03,221 INFO L276 IsEmpty]: Start isEmpty. Operand 8705 states and 32369 transitions. [2021-06-05 03:59:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:03,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:03,235 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:03,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:03,435 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:03,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1801149938, now seen corresponding path program 25 times [2021-06-05 03:59:03,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:03,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124635926] [2021-06-05 03:59:03,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:03,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:03,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124635926] [2021-06-05 03:59:03,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124635926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:03,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273270505] [2021-06-05 03:59:03,524 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:03,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:03,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:03,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273270505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:03,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:03,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:03,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281133850] [2021-06-05 03:59:03,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:03,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:03,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:03,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:03,690 INFO L87 Difference]: Start difference. First operand 8705 states and 32369 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:03,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:03,996 INFO L93 Difference]: Finished difference Result 9134 states and 33615 transitions. [2021-06-05 03:59:03,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:03,996 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 27 [2021-06-05 03:59:03,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:04,011 INFO L225 Difference]: With dead ends: 9134 [2021-06-05 03:59:04,011 INFO L226 Difference]: Without dead ends: 9104 [2021-06-05 03:59:04,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9104 states. [2021-06-05 03:59:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9104 to 8799. [2021-06-05 03:59:04,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8799 states, 8798 states have (on average 3.7176631052511935) internal successors, (32708), 8798 states have internal predecessors, (32708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:04,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8799 states to 8799 states and 32708 transitions. [2021-06-05 03:59:04,138 INFO L78 Accepts]: Start accepts. Automaton has 8799 states and 32708 transitions. Word has length 27 [2021-06-05 03:59:04,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:04,138 INFO L482 AbstractCegarLoop]: Abstraction has 8799 states and 32708 transitions. [2021-06-05 03:59:04,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:04,138 INFO L276 IsEmpty]: Start isEmpty. Operand 8799 states and 32708 transitions. [2021-06-05 03:59:04,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:04,150 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:04,150 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:04,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 03:59:04,354 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:04,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:04,354 INFO L82 PathProgramCache]: Analyzing trace with hash -181203274, now seen corresponding path program 26 times [2021-06-05 03:59:04,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:04,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230482674] [2021-06-05 03:59:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:04,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:04,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230482674] [2021-06-05 03:59:04,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230482674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:04,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476355923] [2021-06-05 03:59:04,443 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:04,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:04,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:04,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:04,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:04,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476355923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:04,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:04,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:04,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138571033] [2021-06-05 03:59:04,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:04,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:04,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:04,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:04,622 INFO L87 Difference]: Start difference. First operand 8799 states and 32708 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:04,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:04,868 INFO L93 Difference]: Finished difference Result 9600 states and 35001 transitions. [2021-06-05 03:59:04,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:59:04,869 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 27 [2021-06-05 03:59:04,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:04,888 INFO L225 Difference]: With dead ends: 9600 [2021-06-05 03:59:04,889 INFO L226 Difference]: Without dead ends: 9541 [2021-06-05 03:59:04,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:04,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2021-06-05 03:59:05,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 8909. [2021-06-05 03:59:05,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8909 states, 8908 states have (on average 3.7182308037718905) internal successors, (33122), 8908 states have internal predecessors, (33122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:05,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8909 states to 8909 states and 33122 transitions. [2021-06-05 03:59:05,106 INFO L78 Accepts]: Start accepts. Automaton has 8909 states and 33122 transitions. Word has length 27 [2021-06-05 03:59:05,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:05,106 INFO L482 AbstractCegarLoop]: Abstraction has 8909 states and 33122 transitions. [2021-06-05 03:59:05,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:05,106 INFO L276 IsEmpty]: Start isEmpty. Operand 8909 states and 33122 transitions. [2021-06-05 03:59:05,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:05,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:05,120 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:05,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:05,333 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:05,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:05,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1438887350, now seen corresponding path program 27 times [2021-06-05 03:59:05,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:05,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845036471] [2021-06-05 03:59:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:05,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:05,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:05,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845036471] [2021-06-05 03:59:05,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845036471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:05,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30666381] [2021-06-05 03:59:05,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:05,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:59:05,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:05,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:05,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:05,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30666381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:05,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:05,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:05,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243192287] [2021-06-05 03:59:05,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:05,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:05,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:05,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:05,582 INFO L87 Difference]: Start difference. First operand 8909 states and 33122 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:05,815 INFO L93 Difference]: Finished difference Result 9517 states and 34885 transitions. [2021-06-05 03:59:05,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:59:05,815 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 27 [2021-06-05 03:59:05,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:05,832 INFO L225 Difference]: With dead ends: 9517 [2021-06-05 03:59:05,832 INFO L226 Difference]: Without dead ends: 9477 [2021-06-05 03:59:05,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:05,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-06-05 03:59:05,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 9103. [2021-06-05 03:59:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9103 states, 9102 states have (on average 3.707426939134256) internal successors, (33745), 9102 states have internal predecessors, (33745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:05,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9103 states to 9103 states and 33745 transitions. [2021-06-05 03:59:05,972 INFO L78 Accepts]: Start accepts. Automaton has 9103 states and 33745 transitions. Word has length 27 [2021-06-05 03:59:05,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:05,972 INFO L482 AbstractCegarLoop]: Abstraction has 9103 states and 33745 transitions. [2021-06-05 03:59:05,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:05,972 INFO L276 IsEmpty]: Start isEmpty. Operand 9103 states and 33745 transitions. [2021-06-05 03:59:05,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:05,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:05,986 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:06,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 03:59:06,187 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:06,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:06,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1060302908, now seen corresponding path program 28 times [2021-06-05 03:59:06,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:06,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129415407] [2021-06-05 03:59:06,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:06,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:06,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129415407] [2021-06-05 03:59:06,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129415407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:06,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295621565] [2021-06-05 03:59:06,257 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:06,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:06,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:06,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:06,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:06,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295621565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:06,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:06,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:06,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918001501] [2021-06-05 03:59:06,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:06,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:06,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:06,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:06,494 INFO L87 Difference]: Start difference. First operand 9103 states and 33745 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:06,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:06,780 INFO L93 Difference]: Finished difference Result 9247 states and 34135 transitions. [2021-06-05 03:59:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:59:06,780 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 27 [2021-06-05 03:59:06,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:06,797 INFO L225 Difference]: With dead ends: 9247 [2021-06-05 03:59:06,797 INFO L226 Difference]: Without dead ends: 9219 [2021-06-05 03:59:06,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:59:06,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2021-06-05 03:59:06,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 9136. [2021-06-05 03:59:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9136 states, 9135 states have (on average 3.7056376573617955) internal successors, (33851), 9135 states have internal predecessors, (33851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9136 states to 9136 states and 33851 transitions. [2021-06-05 03:59:06,930 INFO L78 Accepts]: Start accepts. Automaton has 9136 states and 33851 transitions. Word has length 27 [2021-06-05 03:59:06,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:06,930 INFO L482 AbstractCegarLoop]: Abstraction has 9136 states and 33851 transitions. [2021-06-05 03:59:06,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:06,930 INFO L276 IsEmpty]: Start isEmpty. Operand 9136 states and 33851 transitions. [2021-06-05 03:59:06,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:06,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:06,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:07,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:07,145 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:07,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:07,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1053682256, now seen corresponding path program 29 times [2021-06-05 03:59:07,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:07,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628571202] [2021-06-05 03:59:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:07,213 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:07,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:07,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628571202] [2021-06-05 03:59:07,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628571202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:07,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720878403] [2021-06-05 03:59:07,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:07,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:59:07,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:07,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:07,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:07,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720878403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:07,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:07,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:07,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68306765] [2021-06-05 03:59:07,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:07,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:07,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:07,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:07,384 INFO L87 Difference]: Start difference. First operand 9136 states and 33851 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:07,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:07,622 INFO L93 Difference]: Finished difference Result 9354 states and 34405 transitions. [2021-06-05 03:59:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:07,622 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 27 [2021-06-05 03:59:07,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:07,640 INFO L225 Difference]: With dead ends: 9354 [2021-06-05 03:59:07,640 INFO L226 Difference]: Without dead ends: 9280 [2021-06-05 03:59:07,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:59:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9280 states. [2021-06-05 03:59:07,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9280 to 9194. [2021-06-05 03:59:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9194 states, 9193 states have (on average 3.7022734689437615) internal successors, (34035), 9193 states have internal predecessors, (34035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:07,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9194 states to 9194 states and 34035 transitions. [2021-06-05 03:59:07,847 INFO L78 Accepts]: Start accepts. Automaton has 9194 states and 34035 transitions. Word has length 27 [2021-06-05 03:59:07,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:07,847 INFO L482 AbstractCegarLoop]: Abstraction has 9194 states and 34035 transitions. [2021-06-05 03:59:07,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:07,847 INFO L276 IsEmpty]: Start isEmpty. Operand 9194 states and 34035 transitions. [2021-06-05 03:59:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:07,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:07,862 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:08,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 03:59:08,067 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:08,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:08,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1258931828, now seen corresponding path program 30 times [2021-06-05 03:59:08,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:08,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788451073] [2021-06-05 03:59:08,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:08,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:08,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788451073] [2021-06-05 03:59:08,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788451073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:08,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632925222] [2021-06-05 03:59:08,129 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:08,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:59:08,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:08,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:08,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:08,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:08,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632925222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:08,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:08,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:08,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673181616] [2021-06-05 03:59:08,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:08,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:08,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:08,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:08,304 INFO L87 Difference]: Start difference. First operand 9194 states and 34035 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:08,523 INFO L93 Difference]: Finished difference Result 9533 states and 34982 transitions. [2021-06-05 03:59:08,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:08,523 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 27 [2021-06-05 03:59:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:08,541 INFO L225 Difference]: With dead ends: 9533 [2021-06-05 03:59:08,541 INFO L226 Difference]: Without dead ends: 9420 [2021-06-05 03:59:08,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:59:08,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9420 states. [2021-06-05 03:59:08,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9420 to 9274. [2021-06-05 03:59:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9274 states, 9273 states have (on average 3.6988029763830474) internal successors, (34299), 9273 states have internal predecessors, (34299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 34299 transitions. [2021-06-05 03:59:08,696 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 34299 transitions. Word has length 27 [2021-06-05 03:59:08,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:08,696 INFO L482 AbstractCegarLoop]: Abstraction has 9274 states and 34299 transitions. [2021-06-05 03:59:08,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:08,696 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 34299 transitions. [2021-06-05 03:59:08,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:08,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:08,711 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:08,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 03:59:08,927 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:08,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:08,927 INFO L82 PathProgramCache]: Analyzing trace with hash -17021312, now seen corresponding path program 31 times [2021-06-05 03:59:08,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:08,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492253152] [2021-06-05 03:59:08,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:08,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:08,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492253152] [2021-06-05 03:59:08,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492253152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:08,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062989261] [2021-06-05 03:59:08,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:09,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:09,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:09,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062989261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:09,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:09,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:09,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506072629] [2021-06-05 03:59:09,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:09,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:09,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:09,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:09,158 INFO L87 Difference]: Start difference. First operand 9274 states and 34299 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:09,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:09,434 INFO L93 Difference]: Finished difference Result 9439 states and 34788 transitions. [2021-06-05 03:59:09,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:59:09,435 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 27 [2021-06-05 03:59:09,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:09,451 INFO L225 Difference]: With dead ends: 9439 [2021-06-05 03:59:09,451 INFO L226 Difference]: Without dead ends: 9424 [2021-06-05 03:59:09,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 03:59:09,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9424 states. [2021-06-05 03:59:09,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9424 to 9304. [2021-06-05 03:59:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9304 states, 9303 states have (on average 3.6990218209179835) internal successors, (34412), 9303 states have internal predecessors, (34412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:09,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9304 states to 9304 states and 34412 transitions. [2021-06-05 03:59:09,574 INFO L78 Accepts]: Start accepts. Automaton has 9304 states and 34412 transitions. Word has length 27 [2021-06-05 03:59:09,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:09,574 INFO L482 AbstractCegarLoop]: Abstraction has 9304 states and 34412 transitions. [2021-06-05 03:59:09,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:09,574 INFO L276 IsEmpty]: Start isEmpty. Operand 9304 states and 34412 transitions. [2021-06-05 03:59:09,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:09,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:09,587 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:09,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 03:59:09,789 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:09,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:09,789 INFO L82 PathProgramCache]: Analyzing trace with hash -533712016, now seen corresponding path program 32 times [2021-06-05 03:59:09,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:09,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976985666] [2021-06-05 03:59:09,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:09,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:09,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976985666] [2021-06-05 03:59:09,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976985666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:09,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289173925] [2021-06-05 03:59:09,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:09,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:09,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:09,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:09,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:10,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289173925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:10,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:10,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:10,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158118948] [2021-06-05 03:59:10,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:10,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:10,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:10,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:10,130 INFO L87 Difference]: Start difference. First operand 9304 states and 34412 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:10,423 INFO L93 Difference]: Finished difference Result 9649 states and 35346 transitions. [2021-06-05 03:59:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:10,423 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 27 [2021-06-05 03:59:10,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:10,442 INFO L225 Difference]: With dead ends: 9649 [2021-06-05 03:59:10,442 INFO L226 Difference]: Without dead ends: 9561 [2021-06-05 03:59:10,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:59:10,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9561 states. [2021-06-05 03:59:10,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9561 to 9395. [2021-06-05 03:59:10,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9395 states, 9394 states have (on average 3.6943793911007026) internal successors, (34705), 9394 states have internal predecessors, (34705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9395 states to 9395 states and 34705 transitions. [2021-06-05 03:59:10,588 INFO L78 Accepts]: Start accepts. Automaton has 9395 states and 34705 transitions. Word has length 27 [2021-06-05 03:59:10,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:10,588 INFO L482 AbstractCegarLoop]: Abstraction has 9395 states and 34705 transitions. [2021-06-05 03:59:10,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:10,588 INFO L276 IsEmpty]: Start isEmpty. Operand 9395 states and 34705 transitions. [2021-06-05 03:59:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:10,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:10,603 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:10,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 03:59:10,804 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:10,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:10,804 INFO L82 PathProgramCache]: Analyzing trace with hash -339028684, now seen corresponding path program 33 times [2021-06-05 03:59:10,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:10,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070814369] [2021-06-05 03:59:10,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:10,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:10,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070814369] [2021-06-05 03:59:10,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070814369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:10,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271638862] [2021-06-05 03:59:10,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:10,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 03:59:10,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:10,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:10,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:11,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:11,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271638862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:11,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:11,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:11,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075149681] [2021-06-05 03:59:11,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:11,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:11,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:11,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:11,043 INFO L87 Difference]: Start difference. First operand 9395 states and 34705 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:11,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:11,303 INFO L93 Difference]: Finished difference Result 9931 states and 36232 transitions. [2021-06-05 03:59:11,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:11,303 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 27 [2021-06-05 03:59:11,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:11,320 INFO L225 Difference]: With dead ends: 9931 [2021-06-05 03:59:11,320 INFO L226 Difference]: Without dead ends: 9855 [2021-06-05 03:59:11,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:59:11,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9855 states. [2021-06-05 03:59:11,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9855 to 9522. [2021-06-05 03:59:11,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9522 states, 9521 states have (on average 3.6922592164688584) internal successors, (35154), 9521 states have internal predecessors, (35154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:11,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9522 states to 9522 states and 35154 transitions. [2021-06-05 03:59:11,453 INFO L78 Accepts]: Start accepts. Automaton has 9522 states and 35154 transitions. Word has length 27 [2021-06-05 03:59:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:11,453 INFO L482 AbstractCegarLoop]: Abstraction has 9522 states and 35154 transitions. [2021-06-05 03:59:11,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 9522 states and 35154 transitions. [2021-06-05 03:59:11,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:11,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:11,467 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:11,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:11,667 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:11,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:11,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1349589500, now seen corresponding path program 34 times [2021-06-05 03:59:11,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:11,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592230548] [2021-06-05 03:59:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:11,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:11,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592230548] [2021-06-05 03:59:11,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592230548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:11,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915985760] [2021-06-05 03:59:11,721 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:11,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:11,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:11,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:11,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:11,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915985760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:11,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:11,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:11,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688690445] [2021-06-05 03:59:11,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:11,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:11,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:11,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:11,865 INFO L87 Difference]: Start difference. First operand 9522 states and 35154 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:12,070 INFO L93 Difference]: Finished difference Result 9863 states and 36097 transitions. [2021-06-05 03:59:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:12,071 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:12,134 INFO L225 Difference]: With dead ends: 9863 [2021-06-05 03:59:12,134 INFO L226 Difference]: Without dead ends: 9764 [2021-06-05 03:59:12,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9764 states. [2021-06-05 03:59:12,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9764 to 9594. [2021-06-05 03:59:12,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9594 states, 9593 states have (on average 3.6910247055144376) internal successors, (35408), 9593 states have internal predecessors, (35408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:12,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9594 states to 9594 states and 35408 transitions. [2021-06-05 03:59:12,269 INFO L78 Accepts]: Start accepts. Automaton has 9594 states and 35408 transitions. Word has length 27 [2021-06-05 03:59:12,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:12,269 INFO L482 AbstractCegarLoop]: Abstraction has 9594 states and 35408 transitions. [2021-06-05 03:59:12,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:12,269 INFO L276 IsEmpty]: Start isEmpty. Operand 9594 states and 35408 transitions. [2021-06-05 03:59:12,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:12,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:12,283 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:12,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 03:59:12,484 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:12,484 INFO L82 PathProgramCache]: Analyzing trace with hash 193536128, now seen corresponding path program 35 times [2021-06-05 03:59:12,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:12,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124371767] [2021-06-05 03:59:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:12,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:12,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124371767] [2021-06-05 03:59:12,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124371767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:12,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216860304] [2021-06-05 03:59:12,537 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:12,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:59:12,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:12,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:12,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:12,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216860304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:12,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:12,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:12,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272207597] [2021-06-05 03:59:12,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:12,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:12,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:12,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:12,726 INFO L87 Difference]: Start difference. First operand 9594 states and 35408 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:12,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:12,953 INFO L93 Difference]: Finished difference Result 10085 states and 36794 transitions. [2021-06-05 03:59:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:12,953 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:12,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:12,973 INFO L225 Difference]: With dead ends: 10085 [2021-06-05 03:59:12,973 INFO L226 Difference]: Without dead ends: 10009 [2021-06-05 03:59:12,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:12,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10009 states. [2021-06-05 03:59:13,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10009 to 9667. [2021-06-05 03:59:13,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9667 states, 9666 states have (on average 3.6887026691495963) internal successors, (35655), 9666 states have internal predecessors, (35655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9667 states to 9667 states and 35655 transitions. [2021-06-05 03:59:13,127 INFO L78 Accepts]: Start accepts. Automaton has 9667 states and 35655 transitions. Word has length 27 [2021-06-05 03:59:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:13,128 INFO L482 AbstractCegarLoop]: Abstraction has 9667 states and 35655 transitions. [2021-06-05 03:59:13,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:13,128 INFO L276 IsEmpty]: Start isEmpty. Operand 9667 states and 35655 transitions. [2021-06-05 03:59:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:13,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:13,143 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:13,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 03:59:13,359 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:13,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:13,359 INFO L82 PathProgramCache]: Analyzing trace with hash -143606020, now seen corresponding path program 36 times [2021-06-05 03:59:13,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:13,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493229816] [2021-06-05 03:59:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:13,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:13,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:13,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493229816] [2021-06-05 03:59:13,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493229816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:13,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485057612] [2021-06-05 03:59:13,425 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:13,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:59:13,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:13,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:13,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:13,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485057612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:13,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:13,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:13,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761057496] [2021-06-05 03:59:13,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:13,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:13,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:13,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:13,596 INFO L87 Difference]: Start difference. First operand 9667 states and 35655 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:13,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:13,776 INFO L93 Difference]: Finished difference Result 10306 states and 37504 transitions. [2021-06-05 03:59:13,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:59:13,776 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 27 [2021-06-05 03:59:13,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:13,794 INFO L225 Difference]: With dead ends: 10306 [2021-06-05 03:59:13,794 INFO L226 Difference]: Without dead ends: 10170 [2021-06-05 03:59:13,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10170 states. [2021-06-05 03:59:13,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10170 to 9815. [2021-06-05 03:59:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9815 states, 9814 states have (on average 3.68830242510699) internal successors, (36197), 9814 states have internal predecessors, (36197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9815 states to 9815 states and 36197 transitions. [2021-06-05 03:59:13,925 INFO L78 Accepts]: Start accepts. Automaton has 9815 states and 36197 transitions. Word has length 27 [2021-06-05 03:59:13,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:13,925 INFO L482 AbstractCegarLoop]: Abstraction has 9815 states and 36197 transitions. [2021-06-05 03:59:13,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:13,925 INFO L276 IsEmpty]: Start isEmpty. Operand 9815 states and 36197 transitions. [2021-06-05 03:59:13,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:13,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:13,938 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:14,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:14,141 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:14,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:14,142 INFO L82 PathProgramCache]: Analyzing trace with hash -2109020860, now seen corresponding path program 37 times [2021-06-05 03:59:14,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:14,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619785081] [2021-06-05 03:59:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:14,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:14,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619785081] [2021-06-05 03:59:14,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619785081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:14,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985116004] [2021-06-05 03:59:14,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:14,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:14,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:14,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:14,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985116004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:14,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:14,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:14,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438750510] [2021-06-05 03:59:14,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:14,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:14,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:14,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:14,426 INFO L87 Difference]: Start difference. First operand 9815 states and 36197 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:14,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:14,645 INFO L93 Difference]: Finished difference Result 10112 states and 36984 transitions. [2021-06-05 03:59:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:14,645 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:14,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:14,662 INFO L225 Difference]: With dead ends: 10112 [2021-06-05 03:59:14,662 INFO L226 Difference]: Without dead ends: 10046 [2021-06-05 03:59:14,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:14,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10046 states. [2021-06-05 03:59:14,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10046 to 9840. [2021-06-05 03:59:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9840 states, 9839 states have (on average 3.6888911474743367) internal successors, (36295), 9839 states have internal predecessors, (36295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9840 states to 9840 states and 36295 transitions. [2021-06-05 03:59:14,794 INFO L78 Accepts]: Start accepts. Automaton has 9840 states and 36295 transitions. Word has length 27 [2021-06-05 03:59:14,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:14,794 INFO L482 AbstractCegarLoop]: Abstraction has 9840 states and 36295 transitions. [2021-06-05 03:59:14,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:14,795 INFO L276 IsEmpty]: Start isEmpty. Operand 9840 states and 36295 transitions. [2021-06-05 03:59:14,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:14,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:14,808 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:15,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 03:59:15,009 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:15,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:15,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1641622004, now seen corresponding path program 38 times [2021-06-05 03:59:15,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:15,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389459628] [2021-06-05 03:59:15,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:15,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:15,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:15,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389459628] [2021-06-05 03:59:15,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389459628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:15,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277814767] [2021-06-05 03:59:15,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:15,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:15,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:15,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:15,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:15,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:15,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277814767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:15,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:15,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:15,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81612898] [2021-06-05 03:59:15,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:15,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:15,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:15,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:15,208 INFO L87 Difference]: Start difference. First operand 9840 states and 36295 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:15,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:15,392 INFO L93 Difference]: Finished difference Result 10217 states and 37368 transitions. [2021-06-05 03:59:15,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:15,393 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:15,410 INFO L225 Difference]: With dead ends: 10217 [2021-06-05 03:59:15,410 INFO L226 Difference]: Without dead ends: 10187 [2021-06-05 03:59:15,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10187 states. [2021-06-05 03:59:15,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10187 to 9872. [2021-06-05 03:59:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9872 states, 9871 states have (on average 3.690102319927059) internal successors, (36425), 9871 states have internal predecessors, (36425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9872 states to 9872 states and 36425 transitions. [2021-06-05 03:59:15,550 INFO L78 Accepts]: Start accepts. Automaton has 9872 states and 36425 transitions. Word has length 27 [2021-06-05 03:59:15,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:15,550 INFO L482 AbstractCegarLoop]: Abstraction has 9872 states and 36425 transitions. [2021-06-05 03:59:15,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:15,550 INFO L276 IsEmpty]: Start isEmpty. Operand 9872 states and 36425 transitions. [2021-06-05 03:59:15,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:15,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:15,564 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:15,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:15,773 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:15,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:15,773 INFO L82 PathProgramCache]: Analyzing trace with hash -776405308, now seen corresponding path program 39 times [2021-06-05 03:59:15,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:15,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047021614] [2021-06-05 03:59:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:15,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:15,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:15,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047021614] [2021-06-05 03:59:15,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047021614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:15,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725267422] [2021-06-05 03:59:15,841 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:59:15,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:59:15,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:15,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:15,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:16,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725267422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:16,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:16,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:16,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869032030] [2021-06-05 03:59:16,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:16,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:16,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:16,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:16,018 INFO L87 Difference]: Start difference. First operand 9872 states and 36425 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:16,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:16,301 INFO L93 Difference]: Finished difference Result 10876 states and 39384 transitions. [2021-06-05 03:59:16,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:59:16,301 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:16,322 INFO L225 Difference]: With dead ends: 10876 [2021-06-05 03:59:16,324 INFO L226 Difference]: Without dead ends: 10826 [2021-06-05 03:59:16,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:16,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10826 states. [2021-06-05 03:59:16,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10826 to 10058. [2021-06-05 03:59:16,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10058 states, 10057 states have (on average 3.69424281594909) internal successors, (37153), 10057 states have internal predecessors, (37153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10058 states to 10058 states and 37153 transitions. [2021-06-05 03:59:16,514 INFO L78 Accepts]: Start accepts. Automaton has 10058 states and 37153 transitions. Word has length 27 [2021-06-05 03:59:16,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:16,514 INFO L482 AbstractCegarLoop]: Abstraction has 10058 states and 37153 transitions. [2021-06-05 03:59:16,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:16,514 INFO L276 IsEmpty]: Start isEmpty. Operand 10058 states and 37153 transitions. [2021-06-05 03:59:16,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:16,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:16,529 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:16,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 03:59:16,734 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:16,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:16,734 INFO L82 PathProgramCache]: Analyzing trace with hash 288417660, now seen corresponding path program 40 times [2021-06-05 03:59:16,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:16,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788207875] [2021-06-05 03:59:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:16,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:16,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:16,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788207875] [2021-06-05 03:59:16,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788207875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:16,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075753169] [2021-06-05 03:59:16,791 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:16,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:16,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:16,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:16,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:16,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075753169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:16,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:16,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:16,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423173133] [2021-06-05 03:59:16,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:16,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:16,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:16,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:16,963 INFO L87 Difference]: Start difference. First operand 10058 states and 37153 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:17,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:17,191 INFO L93 Difference]: Finished difference Result 10555 states and 38575 transitions. [2021-06-05 03:59:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:59:17,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:17,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:17,214 INFO L225 Difference]: With dead ends: 10555 [2021-06-05 03:59:17,214 INFO L226 Difference]: Without dead ends: 10525 [2021-06-05 03:59:17,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:17,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10525 states. [2021-06-05 03:59:17,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10525 to 10155. [2021-06-05 03:59:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10155 states, 10154 states have (on average 3.6938152452235573) internal successors, (37507), 10154 states have internal predecessors, (37507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:17,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10155 states to 10155 states and 37507 transitions. [2021-06-05 03:59:17,399 INFO L78 Accepts]: Start accepts. Automaton has 10155 states and 37507 transitions. Word has length 27 [2021-06-05 03:59:17,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:17,400 INFO L482 AbstractCegarLoop]: Abstraction has 10155 states and 37507 transitions. [2021-06-05 03:59:17,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:17,400 INFO L276 IsEmpty]: Start isEmpty. Operand 10155 states and 37507 transitions. [2021-06-05 03:59:17,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:17,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:17,415 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:17,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 03:59:17,615 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:17,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:17,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1717656832, now seen corresponding path program 41 times [2021-06-05 03:59:17,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:17,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240063415] [2021-06-05 03:59:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:17,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:17,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240063415] [2021-06-05 03:59:17,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240063415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:17,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803091587] [2021-06-05 03:59:17,676 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 03:59:17,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:59:17,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:17,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:17,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:17,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:17,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803091587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:17,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:17,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:17,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375750799] [2021-06-05 03:59:17,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:17,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:17,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:17,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:17,846 INFO L87 Difference]: Start difference. First operand 10155 states and 37507 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:18,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:18,057 INFO L93 Difference]: Finished difference Result 10625 states and 38849 transitions. [2021-06-05 03:59:18,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:59:18,058 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:18,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:18,079 INFO L225 Difference]: With dead ends: 10625 [2021-06-05 03:59:18,079 INFO L226 Difference]: Without dead ends: 10529 [2021-06-05 03:59:18,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:18,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10529 states. [2021-06-05 03:59:18,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10529 to 10297. [2021-06-05 03:59:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10297 states, 10296 states have (on average 3.6916278166278165) internal successors, (38009), 10296 states have internal predecessors, (38009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:18,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10297 states to 10297 states and 38009 transitions. [2021-06-05 03:59:18,252 INFO L78 Accepts]: Start accepts. Automaton has 10297 states and 38009 transitions. Word has length 27 [2021-06-05 03:59:18,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:18,252 INFO L482 AbstractCegarLoop]: Abstraction has 10297 states and 38009 transitions. [2021-06-05 03:59:18,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:18,253 INFO L276 IsEmpty]: Start isEmpty. Operand 10297 states and 38009 transitions. [2021-06-05 03:59:18,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:18,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:18,267 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:18,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 03:59:18,468 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:18,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:18,468 INFO L82 PathProgramCache]: Analyzing trace with hash 795869124, now seen corresponding path program 42 times [2021-06-05 03:59:18,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:18,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237253975] [2021-06-05 03:59:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:18,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:18,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237253975] [2021-06-05 03:59:18,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237253975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:18,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178167527] [2021-06-05 03:59:18,525 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:18,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:59:18,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:18,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:18,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:18,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178167527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:18,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:18,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:18,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836682527] [2021-06-05 03:59:18,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:18,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:18,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:18,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:18,716 INFO L87 Difference]: Start difference. First operand 10297 states and 38009 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:18,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:18,970 INFO L93 Difference]: Finished difference Result 11674 states and 42186 transitions. [2021-06-05 03:59:18,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:59:18,971 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 27 [2021-06-05 03:59:18,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:18,995 INFO L225 Difference]: With dead ends: 11674 [2021-06-05 03:59:18,996 INFO L226 Difference]: Without dead ends: 11640 [2021-06-05 03:59:18,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:19,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11640 states. [2021-06-05 03:59:19,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11640 to 10557. [2021-06-05 03:59:19,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10557 states, 10556 states have (on average 3.6996968548692686) internal successors, (39054), 10556 states have internal predecessors, (39054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:19,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10557 states to 10557 states and 39054 transitions. [2021-06-05 03:59:19,169 INFO L78 Accepts]: Start accepts. Automaton has 10557 states and 39054 transitions. Word has length 27 [2021-06-05 03:59:19,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:19,169 INFO L482 AbstractCegarLoop]: Abstraction has 10557 states and 39054 transitions. [2021-06-05 03:59:19,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:19,170 INFO L276 IsEmpty]: Start isEmpty. Operand 10557 states and 39054 transitions. [2021-06-05 03:59:19,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:19,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:19,184 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:19,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-05 03:59:19,385 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:19,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:19,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1324830332, now seen corresponding path program 43 times [2021-06-05 03:59:19,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:19,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677526876] [2021-06-05 03:59:19,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:19,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:19,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677526876] [2021-06-05 03:59:19,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677526876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:19,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941895850] [2021-06-05 03:59:19,462 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:19,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:19,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:19,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941895850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:19,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:19,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:19,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095181553] [2021-06-05 03:59:19,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:19,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:19,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:19,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:19,617 INFO L87 Difference]: Start difference. First operand 10557 states and 39054 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:19,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:19,848 INFO L93 Difference]: Finished difference Result 10738 states and 39591 transitions. [2021-06-05 03:59:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:59:19,849 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 27 [2021-06-05 03:59:19,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:19,868 INFO L225 Difference]: With dead ends: 10738 [2021-06-05 03:59:19,868 INFO L226 Difference]: Without dead ends: 10723 [2021-06-05 03:59:19,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:19,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10723 states. [2021-06-05 03:59:19,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10723 to 10592. [2021-06-05 03:59:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10592 states, 10591 states have (on average 3.6990841280332356) internal successors, (39177), 10591 states have internal predecessors, (39177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:20,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10592 states to 10592 states and 39177 transitions. [2021-06-05 03:59:20,003 INFO L78 Accepts]: Start accepts. Automaton has 10592 states and 39177 transitions. Word has length 27 [2021-06-05 03:59:20,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:20,003 INFO L482 AbstractCegarLoop]: Abstraction has 10592 states and 39177 transitions. [2021-06-05 03:59:20,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:20,004 INFO L276 IsEmpty]: Start isEmpty. Operand 10592 states and 39177 transitions. [2021-06-05 03:59:20,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:20,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:20,017 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:20,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:20,218 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:20,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:20,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1318209680, now seen corresponding path program 44 times [2021-06-05 03:59:20,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:20,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947454362] [2021-06-05 03:59:20,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:20,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:20,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947454362] [2021-06-05 03:59:20,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947454362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:20,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792367035] [2021-06-05 03:59:20,278 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:20,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:20,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:20,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:20,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:20,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792367035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:20,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:20,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:20,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274100431] [2021-06-05 03:59:20,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:20,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:20,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:20,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:20,440 INFO L87 Difference]: Start difference. First operand 10592 states and 39177 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:20,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:20,664 INFO L93 Difference]: Finished difference Result 11042 states and 40414 transitions. [2021-06-05 03:59:20,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:20,664 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 27 [2021-06-05 03:59:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:20,682 INFO L225 Difference]: With dead ends: 11042 [2021-06-05 03:59:20,683 INFO L226 Difference]: Without dead ends: 10965 [2021-06-05 03:59:20,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:20,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10965 states. [2021-06-05 03:59:20,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10965 to 10686. [2021-06-05 03:59:20,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10686 states, 10685 states have (on average 3.6966775854000935) internal successors, (39499), 10685 states have internal predecessors, (39499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10686 states to 10686 states and 39499 transitions. [2021-06-05 03:59:20,839 INFO L78 Accepts]: Start accepts. Automaton has 10686 states and 39499 transitions. Word has length 27 [2021-06-05 03:59:20,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:20,839 INFO L482 AbstractCegarLoop]: Abstraction has 10686 states and 39499 transitions. [2021-06-05 03:59:20,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 10686 states and 39499 transitions. [2021-06-05 03:59:20,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:20,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:20,854 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:21,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 03:59:21,055 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:21,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:21,055 INFO L82 PathProgramCache]: Analyzing trace with hash 994404404, now seen corresponding path program 45 times [2021-06-05 03:59:21,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:21,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807008815] [2021-06-05 03:59:21,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:21,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:21,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807008815] [2021-06-05 03:59:21,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807008815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:21,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538880148] [2021-06-05 03:59:21,117 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:21,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:59:21,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:21,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:21,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:21,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538880148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:21,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:21,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:21,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332244741] [2021-06-05 03:59:21,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:21,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:21,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:21,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:21,260 INFO L87 Difference]: Start difference. First operand 10686 states and 39499 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:21,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:21,488 INFO L93 Difference]: Finished difference Result 11185 states and 40920 transitions. [2021-06-05 03:59:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:21,488 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 27 [2021-06-05 03:59:21,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:21,509 INFO L225 Difference]: With dead ends: 11185 [2021-06-05 03:59:21,509 INFO L226 Difference]: Without dead ends: 11145 [2021-06-05 03:59:21,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:21,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11145 states. [2021-06-05 03:59:21,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11145 to 10743. [2021-06-05 03:59:21,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10743 states, 10742 states have (on average 3.6983801899087694) internal successors, (39728), 10742 states have internal predecessors, (39728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:21,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10743 states to 10743 states and 39728 transitions. [2021-06-05 03:59:21,673 INFO L78 Accepts]: Start accepts. Automaton has 10743 states and 39728 transitions. Word has length 27 [2021-06-05 03:59:21,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:21,674 INFO L482 AbstractCegarLoop]: Abstraction has 10743 states and 39728 transitions. [2021-06-05 03:59:21,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:21,674 INFO L276 IsEmpty]: Start isEmpty. Operand 10743 states and 39728 transitions. [2021-06-05 03:59:21,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:21,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:21,688 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:21,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:21,889 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:21,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:21,889 INFO L82 PathProgramCache]: Analyzing trace with hash -281548736, now seen corresponding path program 46 times [2021-06-05 03:59:21,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:21,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543387501] [2021-06-05 03:59:21,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:21,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:21,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543387501] [2021-06-05 03:59:21,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543387501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:21,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405693624] [2021-06-05 03:59:21,948 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:21,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:21,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:21,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:21,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:22,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405693624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:22,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:22,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:22,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753198944] [2021-06-05 03:59:22,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:22,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:22,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:22,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:22,111 INFO L87 Difference]: Start difference. First operand 10743 states and 39728 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:22,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:22,381 INFO L93 Difference]: Finished difference Result 10899 states and 40153 transitions. [2021-06-05 03:59:22,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:59:22,381 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 27 [2021-06-05 03:59:22,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:22,405 INFO L225 Difference]: With dead ends: 10899 [2021-06-05 03:59:22,406 INFO L226 Difference]: Without dead ends: 10871 [2021-06-05 03:59:22,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:22,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10871 states. [2021-06-05 03:59:22,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10871 to 10760. [2021-06-05 03:59:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10760 states, 10759 states have (on average 3.698299098429222) internal successors, (39790), 10759 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:22,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10760 states to 10760 states and 39790 transitions. [2021-06-05 03:59:22,628 INFO L78 Accepts]: Start accepts. Automaton has 10760 states and 39790 transitions. Word has length 27 [2021-06-05 03:59:22,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:22,628 INFO L482 AbstractCegarLoop]: Abstraction has 10760 states and 39790 transitions. [2021-06-05 03:59:22,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:22,628 INFO L276 IsEmpty]: Start isEmpty. Operand 10760 states and 39790 transitions. [2021-06-05 03:59:22,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:22,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:22,643 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:22,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 03:59:22,844 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash -798239440, now seen corresponding path program 47 times [2021-06-05 03:59:22,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:22,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256786403] [2021-06-05 03:59:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:22,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:22,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256786403] [2021-06-05 03:59:22,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256786403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:22,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437211962] [2021-06-05 03:59:22,905 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:22,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:59:22,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:22,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:22,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:23,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437211962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:23,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:23,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:23,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250710801] [2021-06-05 03:59:23,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:23,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:23,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:23,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:23,095 INFO L87 Difference]: Start difference. First operand 10760 states and 39790 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:23,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:23,287 INFO L93 Difference]: Finished difference Result 11018 states and 40428 transitions. [2021-06-05 03:59:23,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:23,288 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 27 [2021-06-05 03:59:23,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:23,307 INFO L225 Difference]: With dead ends: 11018 [2021-06-05 03:59:23,308 INFO L226 Difference]: Without dead ends: 10908 [2021-06-05 03:59:23,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:23,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10908 states. [2021-06-05 03:59:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10908 to 10812. [2021-06-05 03:59:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10812 states, 10811 states have (on average 3.696790306169642) internal successors, (39966), 10811 states have internal predecessors, (39966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:23,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10812 states to 10812 states and 39966 transitions. [2021-06-05 03:59:23,460 INFO L78 Accepts]: Start accepts. Automaton has 10812 states and 39966 transitions. Word has length 27 [2021-06-05 03:59:23,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:23,460 INFO L482 AbstractCegarLoop]: Abstraction has 10812 states and 39966 transitions. [2021-06-05 03:59:23,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:23,461 INFO L276 IsEmpty]: Start isEmpty. Operand 10812 states and 39966 transitions. [2021-06-05 03:59:23,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:23,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:23,475 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:23,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 03:59:23,676 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:23,676 INFO L82 PathProgramCache]: Analyzing trace with hash -603556108, now seen corresponding path program 48 times [2021-06-05 03:59:23,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:23,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570763224] [2021-06-05 03:59:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:23,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:23,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570763224] [2021-06-05 03:59:23,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570763224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:23,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055896130] [2021-06-05 03:59:23,737 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:23,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 03:59:23,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:23,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:23,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:23,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055896130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:23,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:23,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:23,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820275826] [2021-06-05 03:59:23,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:23,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:23,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:23,889 INFO L87 Difference]: Start difference. First operand 10812 states and 39966 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:24,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:24,102 INFO L93 Difference]: Finished difference Result 11294 states and 41303 transitions. [2021-06-05 03:59:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:24,103 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 27 [2021-06-05 03:59:24,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:24,127 INFO L225 Difference]: With dead ends: 11294 [2021-06-05 03:59:24,127 INFO L226 Difference]: Without dead ends: 11195 [2021-06-05 03:59:24,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:24,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11195 states. [2021-06-05 03:59:24,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11195 to 10917. [2021-06-05 03:59:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10917 states, 10916 states have (on average 3.6943019421033347) internal successors, (40327), 10916 states have internal predecessors, (40327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:24,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10917 states to 10917 states and 40327 transitions. [2021-06-05 03:59:24,320 INFO L78 Accepts]: Start accepts. Automaton has 10917 states and 40327 transitions. Word has length 27 [2021-06-05 03:59:24,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:24,320 INFO L482 AbstractCegarLoop]: Abstraction has 10917 states and 40327 transitions. [2021-06-05 03:59:24,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:24,320 INFO L276 IsEmpty]: Start isEmpty. Operand 10917 states and 40327 transitions. [2021-06-05 03:59:24,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:24,338 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:24,339 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:24,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:24,555 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:24,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:24,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1085062076, now seen corresponding path program 49 times [2021-06-05 03:59:24,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:24,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063785600] [2021-06-05 03:59:24,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:24,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:24,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063785600] [2021-06-05 03:59:24,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063785600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:24,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96669276] [2021-06-05 03:59:24,615 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:24,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:24,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:24,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96669276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:24,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:24,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:24,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118140400] [2021-06-05 03:59:24,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:24,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:24,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:24,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:24,764 INFO L87 Difference]: Start difference. First operand 10917 states and 40327 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:24,981 INFO L93 Difference]: Finished difference Result 11367 states and 41606 transitions. [2021-06-05 03:59:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:24,981 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:24,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:25,001 INFO L225 Difference]: With dead ends: 11367 [2021-06-05 03:59:25,001 INFO L226 Difference]: Without dead ends: 11337 [2021-06-05 03:59:25,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11337 states. [2021-06-05 03:59:25,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11337 to 10979. [2021-06-05 03:59:25,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10979 states, 10978 states have (on average 3.69484423392239) internal successors, (40562), 10978 states have internal predecessors, (40562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10979 states to 10979 states and 40562 transitions. [2021-06-05 03:59:25,147 INFO L78 Accepts]: Start accepts. Automaton has 10979 states and 40562 transitions. Word has length 27 [2021-06-05 03:59:25,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:25,147 INFO L482 AbstractCegarLoop]: Abstraction has 10979 states and 40562 transitions. [2021-06-05 03:59:25,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:25,147 INFO L276 IsEmpty]: Start isEmpty. Operand 10979 states and 40562 transitions. [2021-06-05 03:59:25,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:25,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:25,162 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:25,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 03:59:25,363 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:25,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:25,364 INFO L82 PathProgramCache]: Analyzing trace with hash -70991296, now seen corresponding path program 50 times [2021-06-05 03:59:25,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:25,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182209884] [2021-06-05 03:59:25,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:25,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:25,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182209884] [2021-06-05 03:59:25,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182209884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:25,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948771904] [2021-06-05 03:59:25,424 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:25,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:25,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:25,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:25,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:25,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948771904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:25,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:25,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:25,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213181388] [2021-06-05 03:59:25,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:25,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:25,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:25,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:25,580 INFO L87 Difference]: Start difference. First operand 10979 states and 40562 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:25,789 INFO L93 Difference]: Finished difference Result 11407 states and 41736 transitions. [2021-06-05 03:59:25,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:25,790 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:25,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:25,811 INFO L225 Difference]: With dead ends: 11407 [2021-06-05 03:59:25,811 INFO L226 Difference]: Without dead ends: 11315 [2021-06-05 03:59:25,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 143.2ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11315 states. [2021-06-05 03:59:25,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11315 to 11054. [2021-06-05 03:59:25,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11054 states, 11053 states have (on average 3.694743508549715) internal successors, (40838), 11053 states have internal predecessors, (40838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11054 states to 11054 states and 40838 transitions. [2021-06-05 03:59:26,003 INFO L78 Accepts]: Start accepts. Automaton has 11054 states and 40838 transitions. Word has length 27 [2021-06-05 03:59:26,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:26,003 INFO L482 AbstractCegarLoop]: Abstraction has 11054 states and 40838 transitions. [2021-06-05 03:59:26,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:26,004 INFO L276 IsEmpty]: Start isEmpty. Operand 11054 states and 40838 transitions. [2021-06-05 03:59:26,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:26,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:26,019 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:26,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 03:59:26,219 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:26,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:26,220 INFO L82 PathProgramCache]: Analyzing trace with hash 993593664, now seen corresponding path program 51 times [2021-06-05 03:59:26,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:26,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799705841] [2021-06-05 03:59:26,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:26,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:26,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799705841] [2021-06-05 03:59:26,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799705841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:26,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576278418] [2021-06-05 03:59:26,290 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:26,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:59:26,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:26,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:26,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:26,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576278418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:26,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:26,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:26,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236938401] [2021-06-05 03:59:26,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:26,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:26,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:26,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:26,452 INFO L87 Difference]: Start difference. First operand 11054 states and 40838 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:26,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:26,742 INFO L93 Difference]: Finished difference Result 11235 states and 41375 transitions. [2021-06-05 03:59:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:59:26,742 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 27 [2021-06-05 03:59:26,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:26,764 INFO L225 Difference]: With dead ends: 11235 [2021-06-05 03:59:26,764 INFO L226 Difference]: Without dead ends: 11220 [2021-06-05 03:59:26,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 187.5ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:26,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11220 states. [2021-06-05 03:59:26,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11220 to 11078. [2021-06-05 03:59:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11078 states, 11077 states have (on average 3.6932382414011014) internal successors, (40910), 11077 states have internal predecessors, (40910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:26,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11078 states to 11078 states and 40910 transitions. [2021-06-05 03:59:26,940 INFO L78 Accepts]: Start accepts. Automaton has 11078 states and 40910 transitions. Word has length 27 [2021-06-05 03:59:26,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:26,940 INFO L482 AbstractCegarLoop]: Abstraction has 11078 states and 40910 transitions. [2021-06-05 03:59:26,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:26,940 INFO L276 IsEmpty]: Start isEmpty. Operand 11078 states and 40910 transitions. [2021-06-05 03:59:26,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:26,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:26,957 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:27,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 03:59:27,157 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:27,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:27,158 INFO L82 PathProgramCache]: Analyzing trace with hash 476902960, now seen corresponding path program 52 times [2021-06-05 03:59:27,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:27,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863210597] [2021-06-05 03:59:27,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:27,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:27,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863210597] [2021-06-05 03:59:27,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863210597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:27,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440192439] [2021-06-05 03:59:27,227 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:27,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:27,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:27,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:27,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:27,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440192439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:27,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:27,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:27,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964737364] [2021-06-05 03:59:27,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:27,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:27,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:27,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:27,383 INFO L87 Difference]: Start difference. First operand 11078 states and 40910 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:27,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:27,631 INFO L93 Difference]: Finished difference Result 11379 states and 41715 transitions. [2021-06-05 03:59:27,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:27,631 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 27 [2021-06-05 03:59:27,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:27,652 INFO L225 Difference]: With dead ends: 11379 [2021-06-05 03:59:27,652 INFO L226 Difference]: Without dead ends: 11313 [2021-06-05 03:59:27,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11313 states. [2021-06-05 03:59:27,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11313 to 11126. [2021-06-05 03:59:27,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11126 states, 11125 states have (on average 3.6934831460674156) internal successors, (41090), 11125 states have internal predecessors, (41090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:27,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11126 states to 11126 states and 41090 transitions. [2021-06-05 03:59:27,825 INFO L78 Accepts]: Start accepts. Automaton has 11126 states and 41090 transitions. Word has length 27 [2021-06-05 03:59:27,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:27,826 INFO L482 AbstractCegarLoop]: Abstraction has 11126 states and 41090 transitions. [2021-06-05 03:59:27,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:27,826 INFO L276 IsEmpty]: Start isEmpty. Operand 11126 states and 41090 transitions. [2021-06-05 03:59:27,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:27,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:27,841 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:28,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:28,042 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:28,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:28,042 INFO L82 PathProgramCache]: Analyzing trace with hash 671586292, now seen corresponding path program 53 times [2021-06-05 03:59:28,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:28,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51606678] [2021-06-05 03:59:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:28,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:28,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:28,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51606678] [2021-06-05 03:59:28,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51606678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:28,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396512852] [2021-06-05 03:59:28,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:28,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:59:28,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:28,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:28,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:28,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396512852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:28,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:28,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:28,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188030552] [2021-06-05 03:59:28,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:28,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:28,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:28,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:28,255 INFO L87 Difference]: Start difference. First operand 11126 states and 41090 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:28,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:28,525 INFO L93 Difference]: Finished difference Result 11510 states and 42198 transitions. [2021-06-05 03:59:28,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:28,525 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 27 [2021-06-05 03:59:28,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:28,547 INFO L225 Difference]: With dead ends: 11510 [2021-06-05 03:59:28,547 INFO L226 Difference]: Without dead ends: 11480 [2021-06-05 03:59:28,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11480 states. [2021-06-05 03:59:28,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11480 to 11156. [2021-06-05 03:59:28,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11156 states, 11155 states have (on average 3.696100403406544) internal successors, (41230), 11155 states have internal predecessors, (41230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11156 states to 11156 states and 41230 transitions. [2021-06-05 03:59:28,720 INFO L78 Accepts]: Start accepts. Automaton has 11156 states and 41230 transitions. Word has length 27 [2021-06-05 03:59:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:28,720 INFO L482 AbstractCegarLoop]: Abstraction has 11156 states and 41230 transitions. [2021-06-05 03:59:28,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:28,721 INFO L276 IsEmpty]: Start isEmpty. Operand 11156 states and 41230 transitions. [2021-06-05 03:59:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:28,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:28,736 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:28,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:28,937 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:28,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:28,937 INFO L82 PathProgramCache]: Analyzing trace with hash 941151852, now seen corresponding path program 54 times [2021-06-05 03:59:28,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:28,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896470371] [2021-06-05 03:59:28,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:29,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:29,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896470371] [2021-06-05 03:59:29,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896470371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:29,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309448228] [2021-06-05 03:59:29,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:29,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:59:29,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:29,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:29,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:29,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309448228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:29,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:29,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:29,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817833917] [2021-06-05 03:59:29,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:29,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:29,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:29,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:29,221 INFO L87 Difference]: Start difference. First operand 11156 states and 41230 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:29,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:29,477 INFO L93 Difference]: Finished difference Result 11580 states and 42454 transitions. [2021-06-05 03:59:29,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:29,477 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 27 [2021-06-05 03:59:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:29,499 INFO L225 Difference]: With dead ends: 11580 [2021-06-05 03:59:29,499 INFO L226 Difference]: Without dead ends: 11550 [2021-06-05 03:59:29,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:29,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11550 states. [2021-06-05 03:59:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11550 to 11232. [2021-06-05 03:59:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 11231 states have (on average 3.6960199447956548) internal successors, (41510), 11231 states have internal predecessors, (41510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:29,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 41510 transitions. [2021-06-05 03:59:29,683 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 41510 transitions. Word has length 27 [2021-06-05 03:59:29,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:29,684 INFO L482 AbstractCegarLoop]: Abstraction has 11232 states and 41510 transitions. [2021-06-05 03:59:29,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:29,684 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 41510 transitions. [2021-06-05 03:59:29,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:29,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:29,701 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:29,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:29,902 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:29,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:29,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1135835184, now seen corresponding path program 55 times [2021-06-05 03:59:29,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:29,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596467508] [2021-06-05 03:59:29,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:29,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:29,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596467508] [2021-06-05 03:59:29,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596467508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:29,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076329986] [2021-06-05 03:59:29,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:29,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:29,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:30,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076329986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:30,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:30,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:30,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651037223] [2021-06-05 03:59:30,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:30,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:30,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:30,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:30,119 INFO L87 Difference]: Start difference. First operand 11232 states and 41510 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:30,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:30,377 INFO L93 Difference]: Finished difference Result 11545 states and 42403 transitions. [2021-06-05 03:59:30,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:30,377 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 27 [2021-06-05 03:59:30,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:30,398 INFO L225 Difference]: With dead ends: 11545 [2021-06-05 03:59:30,398 INFO L226 Difference]: Without dead ends: 11507 [2021-06-05 03:59:30,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11507 states. [2021-06-05 03:59:30,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11507 to 11272. [2021-06-05 03:59:30,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11272 states, 11271 states have (on average 3.6969213024576346) internal successors, (41668), 11271 states have internal predecessors, (41668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11272 states to 11272 states and 41668 transitions. [2021-06-05 03:59:30,555 INFO L78 Accepts]: Start accepts. Automaton has 11272 states and 41668 transitions. Word has length 27 [2021-06-05 03:59:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:30,555 INFO L482 AbstractCegarLoop]: Abstraction has 11272 states and 41668 transitions. [2021-06-05 03:59:30,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 11272 states and 41668 transitions. [2021-06-05 03:59:30,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:30,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:30,570 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:30,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:30,771 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:30,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:30,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1936586544, now seen corresponding path program 56 times [2021-06-05 03:59:30,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:30,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406923255] [2021-06-05 03:59:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:30,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:30,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:30,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406923255] [2021-06-05 03:59:30,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406923255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:30,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638710066] [2021-06-05 03:59:30,836 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:30,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:30,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:30,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:30,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:30,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638710066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:30,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:30,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:30,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397318205] [2021-06-05 03:59:30,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:30,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:30,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:30,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:30,994 INFO L87 Difference]: Start difference. First operand 11272 states and 41668 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:31,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:31,235 INFO L93 Difference]: Finished difference Result 11437 states and 42157 transitions. [2021-06-05 03:59:31,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:59:31,235 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 27 [2021-06-05 03:59:31,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:31,255 INFO L225 Difference]: With dead ends: 11437 [2021-06-05 03:59:31,255 INFO L226 Difference]: Without dead ends: 11422 [2021-06-05 03:59:31,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11422 states. [2021-06-05 03:59:31,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11422 to 11302. [2021-06-05 03:59:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11302 states, 11301 states have (on average 3.6956021591009645) internal successors, (41764), 11301 states have internal predecessors, (41764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11302 states to 11302 states and 41764 transitions. [2021-06-05 03:59:31,413 INFO L78 Accepts]: Start accepts. Automaton has 11302 states and 41764 transitions. Word has length 27 [2021-06-05 03:59:31,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:31,413 INFO L482 AbstractCegarLoop]: Abstraction has 11302 states and 41764 transitions. [2021-06-05 03:59:31,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:31,413 INFO L276 IsEmpty]: Start isEmpty. Operand 11302 states and 41764 transitions. [2021-06-05 03:59:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:31,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:31,429 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:31,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-05 03:59:31,629 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:31,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:31,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1960365508, now seen corresponding path program 57 times [2021-06-05 03:59:31,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:31,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303229230] [2021-06-05 03:59:31,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:31,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:31,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:31,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303229230] [2021-06-05 03:59:31,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303229230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:31,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649508321] [2021-06-05 03:59:31,684 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:31,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:59:31,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:31,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:31,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:31,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649508321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:31,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:31,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:31,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139468673] [2021-06-05 03:59:31,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:31,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:31,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:31,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:31,824 INFO L87 Difference]: Start difference. First operand 11302 states and 41764 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:32,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:32,004 INFO L93 Difference]: Finished difference Result 11677 states and 42772 transitions. [2021-06-05 03:59:32,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:32,005 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:32,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:32,024 INFO L225 Difference]: With dead ends: 11677 [2021-06-05 03:59:32,024 INFO L226 Difference]: Without dead ends: 11625 [2021-06-05 03:59:32,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:32,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11625 states. [2021-06-05 03:59:32,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11625 to 11308. [2021-06-05 03:59:32,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11308 states, 11307 states have (on average 3.6952330414787298) internal successors, (41782), 11307 states have internal predecessors, (41782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:32,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11308 states to 11308 states and 41782 transitions. [2021-06-05 03:59:32,295 INFO L78 Accepts]: Start accepts. Automaton has 11308 states and 41782 transitions. Word has length 27 [2021-06-05 03:59:32,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:32,296 INFO L482 AbstractCegarLoop]: Abstraction has 11308 states and 41782 transitions. [2021-06-05 03:59:32,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 11308 states and 41782 transitions. [2021-06-05 03:59:32,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:32,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:32,317 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:32,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:32,517 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:32,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:32,518 INFO L82 PathProgramCache]: Analyzing trace with hash 352248576, now seen corresponding path program 58 times [2021-06-05 03:59:32,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:32,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784022300] [2021-06-05 03:59:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:32,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:32,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784022300] [2021-06-05 03:59:32,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784022300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:32,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839234839] [2021-06-05 03:59:32,579 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:32,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:32,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:32,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:32,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:32,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839234839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:32,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:32,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:32,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015257289] [2021-06-05 03:59:32,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:32,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:32,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:32,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:32,752 INFO L87 Difference]: Start difference. First operand 11308 states and 41782 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:32,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:32,944 INFO L93 Difference]: Finished difference Result 11704 states and 42906 transitions. [2021-06-05 03:59:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:32,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:32,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:32,966 INFO L225 Difference]: With dead ends: 11704 [2021-06-05 03:59:32,967 INFO L226 Difference]: Without dead ends: 11674 [2021-06-05 03:59:32,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:32,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11674 states. [2021-06-05 03:59:33,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11674 to 11310. [2021-06-05 03:59:33,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11310 states, 11309 states have (on average 3.695463789901848) internal successors, (41792), 11309 states have internal predecessors, (41792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11310 states to 11310 states and 41792 transitions. [2021-06-05 03:59:33,177 INFO L78 Accepts]: Start accepts. Automaton has 11310 states and 41792 transitions. Word has length 27 [2021-06-05 03:59:33,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:33,177 INFO L482 AbstractCegarLoop]: Abstraction has 11310 states and 41792 transitions. [2021-06-05 03:59:33,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:33,178 INFO L276 IsEmpty]: Start isEmpty. Operand 11310 states and 41792 transitions. [2021-06-05 03:59:33,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:33,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:33,194 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:33,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 03:59:33,394 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:33,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:33,395 INFO L82 PathProgramCache]: Analyzing trace with hash -531126336, now seen corresponding path program 59 times [2021-06-05 03:59:33,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:33,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056843342] [2021-06-05 03:59:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:33,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:33,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056843342] [2021-06-05 03:59:33,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056843342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:33,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096543033] [2021-06-05 03:59:33,460 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:33,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:59:33,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:33,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:33,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:33,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096543033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:33,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:33,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:33,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013100301] [2021-06-05 03:59:33,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:33,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:33,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:33,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:33,633 INFO L87 Difference]: Start difference. First operand 11310 states and 41792 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:33,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:33,818 INFO L93 Difference]: Finished difference Result 11586 states and 42494 transitions. [2021-06-05 03:59:33,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:33,819 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:33,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:33,840 INFO L225 Difference]: With dead ends: 11586 [2021-06-05 03:59:33,840 INFO L226 Difference]: Without dead ends: 11512 [2021-06-05 03:59:33,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:33,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11512 states. [2021-06-05 03:59:33,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11512 to 11372. [2021-06-05 03:59:33,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11372 states, 11371 states have (on average 3.692639169817958) internal successors, (41989), 11371 states have internal predecessors, (41989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11372 states to 11372 states and 41989 transitions. [2021-06-05 03:59:34,022 INFO L78 Accepts]: Start accepts. Automaton has 11372 states and 41989 transitions. Word has length 27 [2021-06-05 03:59:34,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:34,022 INFO L482 AbstractCegarLoop]: Abstraction has 11372 states and 41989 transitions. [2021-06-05 03:59:34,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:34,023 INFO L276 IsEmpty]: Start isEmpty. Operand 11372 states and 41989 transitions. [2021-06-05 03:59:34,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:34,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:34,039 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:34,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:34,241 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:34,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:34,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1957542588, now seen corresponding path program 60 times [2021-06-05 03:59:34,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:34,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393256437] [2021-06-05 03:59:34,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:34,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 03:59:34,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:34,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393256437] [2021-06-05 03:59:34,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393256437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:34,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588753984] [2021-06-05 03:59:34,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:34,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:59:34,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:34,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:34,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:34,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588753984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:34,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:34,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:34,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819054100] [2021-06-05 03:59:34,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:34,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:34,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:34,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:34,432 INFO L87 Difference]: Start difference. First operand 11372 states and 41989 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:34,671 INFO L93 Difference]: Finished difference Result 11723 states and 42964 transitions. [2021-06-05 03:59:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:34,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:34,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:34,693 INFO L225 Difference]: With dead ends: 11723 [2021-06-05 03:59:34,693 INFO L226 Difference]: Without dead ends: 11685 [2021-06-05 03:59:34,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:34,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11685 states. [2021-06-05 03:59:34,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11685 to 11411. [2021-06-05 03:59:34,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11411 states, 11410 states have (on average 3.692900964066608) internal successors, (42136), 11410 states have internal predecessors, (42136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:34,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11411 states to 11411 states and 42136 transitions. [2021-06-05 03:59:34,862 INFO L78 Accepts]: Start accepts. Automaton has 11411 states and 42136 transitions. Word has length 27 [2021-06-05 03:59:34,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:34,862 INFO L482 AbstractCegarLoop]: Abstraction has 11411 states and 42136 transitions. [2021-06-05 03:59:34,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 11411 states and 42136 transitions. [2021-06-05 03:59:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:34,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:34,878 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:35,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 03:59:35,079 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:35,079 INFO L82 PathProgramCache]: Analyzing trace with hash -889299460, now seen corresponding path program 61 times [2021-06-05 03:59:35,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:35,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133727553] [2021-06-05 03:59:35,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:35,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:35,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133727553] [2021-06-05 03:59:35,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133727553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:35,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019542418] [2021-06-05 03:59:35,139 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:35,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:35,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:35,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019542418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:35,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:35,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:35,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194779838] [2021-06-05 03:59:35,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:35,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:35,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:35,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:35,290 INFO L87 Difference]: Start difference. First operand 11411 states and 42136 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:35,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:35,526 INFO L93 Difference]: Finished difference Result 11793 states and 43179 transitions. [2021-06-05 03:59:35,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:35,527 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 27 [2021-06-05 03:59:35,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:35,550 INFO L225 Difference]: With dead ends: 11793 [2021-06-05 03:59:35,550 INFO L226 Difference]: Without dead ends: 11741 [2021-06-05 03:59:35,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:35,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11741 states. [2021-06-05 03:59:35,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11741 to 11475. [2021-06-05 03:59:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11475 states, 11474 states have (on average 3.6911277671256753) internal successors, (42352), 11474 states have internal predecessors, (42352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11475 states to 11475 states and 42352 transitions. [2021-06-05 03:59:35,797 INFO L78 Accepts]: Start accepts. Automaton has 11475 states and 42352 transitions. Word has length 27 [2021-06-05 03:59:35,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:35,797 INFO L482 AbstractCegarLoop]: Abstraction has 11475 states and 42352 transitions. [2021-06-05 03:59:35,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:35,798 INFO L276 IsEmpty]: Start isEmpty. Operand 11475 states and 42352 transitions. [2021-06-05 03:59:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:35,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:35,814 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:36,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:36,014 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:36,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:36,015 INFO L82 PathProgramCache]: Analyzing trace with hash -421900604, now seen corresponding path program 62 times [2021-06-05 03:59:36,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:36,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995704595] [2021-06-05 03:59:36,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:36,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:36,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995704595] [2021-06-05 03:59:36,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995704595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:36,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844655784] [2021-06-05 03:59:36,111 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:36,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:36,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:36,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:36,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:36,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844655784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:36,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:36,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:36,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642849788] [2021-06-05 03:59:36,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:36,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:36,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:36,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:36,283 INFO L87 Difference]: Start difference. First operand 11475 states and 42352 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:36,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:36,472 INFO L93 Difference]: Finished difference Result 11715 states and 42996 transitions. [2021-06-05 03:59:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:36,473 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 27 [2021-06-05 03:59:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:36,494 INFO L225 Difference]: With dead ends: 11715 [2021-06-05 03:59:36,494 INFO L226 Difference]: Without dead ends: 11659 [2021-06-05 03:59:36,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:36,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11659 states. [2021-06-05 03:59:36,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11659 to 11503. [2021-06-05 03:59:36,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11503 states, 11502 states have (on average 3.691531907494349) internal successors, (42460), 11502 states have internal predecessors, (42460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11503 states to 11503 states and 42460 transitions. [2021-06-05 03:59:36,656 INFO L78 Accepts]: Start accepts. Automaton has 11503 states and 42460 transitions. Word has length 27 [2021-06-05 03:59:36,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:36,656 INFO L482 AbstractCegarLoop]: Abstraction has 11503 states and 42460 transitions. [2021-06-05 03:59:36,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:36,656 INFO L276 IsEmpty]: Start isEmpty. Operand 11503 states and 42460 transitions. [2021-06-05 03:59:36,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:36,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:36,671 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:36,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:36,872 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:36,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:36,872 INFO L82 PathProgramCache]: Analyzing trace with hash 85705924, now seen corresponding path program 63 times [2021-06-05 03:59:36,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:36,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239568067] [2021-06-05 03:59:36,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:36,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:36,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:36,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239568067] [2021-06-05 03:59:36,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239568067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:36,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662965706] [2021-06-05 03:59:36,938 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:36,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 03:59:36,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:36,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:36,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:37,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:37,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662965706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:37,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:37,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:37,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91993363] [2021-06-05 03:59:37,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:37,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:37,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:37,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:37,112 INFO L87 Difference]: Start difference. First operand 11503 states and 42460 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:37,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:37,318 INFO L93 Difference]: Finished difference Result 11675 states and 42930 transitions. [2021-06-05 03:59:37,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:59:37,318 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 27 [2021-06-05 03:59:37,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:37,339 INFO L225 Difference]: With dead ends: 11675 [2021-06-05 03:59:37,339 INFO L226 Difference]: Without dead ends: 11649 [2021-06-05 03:59:37,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:37,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11649 states. [2021-06-05 03:59:37,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11649 to 11510. [2021-06-05 03:59:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11510 states, 11509 states have (on average 3.6920670779390043) internal successors, (42492), 11509 states have internal predecessors, (42492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11510 states to 11510 states and 42492 transitions. [2021-06-05 03:59:37,503 INFO L78 Accepts]: Start accepts. Automaton has 11510 states and 42492 transitions. Word has length 27 [2021-06-05 03:59:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:37,503 INFO L482 AbstractCegarLoop]: Abstraction has 11510 states and 42492 transitions. [2021-06-05 03:59:37,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:37,504 INFO L276 IsEmpty]: Start isEmpty. Operand 11510 states and 42492 transitions. [2021-06-05 03:59:37,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:37,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:37,520 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:37,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-06-05 03:59:37,720 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:37,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:37,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1402020932, now seen corresponding path program 64 times [2021-06-05 03:59:37,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:37,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847221760] [2021-06-05 03:59:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:37,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:37,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847221760] [2021-06-05 03:59:37,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847221760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:37,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505867332] [2021-06-05 03:59:37,783 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:37,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:37,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:37,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:37,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:37,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505867332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:37,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:37,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:37,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709493190] [2021-06-05 03:59:37,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:37,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:37,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:37,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:37,934 INFO L87 Difference]: Start difference. First operand 11510 states and 42492 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:38,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:38,215 INFO L93 Difference]: Finished difference Result 12092 states and 44144 transitions. [2021-06-05 03:59:38,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:38,216 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 27 [2021-06-05 03:59:38,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:38,237 INFO L225 Difference]: With dead ends: 12092 [2021-06-05 03:59:38,238 INFO L226 Difference]: Without dead ends: 12062 [2021-06-05 03:59:38,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:38,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12062 states. [2021-06-05 03:59:38,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12062 to 11576. [2021-06-05 03:59:38,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11576 states, 11575 states have (on average 3.691317494600432) internal successors, (42727), 11575 states have internal predecessors, (42727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11576 states to 11576 states and 42727 transitions. [2021-06-05 03:59:38,411 INFO L78 Accepts]: Start accepts. Automaton has 11576 states and 42727 transitions. Word has length 27 [2021-06-05 03:59:38,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:38,411 INFO L482 AbstractCegarLoop]: Abstraction has 11576 states and 42727 transitions. [2021-06-05 03:59:38,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:38,411 INFO L276 IsEmpty]: Start isEmpty. Operand 11576 states and 42727 transitions. [2021-06-05 03:59:38,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:38,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:38,426 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:38,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:38,627 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:38,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:38,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1736892992, now seen corresponding path program 65 times [2021-06-05 03:59:38,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:38,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130002617] [2021-06-05 03:59:38,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:38,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:38,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130002617] [2021-06-05 03:59:38,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130002617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:38,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621934006] [2021-06-05 03:59:38,687 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:38,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:59:38,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:38,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:38,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:38,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621934006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:38,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:38,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:38,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272881123] [2021-06-05 03:59:38,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:38,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:38,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:38,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:38,847 INFO L87 Difference]: Start difference. First operand 11576 states and 42727 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:39,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:39,107 INFO L93 Difference]: Finished difference Result 11997 states and 43864 transitions. [2021-06-05 03:59:39,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:39,108 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 27 [2021-06-05 03:59:39,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:39,129 INFO L225 Difference]: With dead ends: 11997 [2021-06-05 03:59:39,129 INFO L226 Difference]: Without dead ends: 11917 [2021-06-05 03:59:39,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:39,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11917 states. [2021-06-05 03:59:39,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11917 to 11602. [2021-06-05 03:59:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11602 states, 11601 states have (on average 3.6938194983191104) internal successors, (42852), 11601 states have internal predecessors, (42852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11602 states to 11602 states and 42852 transitions. [2021-06-05 03:59:39,314 INFO L78 Accepts]: Start accepts. Automaton has 11602 states and 42852 transitions. Word has length 27 [2021-06-05 03:59:39,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:39,314 INFO L482 AbstractCegarLoop]: Abstraction has 11602 states and 42852 transitions. [2021-06-05 03:59:39,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:39,314 INFO L276 IsEmpty]: Start isEmpty. Operand 11602 states and 42852 transitions. [2021-06-05 03:59:39,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:39,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:39,331 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:39,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:39,532 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:39,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:39,532 INFO L82 PathProgramCache]: Analyzing trace with hash -73533572, now seen corresponding path program 66 times [2021-06-05 03:59:39,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:39,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871377843] [2021-06-05 03:59:39,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:39,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:39,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871377843] [2021-06-05 03:59:39,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871377843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:39,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524185995] [2021-06-05 03:59:39,656 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:39,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:59:39,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:39,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:39,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:39,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524185995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:39,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:39,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:39,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118497106] [2021-06-05 03:59:39,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:39,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:39,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:39,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:39,822 INFO L87 Difference]: Start difference. First operand 11602 states and 42852 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:40,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:40,057 INFO L93 Difference]: Finished difference Result 11771 states and 43353 transitions. [2021-06-05 03:59:40,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:59:40,058 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 27 [2021-06-05 03:59:40,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:40,080 INFO L225 Difference]: With dead ends: 11771 [2021-06-05 03:59:40,080 INFO L226 Difference]: Without dead ends: 11756 [2021-06-05 03:59:40,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:40,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11756 states. [2021-06-05 03:59:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11756 to 11607. [2021-06-05 03:59:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11607 states, 11606 states have (on average 3.694468378424953) internal successors, (42878), 11606 states have internal predecessors, (42878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:40,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11607 states to 11607 states and 42878 transitions. [2021-06-05 03:59:40,241 INFO L78 Accepts]: Start accepts. Automaton has 11607 states and 42878 transitions. Word has length 27 [2021-06-05 03:59:40,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:40,241 INFO L482 AbstractCegarLoop]: Abstraction has 11607 states and 42878 transitions. [2021-06-05 03:59:40,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:40,242 INFO L276 IsEmpty]: Start isEmpty. Operand 11607 states and 42878 transitions. [2021-06-05 03:59:40,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:40,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:40,257 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:40,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-05 03:59:40,458 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:40,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:40,458 INFO L82 PathProgramCache]: Analyzing trace with hash -819151172, now seen corresponding path program 67 times [2021-06-05 03:59:40,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:40,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001459365] [2021-06-05 03:59:40,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:40,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:40,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:40,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001459365] [2021-06-05 03:59:40,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001459365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:40,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059486858] [2021-06-05 03:59:40,516 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:40,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:40,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:40,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059486858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:40,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:40,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:40,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738330180] [2021-06-05 03:59:40,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:40,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:40,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:40,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:40,677 INFO L87 Difference]: Start difference. First operand 11607 states and 42878 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:40,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:40,924 INFO L93 Difference]: Finished difference Result 13036 states and 47204 transitions. [2021-06-05 03:59:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 03:59:40,924 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 27 [2021-06-05 03:59:40,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:40,951 INFO L225 Difference]: With dead ends: 13036 [2021-06-05 03:59:40,951 INFO L226 Difference]: Without dead ends: 12976 [2021-06-05 03:59:40,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 154.3ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:40,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12976 states. [2021-06-05 03:59:41,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12976 to 11956. [2021-06-05 03:59:41,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11956 states, 11955 states have (on average 3.700710999581765) internal successors, (44242), 11955 states have internal predecessors, (44242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:41,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11956 states to 11956 states and 44242 transitions. [2021-06-05 03:59:41,149 INFO L78 Accepts]: Start accepts. Automaton has 11956 states and 44242 transitions. Word has length 27 [2021-06-05 03:59:41,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:41,149 INFO L482 AbstractCegarLoop]: Abstraction has 11956 states and 44242 transitions. [2021-06-05 03:59:41,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:41,149 INFO L276 IsEmpty]: Start isEmpty. Operand 11956 states and 44242 transitions. [2021-06-05 03:59:41,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:41,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:41,167 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:41,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:41,377 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:41,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:41,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1181413760, now seen corresponding path program 68 times [2021-06-05 03:59:41,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:41,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615739137] [2021-06-05 03:59:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:41,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:41,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615739137] [2021-06-05 03:59:41,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615739137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:41,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413704831] [2021-06-05 03:59:41,447 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:41,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:41,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:41,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:41,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:41,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413704831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:41,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:41,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:41,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365853679] [2021-06-05 03:59:41,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:41,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:41,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:41,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:41,590 INFO L87 Difference]: Start difference. First operand 11956 states and 44242 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:41,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:41,749 INFO L93 Difference]: Finished difference Result 12395 states and 45519 transitions. [2021-06-05 03:59:41,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:59:41,749 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:41,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:41,773 INFO L225 Difference]: With dead ends: 12395 [2021-06-05 03:59:41,773 INFO L226 Difference]: Without dead ends: 12365 [2021-06-05 03:59:41,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12365 states. [2021-06-05 03:59:41,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12365 to 11952. [2021-06-05 03:59:41,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11952 states, 11951 states have (on average 3.7014475776085685) internal successors, (44236), 11951 states have internal predecessors, (44236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:41,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11952 states to 11952 states and 44236 transitions. [2021-06-05 03:59:41,935 INFO L78 Accepts]: Start accepts. Automaton has 11952 states and 44236 transitions. Word has length 27 [2021-06-05 03:59:41,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:41,935 INFO L482 AbstractCegarLoop]: Abstraction has 11952 states and 44236 transitions. [2021-06-05 03:59:41,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:41,935 INFO L276 IsEmpty]: Start isEmpty. Operand 11952 states and 44236 transitions. [2021-06-05 03:59:41,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:41,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:41,951 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:42,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 03:59:42,153 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:42,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:42,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1510401284, now seen corresponding path program 69 times [2021-06-05 03:59:42,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:42,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209111988] [2021-06-05 03:59:42,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:42,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:42,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209111988] [2021-06-05 03:59:42,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209111988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:42,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837262667] [2021-06-05 03:59:42,212 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:42,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:59:42,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:42,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:42,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:42,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837262667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:42,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:42,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:42,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375914920] [2021-06-05 03:59:42,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:42,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:42,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:42,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:42,372 INFO L87 Difference]: Start difference. First operand 11952 states and 44236 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:42,554 INFO L93 Difference]: Finished difference Result 12368 states and 45416 transitions. [2021-06-05 03:59:42,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:42,555 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:42,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:42,580 INFO L225 Difference]: With dead ends: 12368 [2021-06-05 03:59:42,580 INFO L226 Difference]: Without dead ends: 12338 [2021-06-05 03:59:42,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:42,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12338 states. [2021-06-05 03:59:42,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12338 to 11996. [2021-06-05 03:59:42,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11996 states, 11995 states have (on average 3.7018757815756564) internal successors, (44404), 11995 states have internal predecessors, (44404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:42,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11996 states to 11996 states and 44404 transitions. [2021-06-05 03:59:42,756 INFO L78 Accepts]: Start accepts. Automaton has 11996 states and 44404 transitions. Word has length 27 [2021-06-05 03:59:42,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:42,756 INFO L482 AbstractCegarLoop]: Abstraction has 11996 states and 44404 transitions. [2021-06-05 03:59:42,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:42,756 INFO L276 IsEmpty]: Start isEmpty. Operand 11996 states and 44404 transitions. [2021-06-05 03:59:42,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:42,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:42,773 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:42,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 03:59:42,973 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:42,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:42,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1977800140, now seen corresponding path program 70 times [2021-06-05 03:59:42,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:42,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960615706] [2021-06-05 03:59:42,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:43,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:43,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:43,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960615706] [2021-06-05 03:59:43,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960615706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:43,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942086648] [2021-06-05 03:59:43,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:43,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:43,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:43,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:43,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:43,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942086648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:43,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:43,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:43,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333014368] [2021-06-05 03:59:43,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:43,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:43,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:43,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:43,170 INFO L87 Difference]: Start difference. First operand 11996 states and 44404 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:43,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:43,437 INFO L93 Difference]: Finished difference Result 12466 states and 45766 transitions. [2021-06-05 03:59:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:43,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:43,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:43,461 INFO L225 Difference]: With dead ends: 12466 [2021-06-05 03:59:43,461 INFO L226 Difference]: Without dead ends: 12395 [2021-06-05 03:59:43,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:43,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12395 states. [2021-06-05 03:59:43,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12395 to 12062. [2021-06-05 03:59:43,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12062 states, 12061 states have (on average 3.7025951413647293) internal successors, (44657), 12061 states have internal predecessors, (44657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12062 states to 12062 states and 44657 transitions. [2021-06-05 03:59:43,640 INFO L78 Accepts]: Start accepts. Automaton has 12062 states and 44657 transitions. Word has length 27 [2021-06-05 03:59:43,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:43,640 INFO L482 AbstractCegarLoop]: Abstraction has 12062 states and 44657 transitions. [2021-06-05 03:59:43,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:43,640 INFO L276 IsEmpty]: Start isEmpty. Operand 12062 states and 44657 transitions. [2021-06-05 03:59:43,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:43,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:43,657 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:43,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 03:59:43,858 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:43,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:43,858 INFO L82 PathProgramCache]: Analyzing trace with hash -387127492, now seen corresponding path program 71 times [2021-06-05 03:59:43,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:43,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251050448] [2021-06-05 03:59:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:43,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:43,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251050448] [2021-06-05 03:59:43,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251050448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:43,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846341795] [2021-06-05 03:59:43,921 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:43,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 03:59:43,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:43,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:43,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:44,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846341795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:44,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:44,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:44,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263027377] [2021-06-05 03:59:44,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:44,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:44,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:44,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:44,069 INFO L87 Difference]: Start difference. First operand 12062 states and 44657 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:44,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:44,243 INFO L93 Difference]: Finished difference Result 12451 states and 45748 transitions. [2021-06-05 03:59:44,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:59:44,244 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:44,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:44,270 INFO L225 Difference]: With dead ends: 12451 [2021-06-05 03:59:44,270 INFO L226 Difference]: Without dead ends: 12413 [2021-06-05 03:59:44,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:44,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12413 states. [2021-06-05 03:59:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12413 to 12104. [2021-06-05 03:59:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 3.702883582582831) internal successors, (44816), 12103 states have internal predecessors, (44816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 44816 transitions. [2021-06-05 03:59:44,453 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 44816 transitions. Word has length 27 [2021-06-05 03:59:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:44,453 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 44816 transitions. [2021-06-05 03:59:44,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 44816 transitions. [2021-06-05 03:59:44,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:44,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:44,471 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:44,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:44,672 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:44,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:44,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1978137212, now seen corresponding path program 72 times [2021-06-05 03:59:44,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:44,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133623375] [2021-06-05 03:59:44,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:44,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:44,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133623375] [2021-06-05 03:59:44,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133623375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:44,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869720860] [2021-06-05 03:59:44,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:44,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:59:44,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:44,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:44,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:44,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869720860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:44,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:44,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:44,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083752302] [2021-06-05 03:59:44,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:44,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:44,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:44,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:44,938 INFO L87 Difference]: Start difference. First operand 12104 states and 44816 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:45,207 INFO L93 Difference]: Finished difference Result 12499 states and 45950 transitions. [2021-06-05 03:59:45,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:45,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:45,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:45,236 INFO L225 Difference]: With dead ends: 12499 [2021-06-05 03:59:45,237 INFO L226 Difference]: Without dead ends: 12469 [2021-06-05 03:59:45,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:45,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12469 states. [2021-06-05 03:59:45,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12469 to 12148. [2021-06-05 03:59:45,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12148 states, 12147 states have (on average 3.7034658763480697) internal successors, (44986), 12147 states have internal predecessors, (44986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12148 states to 12148 states and 44986 transitions. [2021-06-05 03:59:45,446 INFO L78 Accepts]: Start accepts. Automaton has 12148 states and 44986 transitions. Word has length 27 [2021-06-05 03:59:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:45,446 INFO L482 AbstractCegarLoop]: Abstraction has 12148 states and 44986 transitions. [2021-06-05 03:59:45,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:45,446 INFO L276 IsEmpty]: Start isEmpty. Operand 12148 states and 44986 transitions. [2021-06-05 03:59:45,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:45,466 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:45,466 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:45,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:45,666 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:45,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:45,667 INFO L82 PathProgramCache]: Analyzing trace with hash -4216000, now seen corresponding path program 73 times [2021-06-05 03:59:45,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:45,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097383810] [2021-06-05 03:59:45,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:45,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:45,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:45,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097383810] [2021-06-05 03:59:45,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097383810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:45,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825587916] [2021-06-05 03:59:45,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:45,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:45,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:45,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825587916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:45,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:45,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:45,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915589364] [2021-06-05 03:59:45,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:45,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:45,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:45,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:45,870 INFO L87 Difference]: Start difference. First operand 12148 states and 44986 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:46,079 INFO L93 Difference]: Finished difference Result 12648 states and 46358 transitions. [2021-06-05 03:59:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:46,080 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:46,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:46,104 INFO L225 Difference]: With dead ends: 12648 [2021-06-05 03:59:46,104 INFO L226 Difference]: Without dead ends: 12604 [2021-06-05 03:59:46,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12604 states. [2021-06-05 03:59:46,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12604 to 12166. [2021-06-05 03:59:46,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12166 states, 12165 states have (on average 3.705219893136046) internal successors, (45074), 12165 states have internal predecessors, (45074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:46,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12166 states to 12166 states and 45074 transitions. [2021-06-05 03:59:46,308 INFO L78 Accepts]: Start accepts. Automaton has 12166 states and 45074 transitions. Word has length 27 [2021-06-05 03:59:46,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:46,308 INFO L482 AbstractCegarLoop]: Abstraction has 12166 states and 45074 transitions. [2021-06-05 03:59:46,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 12166 states and 45074 transitions. [2021-06-05 03:59:46,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:46,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:46,327 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:46,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:46,543 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:46,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:46,543 INFO L82 PathProgramCache]: Analyzing trace with hash 903412800, now seen corresponding path program 74 times [2021-06-05 03:59:46,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:46,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456605478] [2021-06-05 03:59:46,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:46,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:46,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456605478] [2021-06-05 03:59:46,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456605478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:46,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467234848] [2021-06-05 03:59:46,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:46,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:46,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:46,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:46,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:46,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:46,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467234848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:46,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:46,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 03:59:46,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416378114] [2021-06-05 03:59:46,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 03:59:46,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:46,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 03:59:46,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 03:59:46,740 INFO L87 Difference]: Start difference. First operand 12166 states and 45074 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:46,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:46,964 INFO L93 Difference]: Finished difference Result 12571 states and 46145 transitions. [2021-06-05 03:59:46,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:46,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 27 [2021-06-05 03:59:46,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:46,988 INFO L225 Difference]: With dead ends: 12571 [2021-06-05 03:59:46,989 INFO L226 Difference]: Without dead ends: 12515 [2021-06-05 03:59:46,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 03:59:47,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12515 states. [2021-06-05 03:59:47,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12515 to 12209. [2021-06-05 03:59:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12209 states, 12208 states have (on average 3.705848623853211) internal successors, (45241), 12208 states have internal predecessors, (45241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12209 states to 12209 states and 45241 transitions. [2021-06-05 03:59:47,220 INFO L78 Accepts]: Start accepts. Automaton has 12209 states and 45241 transitions. Word has length 27 [2021-06-05 03:59:47,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:47,220 INFO L482 AbstractCegarLoop]: Abstraction has 12209 states and 45241 transitions. [2021-06-05 03:59:47,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:47,220 INFO L276 IsEmpty]: Start isEmpty. Operand 12209 states and 45241 transitions. [2021-06-05 03:59:47,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:47,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:47,239 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:47,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:47,439 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:47,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:47,440 INFO L82 PathProgramCache]: Analyzing trace with hash -995116224, now seen corresponding path program 75 times [2021-06-05 03:59:47,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:47,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561821995] [2021-06-05 03:59:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:47,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:47,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:47,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561821995] [2021-06-05 03:59:47,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561821995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:47,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629768148] [2021-06-05 03:59:47,491 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:47,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:59:47,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:47,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:47,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:47,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629768148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:47,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:47,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:47,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111801526] [2021-06-05 03:59:47,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:47,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:47,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:47,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:47,639 INFO L87 Difference]: Start difference. First operand 12209 states and 45241 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:47,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:47,913 INFO L93 Difference]: Finished difference Result 12816 states and 46949 transitions. [2021-06-05 03:59:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:47,914 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 27 [2021-06-05 03:59:47,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:47,937 INFO L225 Difference]: With dead ends: 12816 [2021-06-05 03:59:47,937 INFO L226 Difference]: Without dead ends: 12786 [2021-06-05 03:59:47,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:47,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12786 states. [2021-06-05 03:59:48,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12786 to 12267. [2021-06-05 03:59:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12267 states, 12266 states have (on average 3.7053644219794553) internal successors, (45450), 12266 states have internal predecessors, (45450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12267 states to 12267 states and 45450 transitions. [2021-06-05 03:59:48,117 INFO L78 Accepts]: Start accepts. Automaton has 12267 states and 45450 transitions. Word has length 27 [2021-06-05 03:59:48,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:48,118 INFO L482 AbstractCegarLoop]: Abstraction has 12267 states and 45450 transitions. [2021-06-05 03:59:48,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:48,118 INFO L276 IsEmpty]: Start isEmpty. Operand 12267 states and 45450 transitions. [2021-06-05 03:59:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:48,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:48,134 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:48,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-05 03:59:48,335 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:48,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:48,335 INFO L82 PathProgramCache]: Analyzing trace with hash -527717368, now seen corresponding path program 76 times [2021-06-05 03:59:48,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:48,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008667351] [2021-06-05 03:59:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:48,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:48,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008667351] [2021-06-05 03:59:48,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008667351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:48,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865390487] [2021-06-05 03:59:48,403 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:48,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:48,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:48,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:48,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:48,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865390487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:48,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:48,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:48,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765031499] [2021-06-05 03:59:48,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:48,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:48,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:48,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:48,557 INFO L87 Difference]: Start difference. First operand 12267 states and 45450 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:48,807 INFO L93 Difference]: Finished difference Result 12669 states and 46586 transitions. [2021-06-05 03:59:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:48,808 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 27 [2021-06-05 03:59:48,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:48,833 INFO L225 Difference]: With dead ends: 12669 [2021-06-05 03:59:48,833 INFO L226 Difference]: Without dead ends: 12631 [2021-06-05 03:59:48,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:48,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12631 states. [2021-06-05 03:59:48,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 12291. [2021-06-05 03:59:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12291 states, 12290 states have (on average 3.7069975589910498) internal successors, (45559), 12290 states have internal predecessors, (45559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12291 states to 12291 states and 45559 transitions. [2021-06-05 03:59:49,024 INFO L78 Accepts]: Start accepts. Automaton has 12291 states and 45559 transitions. Word has length 27 [2021-06-05 03:59:49,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:49,025 INFO L482 AbstractCegarLoop]: Abstraction has 12291 states and 45559 transitions. [2021-06-05 03:59:49,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:49,025 INFO L276 IsEmpty]: Start isEmpty. Operand 12291 states and 45559 transitions. [2021-06-05 03:59:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:49,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:49,042 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:49,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:49,243 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:49,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:49,243 INFO L82 PathProgramCache]: Analyzing trace with hash -20110840, now seen corresponding path program 77 times [2021-06-05 03:59:49,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:49,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654197630] [2021-06-05 03:59:49,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:49,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:49,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654197630] [2021-06-05 03:59:49,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654197630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:49,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148272180] [2021-06-05 03:59:49,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:49,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 03:59:49,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:49,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:49,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:49,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:49,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148272180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:49,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:49,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:49,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692769907] [2021-06-05 03:59:49,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:49,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:49,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:49,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:49,457 INFO L87 Difference]: Start difference. First operand 12291 states and 45559 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:49,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:49,740 INFO L93 Difference]: Finished difference Result 12456 states and 46048 transitions. [2021-06-05 03:59:49,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:59:49,741 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 27 [2021-06-05 03:59:49,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:49,763 INFO L225 Difference]: With dead ends: 12456 [2021-06-05 03:59:49,763 INFO L226 Difference]: Without dead ends: 12441 [2021-06-05 03:59:49,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:59:49,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12441 states. [2021-06-05 03:59:49,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12441 to 12288. [2021-06-05 03:59:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12288 states, 12287 states have (on average 3.7083909823390577) internal successors, (45565), 12287 states have internal predecessors, (45565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:49,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12288 states to 12288 states and 45565 transitions. [2021-06-05 03:59:49,935 INFO L78 Accepts]: Start accepts. Automaton has 12288 states and 45565 transitions. Word has length 27 [2021-06-05 03:59:49,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:49,935 INFO L482 AbstractCegarLoop]: Abstraction has 12288 states and 45565 transitions. [2021-06-05 03:59:49,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:49,935 INFO L276 IsEmpty]: Start isEmpty. Operand 12288 states and 45565 transitions. [2021-06-05 03:59:49,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:49,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:49,952 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:50,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:50,153 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:50,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:50,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1507837696, now seen corresponding path program 78 times [2021-06-05 03:59:50,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:50,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056782509] [2021-06-05 03:59:50,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:50,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:50,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056782509] [2021-06-05 03:59:50,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056782509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:50,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019631155] [2021-06-05 03:59:50,208 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:50,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 03:59:50,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:50,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:50,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:50,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019631155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:50,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:50,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:50,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110204572] [2021-06-05 03:59:50,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:50,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:50,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:50,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:50,354 INFO L87 Difference]: Start difference. First operand 12288 states and 45565 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:50,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:50,586 INFO L93 Difference]: Finished difference Result 12934 states and 47416 transitions. [2021-06-05 03:59:50,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:50,587 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 27 [2021-06-05 03:59:50,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:50,612 INFO L225 Difference]: With dead ends: 12934 [2021-06-05 03:59:50,612 INFO L226 Difference]: Without dead ends: 12890 [2021-06-05 03:59:50,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12890 states. [2021-06-05 03:59:50,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12890 to 12354. [2021-06-05 03:59:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12354 states, 12353 states have (on average 3.7074394883833888) internal successors, (45798), 12353 states have internal predecessors, (45798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:50,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12354 states to 12354 states and 45798 transitions. [2021-06-05 03:59:50,856 INFO L78 Accepts]: Start accepts. Automaton has 12354 states and 45798 transitions. Word has length 27 [2021-06-05 03:59:50,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:50,857 INFO L482 AbstractCegarLoop]: Abstraction has 12354 states and 45798 transitions. [2021-06-05 03:59:50,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 12354 states and 45798 transitions. [2021-06-05 03:59:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:50,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:50,874 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:51,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:51,077 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:51,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1631076228, now seen corresponding path program 79 times [2021-06-05 03:59:51,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:51,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752714441] [2021-06-05 03:59:51,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:51,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:51,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752714441] [2021-06-05 03:59:51,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752714441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:51,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005979708] [2021-06-05 03:59:51,134 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:51,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:51,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:51,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:51,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005979708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:51,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:51,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:51,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499945240] [2021-06-05 03:59:51,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:51,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:51,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:51,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:51,280 INFO L87 Difference]: Start difference. First operand 12354 states and 45798 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:51,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:51,478 INFO L93 Difference]: Finished difference Result 12785 states and 46949 transitions. [2021-06-05 03:59:51,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:51,478 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 27 [2021-06-05 03:59:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:51,503 INFO L225 Difference]: With dead ends: 12785 [2021-06-05 03:59:51,504 INFO L226 Difference]: Without dead ends: 12687 [2021-06-05 03:59:51,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:51,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12687 states. [2021-06-05 03:59:51,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12687 to 12380. [2021-06-05 03:59:51,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12380 states, 12379 states have (on average 3.7087002181113173) internal successors, (45910), 12379 states have internal predecessors, (45910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:51,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12380 states to 12380 states and 45910 transitions. [2021-06-05 03:59:51,697 INFO L78 Accepts]: Start accepts. Automaton has 12380 states and 45910 transitions. Word has length 27 [2021-06-05 03:59:51,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:51,697 INFO L482 AbstractCegarLoop]: Abstraction has 12380 states and 45910 transitions. [2021-06-05 03:59:51,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:51,697 INFO L276 IsEmpty]: Start isEmpty. Operand 12380 states and 45910 transitions. [2021-06-05 03:59:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:51,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:51,716 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:51,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:51,916 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:51,917 INFO L82 PathProgramCache]: Analyzing trace with hash -179350336, now seen corresponding path program 80 times [2021-06-05 03:59:51,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:51,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394865516] [2021-06-05 03:59:51,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:51,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:51,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:51,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394865516] [2021-06-05 03:59:51,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394865516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:51,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452568056] [2021-06-05 03:59:51,973 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:51,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:51,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:51,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:51,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:52,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452568056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:52,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:52,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:52,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836024132] [2021-06-05 03:59:52,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:52,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:52,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:52,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:52,132 INFO L87 Difference]: Start difference. First operand 12380 states and 45910 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:52,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:52,372 INFO L93 Difference]: Finished difference Result 12574 states and 46469 transitions. [2021-06-05 03:59:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 03:59:52,372 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 27 [2021-06-05 03:59:52,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:52,395 INFO L225 Difference]: With dead ends: 12574 [2021-06-05 03:59:52,395 INFO L226 Difference]: Without dead ends: 12552 [2021-06-05 03:59:52,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:59:52,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12552 states. [2021-06-05 03:59:52,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12552 to 12373. [2021-06-05 03:59:52,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12373 states, 12372 states have (on average 3.7103136113805366) internal successors, (45904), 12372 states have internal predecessors, (45904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12373 states to 12373 states and 45904 transitions. [2021-06-05 03:59:52,581 INFO L78 Accepts]: Start accepts. Automaton has 12373 states and 45904 transitions. Word has length 27 [2021-06-05 03:59:52,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:52,582 INFO L482 AbstractCegarLoop]: Abstraction has 12373 states and 45904 transitions. [2021-06-05 03:59:52,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 12373 states and 45904 transitions. [2021-06-05 03:59:52,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:52,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:52,600 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:52,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 03:59:52,809 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:52,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:52,809 INFO L82 PathProgramCache]: Analyzing trace with hash 887736380, now seen corresponding path program 81 times [2021-06-05 03:59:52,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:52,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625648610] [2021-06-05 03:59:52,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:52,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:52,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:52,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:52,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625648610] [2021-06-05 03:59:52,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625648610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:52,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782601282] [2021-06-05 03:59:52,874 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:52,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 03:59:52,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:52,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:52,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:53,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782601282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:53,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:53,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:53,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782993215] [2021-06-05 03:59:53,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:53,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:53,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:53,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:53,028 INFO L87 Difference]: Start difference. First operand 12373 states and 45904 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:53,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:53,333 INFO L93 Difference]: Finished difference Result 13084 states and 47922 transitions. [2021-06-05 03:59:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:59:53,333 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 27 [2021-06-05 03:59:53,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:53,358 INFO L225 Difference]: With dead ends: 13084 [2021-06-05 03:59:53,359 INFO L226 Difference]: Without dead ends: 13054 [2021-06-05 03:59:53,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:53,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13054 states. [2021-06-05 03:59:53,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13054 to 12469. [2021-06-05 03:59:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12469 states, 12468 states have (on average 3.7080526146936155) internal successors, (46232), 12468 states have internal predecessors, (46232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12469 states to 12469 states and 46232 transitions. [2021-06-05 03:59:53,572 INFO L78 Accepts]: Start accepts. Automaton has 12469 states and 46232 transitions. Word has length 27 [2021-06-05 03:59:53,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:53,572 INFO L482 AbstractCegarLoop]: Abstraction has 12469 states and 46232 transitions. [2021-06-05 03:59:53,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:53,572 INFO L276 IsEmpty]: Start isEmpty. Operand 12469 states and 46232 transitions. [2021-06-05 03:59:53,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:53,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:53,593 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:53,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 03:59:53,794 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:53,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:53,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1977991744, now seen corresponding path program 82 times [2021-06-05 03:59:53,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:53,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552079075] [2021-06-05 03:59:53,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:53,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:53,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552079075] [2021-06-05 03:59:53,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552079075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:53,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862745855] [2021-06-05 03:59:53,858 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:53,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:53,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:53,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:53,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:54,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:54,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862745855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:54,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:54,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:54,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101783111] [2021-06-05 03:59:54,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:54,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:54,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:54,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:54,008 INFO L87 Difference]: Start difference. First operand 12469 states and 46232 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:54,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:54,197 INFO L93 Difference]: Finished difference Result 12896 states and 47434 transitions. [2021-06-05 03:59:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 03:59:54,197 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 27 [2021-06-05 03:59:54,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:54,221 INFO L225 Difference]: With dead ends: 12896 [2021-06-05 03:59:54,221 INFO L226 Difference]: Without dead ends: 12812 [2021-06-05 03:59:54,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12812 states. [2021-06-05 03:59:54,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12812 to 12548. [2021-06-05 03:59:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12548 states, 12547 states have (on average 3.7084562046704392) internal successors, (46530), 12547 states have internal predecessors, (46530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:54,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12548 states to 12548 states and 46530 transitions. [2021-06-05 03:59:54,439 INFO L78 Accepts]: Start accepts. Automaton has 12548 states and 46530 transitions. Word has length 27 [2021-06-05 03:59:54,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:54,439 INFO L482 AbstractCegarLoop]: Abstraction has 12548 states and 46530 transitions. [2021-06-05 03:59:54,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:54,439 INFO L276 IsEmpty]: Start isEmpty. Operand 12548 states and 46530 transitions. [2021-06-05 03:59:54,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:54,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:54,458 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:54,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:54,659 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:54,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:54,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1395187844, now seen corresponding path program 83 times [2021-06-05 03:59:54,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:54,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809324366] [2021-06-05 03:59:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:54,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:54,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809324366] [2021-06-05 03:59:54,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809324366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:54,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448656768] [2021-06-05 03:59:54,718 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:54,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 03:59:54,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:54,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:54,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:54,875 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:54,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448656768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:54,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:54,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:54,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964157301] [2021-06-05 03:59:54,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:54,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:54,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:54,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:54,877 INFO L87 Difference]: Start difference. First operand 12548 states and 46530 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:55,099 INFO L93 Difference]: Finished difference Result 12969 states and 47738 transitions. [2021-06-05 03:59:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:55,099 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 27 [2021-06-05 03:59:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:55,123 INFO L225 Difference]: With dead ends: 12969 [2021-06-05 03:59:55,123 INFO L226 Difference]: Without dead ends: 12939 [2021-06-05 03:59:55,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-05 03:59:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12939 states. [2021-06-05 03:59:55,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12939 to 12565. [2021-06-05 03:59:55,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12565 states, 12564 states have (on average 3.7117160140082777) internal successors, (46634), 12564 states have internal predecessors, (46634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:55,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12565 states to 12565 states and 46634 transitions. [2021-06-05 03:59:55,322 INFO L78 Accepts]: Start accepts. Automaton has 12565 states and 46634 transitions. Word has length 27 [2021-06-05 03:59:55,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:55,322 INFO L482 AbstractCegarLoop]: Abstraction has 12565 states and 46634 transitions. [2021-06-05 03:59:55,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:55,322 INFO L276 IsEmpty]: Start isEmpty. Operand 12565 states and 46634 transitions. [2021-06-05 03:59:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:55,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:55,341 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:55,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:55,542 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:55,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:55,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1958802428, now seen corresponding path program 84 times [2021-06-05 03:59:55,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:55,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562889439] [2021-06-05 03:59:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:55,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:55,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:55,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562889439] [2021-06-05 03:59:55,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562889439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:55,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256349854] [2021-06-05 03:59:55,598 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:55,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 03:59:55,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:55,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:55,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:55,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256349854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:55,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:55,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:55,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241077083] [2021-06-05 03:59:55,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:55,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:55,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:55,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:55,751 INFO L87 Difference]: Start difference. First operand 12565 states and 46634 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:56,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:56,003 INFO L93 Difference]: Finished difference Result 13017 states and 47934 transitions. [2021-06-05 03:59:56,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:56,003 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 27 [2021-06-05 03:59:56,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:56,031 INFO L225 Difference]: With dead ends: 13017 [2021-06-05 03:59:56,031 INFO L226 Difference]: Without dead ends: 12987 [2021-06-05 03:59:56,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:56,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12987 states. [2021-06-05 03:59:56,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12987 to 12637. [2021-06-05 03:59:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12637 states, 12636 states have (on average 3.7109844887622665) internal successors, (46892), 12636 states have internal predecessors, (46892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12637 states to 12637 states and 46892 transitions. [2021-06-05 03:59:56,236 INFO L78 Accepts]: Start accepts. Automaton has 12637 states and 46892 transitions. Word has length 27 [2021-06-05 03:59:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:56,236 INFO L482 AbstractCegarLoop]: Abstraction has 12637 states and 46892 transitions. [2021-06-05 03:59:56,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 12637 states and 46892 transitions. [2021-06-05 03:59:56,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:56,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:56,256 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:56,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:56,457 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:56,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:56,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1037014720, now seen corresponding path program 85 times [2021-06-05 03:59:56,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:56,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744133534] [2021-06-05 03:59:56,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:56,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:56,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744133534] [2021-06-05 03:59:56,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744133534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:56,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438776964] [2021-06-05 03:59:56,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:56,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:56,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:56,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438776964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:56,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:56,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:56,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237836070] [2021-06-05 03:59:56,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:56,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:56,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:56,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:56,656 INFO L87 Difference]: Start difference. First operand 12637 states and 46892 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:56,925 INFO L93 Difference]: Finished difference Result 13031 states and 47962 transitions. [2021-06-05 03:59:56,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 03:59:56,926 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 27 [2021-06-05 03:59:56,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:56,952 INFO L225 Difference]: With dead ends: 13031 [2021-06-05 03:59:56,953 INFO L226 Difference]: Without dead ends: 12951 [2021-06-05 03:59:56,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 03:59:56,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12951 states. [2021-06-05 03:59:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12951 to 12663. [2021-06-05 03:59:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12663 states, 12662 states have (on average 3.7132364555362503) internal successors, (47017), 12662 states have internal predecessors, (47017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:57,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12663 states to 12663 states and 47017 transitions. [2021-06-05 03:59:57,165 INFO L78 Accepts]: Start accepts. Automaton has 12663 states and 47017 transitions. Word has length 27 [2021-06-05 03:59:57,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:57,165 INFO L482 AbstractCegarLoop]: Abstraction has 12663 states and 47017 transitions. [2021-06-05 03:59:57,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand 12663 states and 47017 transitions. [2021-06-05 03:59:57,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 03:59:57,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:57,185 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:57,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:57,385 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:57,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:57,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1052109376, now seen corresponding path program 86 times [2021-06-05 03:59:57,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:57,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812456684] [2021-06-05 03:59:57,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:57,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:57,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812456684] [2021-06-05 03:59:57,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812456684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:57,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091568994] [2021-06-05 03:59:57,454 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:57,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 03:59:57,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:57,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 03:59:57,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 03:59:57,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091568994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:57,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:57,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 03:59:57,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753790087] [2021-06-05 03:59:57,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 03:59:57,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:57,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 03:59:57,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 03:59:57,662 INFO L87 Difference]: Start difference. First operand 12663 states and 47017 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:58,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:58,012 INFO L93 Difference]: Finished difference Result 12828 states and 47506 transitions. [2021-06-05 03:59:58,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 03:59:58,012 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 27 [2021-06-05 03:59:58,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:58,035 INFO L225 Difference]: With dead ends: 12828 [2021-06-05 03:59:58,035 INFO L226 Difference]: Without dead ends: 12813 [2021-06-05 03:59:58,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 243.0ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 03:59:58,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12813 states. [2021-06-05 03:59:58,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12813 to 12651. [2021-06-05 03:59:58,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12651 states, 12650 states have (on average 3.714229249011858) internal successors, (46985), 12650 states have internal predecessors, (46985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:58,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12651 states to 12651 states and 46985 transitions. [2021-06-05 03:59:58,221 INFO L78 Accepts]: Start accepts. Automaton has 12651 states and 46985 transitions. Word has length 27 [2021-06-05 03:59:58,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:58,222 INFO L482 AbstractCegarLoop]: Abstraction has 12651 states and 46985 transitions. [2021-06-05 03:59:58,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:58,222 INFO L276 IsEmpty]: Start isEmpty. Operand 12651 states and 46985 transitions. [2021-06-05 03:59:58,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:59:58,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:58,241 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:58,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:58,442 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:58,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:58,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1489264556, now seen corresponding path program 87 times [2021-06-05 03:59:58,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:58,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975376700] [2021-06-05 03:59:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:58,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:58,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:58,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975376700] [2021-06-05 03:59:58,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975376700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:58,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633719148] [2021-06-05 03:59:58,476 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:58,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 03:59:58,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:58,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:59:58,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 03:59:58,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633719148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:58,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:58,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 03:59:58,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962169498] [2021-06-05 03:59:58,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 03:59:58,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:58,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 03:59:58,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 03:59:58,569 INFO L87 Difference]: Start difference. First operand 12651 states and 46985 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:59,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:59,076 INFO L93 Difference]: Finished difference Result 22245 states and 78518 transitions. [2021-06-05 03:59:59,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 03:59:59,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:59:59,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:59,122 INFO L225 Difference]: With dead ends: 22245 [2021-06-05 03:59:59,122 INFO L226 Difference]: Without dead ends: 22157 [2021-06-05 03:59:59,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 269.8ms TimeCoverageRelationStatistics Valid=386, Invalid=1020, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 03:59:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22157 states. [2021-06-05 03:59:59,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22157 to 13996. [2021-06-05 03:59:59,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13996 states, 13995 states have (on average 3.697463379778492) internal successors, (51746), 13995 states have internal predecessors, (51746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13996 states to 13996 states and 51746 transitions. [2021-06-05 03:59:59,404 INFO L78 Accepts]: Start accepts. Automaton has 13996 states and 51746 transitions. Word has length 29 [2021-06-05 03:59:59,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 03:59:59,404 INFO L482 AbstractCegarLoop]: Abstraction has 13996 states and 51746 transitions. [2021-06-05 03:59:59,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:59,404 INFO L276 IsEmpty]: Start isEmpty. Operand 13996 states and 51746 transitions. [2021-06-05 03:59:59,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 03:59:59,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 03:59:59,426 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 03:59:59,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:59,626 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 03:59:59,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 03:59:59,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1582018668, now seen corresponding path program 88 times [2021-06-05 03:59:59,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 03:59:59,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156328042] [2021-06-05 03:59:59,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 03:59:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 03:59:59,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:59,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 03:59:59,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156328042] [2021-06-05 03:59:59,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156328042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:59,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970130783] [2021-06-05 03:59:59,659 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 03:59:59,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 03:59:59,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 03:59:59,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 03:59:59,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 03:59:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 03:59:59,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970130783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 03:59:59,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 03:59:59,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 03:59:59,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129835129] [2021-06-05 03:59:59,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 03:59:59,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 03:59:59,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 03:59:59,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 03:59:59,754 INFO L87 Difference]: Start difference. First operand 13996 states and 51746 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 03:59:59,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 03:59:59,950 INFO L93 Difference]: Finished difference Result 20503 states and 74398 transitions. [2021-06-05 03:59:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 03:59:59,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 03:59:59,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 03:59:59,988 INFO L225 Difference]: With dead ends: 20503 [2021-06-05 03:59:59,988 INFO L226 Difference]: Without dead ends: 20406 [2021-06-05 03:59:59,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:00:00,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20406 states. [2021-06-05 04:00:00,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20406 to 17863. [2021-06-05 04:00:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17863 states, 17862 states have (on average 3.743141865412608) internal successors, (66860), 17862 states have internal predecessors, (66860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:00,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17863 states to 17863 states and 66860 transitions. [2021-06-05 04:00:00,305 INFO L78 Accepts]: Start accepts. Automaton has 17863 states and 66860 transitions. Word has length 29 [2021-06-05 04:00:00,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:00,305 INFO L482 AbstractCegarLoop]: Abstraction has 17863 states and 66860 transitions. [2021-06-05 04:00:00,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:00,306 INFO L276 IsEmpty]: Start isEmpty. Operand 17863 states and 66860 transitions. [2021-06-05 04:00:00,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:00,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:00,332 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:00,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:00,534 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:00,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:00,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1828893528, now seen corresponding path program 89 times [2021-06-05 04:00:00,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:00,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387462188] [2021-06-05 04:00:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:00:00,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:00,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387462188] [2021-06-05 04:00:00,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387462188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:00,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672546646] [2021-06-05 04:00:00,560 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:00,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:00:00,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:00,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:00,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:00:00,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672546646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:00,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:00,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:00:00,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418392464] [2021-06-05 04:00:00,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:00:00,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:00,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:00:00,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:00:00,631 INFO L87 Difference]: Start difference. First operand 17863 states and 66860 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:01,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:01,283 INFO L93 Difference]: Finished difference Result 41463 states and 150404 transitions. [2021-06-05 04:00:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 04:00:01,283 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:00:01,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:01,572 INFO L225 Difference]: With dead ends: 41463 [2021-06-05 04:00:01,572 INFO L226 Difference]: Without dead ends: 40731 [2021-06-05 04:00:01,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=456, Invalid=1436, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:00:01,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40731 states. [2021-06-05 04:00:02,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40731 to 28028. [2021-06-05 04:00:02,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28028 states, 28027 states have (on average 3.774895636350662) internal successors, (105799), 28027 states have internal predecessors, (105799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28028 states to 28028 states and 105799 transitions. [2021-06-05 04:00:02,246 INFO L78 Accepts]: Start accepts. Automaton has 28028 states and 105799 transitions. Word has length 29 [2021-06-05 04:00:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:02,246 INFO L482 AbstractCegarLoop]: Abstraction has 28028 states and 105799 transitions. [2021-06-05 04:00:02,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 28028 states and 105799 transitions. [2021-06-05 04:00:02,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:02,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:02,301 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:02,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 04:00:02,518 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:02,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:02,518 INFO L82 PathProgramCache]: Analyzing trace with hash 904383528, now seen corresponding path program 90 times [2021-06-05 04:00:02,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:02,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088975650] [2021-06-05 04:00:02,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:02,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:02,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088975650] [2021-06-05 04:00:02,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088975650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:02,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360808309] [2021-06-05 04:00:02,548 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:02,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:00:02,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:02,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:02,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:02,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:02,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360808309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:02,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:02,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 04:00:02,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603296626] [2021-06-05 04:00:02,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:00:02,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:02,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:00:02,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:00:02,645 INFO L87 Difference]: Start difference. First operand 28028 states and 105799 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:03,634 INFO L93 Difference]: Finished difference Result 54693 states and 194613 transitions. [2021-06-05 04:00:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 04:00:03,634 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:00:03,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:03,778 INFO L225 Difference]: With dead ends: 54693 [2021-06-05 04:00:03,778 INFO L226 Difference]: Without dead ends: 54103 [2021-06-05 04:00:03,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 512.2ms TimeCoverageRelationStatistics Valid=805, Invalid=2855, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 04:00:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54103 states. [2021-06-05 04:00:04,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54103 to 31277. [2021-06-05 04:00:04,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31277 states, 31276 states have (on average 3.7364432791917124) internal successors, (116861), 31276 states have internal predecessors, (116861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31277 states to 31277 states and 116861 transitions. [2021-06-05 04:00:04,786 INFO L78 Accepts]: Start accepts. Automaton has 31277 states and 116861 transitions. Word has length 29 [2021-06-05 04:00:04,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:04,786 INFO L482 AbstractCegarLoop]: Abstraction has 31277 states and 116861 transitions. [2021-06-05 04:00:04,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 31277 states and 116861 transitions. [2021-06-05 04:00:04,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:04,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:04,842 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:05,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:05,043 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:05,043 INFO L82 PathProgramCache]: Analyzing trace with hash 816620900, now seen corresponding path program 91 times [2021-06-05 04:00:05,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:05,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144635530] [2021-06-05 04:00:05,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:05,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:05,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144635530] [2021-06-05 04:00:05,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144635530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:05,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310503421] [2021-06-05 04:00:05,072 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:05,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:05,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:05,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310503421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:05,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:05,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2021-06-05 04:00:05,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380229666] [2021-06-05 04:00:05,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:00:05,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:05,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:00:05,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:00:05,150 INFO L87 Difference]: Start difference. First operand 31277 states and 116861 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:05,630 INFO L93 Difference]: Finished difference Result 41400 states and 152146 transitions. [2021-06-05 04:00:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:00:05,630 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:00:05,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:05,723 INFO L225 Difference]: With dead ends: 41400 [2021-06-05 04:00:05,723 INFO L226 Difference]: Without dead ends: 41184 [2021-06-05 04:00:05,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:00:05,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41184 states. [2021-06-05 04:00:06,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41184 to 36746. [2021-06-05 04:00:06,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36746 states, 36745 states have (on average 3.781221934957137) internal successors, (138941), 36745 states have internal predecessors, (138941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:06,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36746 states to 36746 states and 138941 transitions. [2021-06-05 04:00:06,679 INFO L78 Accepts]: Start accepts. Automaton has 36746 states and 138941 transitions. Word has length 29 [2021-06-05 04:00:06,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:06,679 INFO L482 AbstractCegarLoop]: Abstraction has 36746 states and 138941 transitions. [2021-06-05 04:00:06,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:06,679 INFO L276 IsEmpty]: Start isEmpty. Operand 36746 states and 138941 transitions. [2021-06-05 04:00:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:06,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:06,751 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:06,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 04:00:06,952 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:06,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:06,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1324656412, now seen corresponding path program 92 times [2021-06-05 04:00:06,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:06,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407561079] [2021-06-05 04:00:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:06,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:06,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407561079] [2021-06-05 04:00:06,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407561079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:06,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248214129] [2021-06-05 04:00:06,998 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:07,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:00:07,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:07,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:07,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:07,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248214129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:07,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:07,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 04:00:07,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118233860] [2021-06-05 04:00:07,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:00:07,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:07,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:00:07,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:00:07,093 INFO L87 Difference]: Start difference. First operand 36746 states and 138941 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:08,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:08,376 INFO L93 Difference]: Finished difference Result 60231 states and 218468 transitions. [2021-06-05 04:00:08,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 04:00:08,376 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:00:08,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:08,533 INFO L225 Difference]: With dead ends: 60231 [2021-06-05 04:00:08,533 INFO L226 Difference]: Without dead ends: 59842 [2021-06-05 04:00:08,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=780, Invalid=2880, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 04:00:08,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59842 states. [2021-06-05 04:00:09,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59842 to 45321. [2021-06-05 04:00:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45321 states, 45320 states have (on average 3.791306266548985) internal successors, (171822), 45320 states have internal predecessors, (171822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45321 states to 45321 states and 171822 transitions. [2021-06-05 04:00:09,717 INFO L78 Accepts]: Start accepts. Automaton has 45321 states and 171822 transitions. Word has length 29 [2021-06-05 04:00:09,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:09,717 INFO L482 AbstractCegarLoop]: Abstraction has 45321 states and 171822 transitions. [2021-06-05 04:00:09,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:09,717 INFO L276 IsEmpty]: Start isEmpty. Operand 45321 states and 171822 transitions. [2021-06-05 04:00:09,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:09,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:09,805 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:10,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:10,005 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:10,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:10,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1852635552, now seen corresponding path program 93 times [2021-06-05 04:00:10,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:10,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523041723] [2021-06-05 04:00:10,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:10,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:10,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523041723] [2021-06-05 04:00:10,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523041723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:10,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122698548] [2021-06-05 04:00:10,028 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:10,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:00:10,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:10,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:10,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:10,239 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 04:00:10,300 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:10,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122698548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:10,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:10,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 04:00:10,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675111174] [2021-06-05 04:00:10,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:00:10,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:10,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:00:10,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:00:10,301 INFO L87 Difference]: Start difference. First operand 45321 states and 171822 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:11,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:11,320 INFO L93 Difference]: Finished difference Result 61448 states and 220290 transitions. [2021-06-05 04:00:11,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 04:00:11,320 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:00:11,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:11,492 INFO L225 Difference]: With dead ends: 61448 [2021-06-05 04:00:11,492 INFO L226 Difference]: Without dead ends: 61268 [2021-06-05 04:00:11,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 483.4ms TimeCoverageRelationStatistics Valid=767, Invalid=2893, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 04:00:11,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61268 states. [2021-06-05 04:00:12,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61268 to 46515. [2021-06-05 04:00:12,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46515 states, 46514 states have (on average 3.783893021455906) internal successors, (176004), 46514 states have internal predecessors, (176004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:12,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46515 states to 46515 states and 176004 transitions. [2021-06-05 04:00:12,963 INFO L78 Accepts]: Start accepts. Automaton has 46515 states and 176004 transitions. Word has length 29 [2021-06-05 04:00:12,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:12,963 INFO L482 AbstractCegarLoop]: Abstraction has 46515 states and 176004 transitions. [2021-06-05 04:00:12,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:12,963 INFO L276 IsEmpty]: Start isEmpty. Operand 46515 states and 176004 transitions. [2021-06-05 04:00:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:13,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:13,034 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:13,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 04:00:13,235 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:13,235 INFO L82 PathProgramCache]: Analyzing trace with hash -505873000, now seen corresponding path program 94 times [2021-06-05 04:00:13,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:13,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510284911] [2021-06-05 04:00:13,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:13,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:13,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510284911] [2021-06-05 04:00:13,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510284911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:13,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715073567] [2021-06-05 04:00:13,254 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:13,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:00:13,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:13,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:13,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:13,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 04:00:13,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715073567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:13,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:13,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 04:00:13,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755492463] [2021-06-05 04:00:13,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:00:13,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:13,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:00:13,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:00:13,509 INFO L87 Difference]: Start difference. First operand 46515 states and 176004 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:13,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:13,860 INFO L93 Difference]: Finished difference Result 58737 states and 220575 transitions. [2021-06-05 04:00:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:00:13,861 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:00:13,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:14,042 INFO L225 Difference]: With dead ends: 58737 [2021-06-05 04:00:14,042 INFO L226 Difference]: Without dead ends: 58715 [2021-06-05 04:00:14,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 26.2ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:00:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58715 states. [2021-06-05 04:00:15,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58715 to 54562. [2021-06-05 04:00:15,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54562 states, 54561 states have (on average 3.806143582412346) internal successors, (207667), 54561 states have internal predecessors, (207667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:15,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54562 states to 54562 states and 207667 transitions. [2021-06-05 04:00:15,857 INFO L78 Accepts]: Start accepts. Automaton has 54562 states and 207667 transitions. Word has length 29 [2021-06-05 04:00:15,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:15,858 INFO L482 AbstractCegarLoop]: Abstraction has 54562 states and 207667 transitions. [2021-06-05 04:00:15,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:15,858 INFO L276 IsEmpty]: Start isEmpty. Operand 54562 states and 207667 transitions. [2021-06-05 04:00:15,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:15,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:15,988 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:16,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 04:00:16,189 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:16,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:16,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2054404452, now seen corresponding path program 95 times [2021-06-05 04:00:16,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:16,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023932765] [2021-06-05 04:00:16,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:16,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:16,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023932765] [2021-06-05 04:00:16,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023932765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:16,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395080100] [2021-06-05 04:00:16,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:16,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:00:16,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:16,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:16,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:16,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:16,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395080100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:16,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:16,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 04:00:16,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801705381] [2021-06-05 04:00:16,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:00:16,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:16,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:00:16,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:00:16,304 INFO L87 Difference]: Start difference. First operand 54562 states and 207667 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:17,759 INFO L93 Difference]: Finished difference Result 79748 states and 284600 transitions. [2021-06-05 04:00:17,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 04:00:17,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:00:17,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:17,965 INFO L225 Difference]: With dead ends: 79748 [2021-06-05 04:00:17,965 INFO L226 Difference]: Without dead ends: 79619 [2021-06-05 04:00:17,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 683.3ms TimeCoverageRelationStatistics Valid=1227, Invalid=5093, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 04:00:18,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79619 states. [2021-06-05 04:00:19,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79619 to 55774. [2021-06-05 04:00:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55774 states, 55773 states have (on average 3.7706954978215266) internal successors, (210303), 55773 states have internal predecessors, (210303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55774 states to 55774 states and 210303 transitions. [2021-06-05 04:00:19,907 INFO L78 Accepts]: Start accepts. Automaton has 55774 states and 210303 transitions. Word has length 29 [2021-06-05 04:00:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:19,907 INFO L482 AbstractCegarLoop]: Abstraction has 55774 states and 210303 transitions. [2021-06-05 04:00:19,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:19,907 INFO L276 IsEmpty]: Start isEmpty. Operand 55774 states and 210303 transitions. [2021-06-05 04:00:20,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:20,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:20,005 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:20,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 04:00:20,215 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:20,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:20,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1716737040, now seen corresponding path program 96 times [2021-06-05 04:00:20,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:20,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437790] [2021-06-05 04:00:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:20,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:20,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437790] [2021-06-05 04:00:20,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:20,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858465201] [2021-06-05 04:00:20,263 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:20,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:00:20,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:20,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:20,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:20,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858465201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:20,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:20,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2021-06-05 04:00:20,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638815111] [2021-06-05 04:00:20,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:00:20,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:20,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:00:20,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:00:20,353 INFO L87 Difference]: Start difference. First operand 55774 states and 210303 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:21,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:21,017 INFO L93 Difference]: Finished difference Result 60437 states and 224551 transitions. [2021-06-05 04:00:21,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:00:21,021 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:00:21,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:21,207 INFO L225 Difference]: With dead ends: 60437 [2021-06-05 04:00:21,207 INFO L226 Difference]: Without dead ends: 60405 [2021-06-05 04:00:21,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:00:21,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60405 states. [2021-06-05 04:00:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60405 to 49962. [2021-06-05 04:00:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49962 states, 49961 states have (on average 3.74323972698705) internal successors, (187016), 49961 states have internal predecessors, (187016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49962 states to 49962 states and 187016 transitions. [2021-06-05 04:00:22,832 INFO L78 Accepts]: Start accepts. Automaton has 49962 states and 187016 transitions. Word has length 29 [2021-06-05 04:00:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:22,832 INFO L482 AbstractCegarLoop]: Abstraction has 49962 states and 187016 transitions. [2021-06-05 04:00:22,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:22,832 INFO L276 IsEmpty]: Start isEmpty. Operand 49962 states and 187016 transitions. [2021-06-05 04:00:22,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:22,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:22,930 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:23,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:23,131 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:23,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:23,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1220322522, now seen corresponding path program 97 times [2021-06-05 04:00:23,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:23,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113765123] [2021-06-05 04:00:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:23,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:23,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113765123] [2021-06-05 04:00:23,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113765123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:23,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277022119] [2021-06-05 04:00:23,156 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:23,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:23,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:23,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:23,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277022119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:23,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:23,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 04:00:23,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128633634] [2021-06-05 04:00:23,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:00:23,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:23,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:00:23,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:00:23,221 INFO L87 Difference]: Start difference. First operand 49962 states and 187016 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:23,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:23,661 INFO L93 Difference]: Finished difference Result 60595 states and 223581 transitions. [2021-06-05 04:00:23,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:00:23,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:00:23,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:23,853 INFO L225 Difference]: With dead ends: 60595 [2021-06-05 04:00:23,853 INFO L226 Difference]: Without dead ends: 60532 [2021-06-05 04:00:23,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:00:23,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60532 states. [2021-06-05 04:00:25,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60532 to 55220. [2021-06-05 04:00:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55220 states, 55219 states have (on average 3.765171408392039) internal successors, (207909), 55219 states have internal predecessors, (207909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55220 states to 55220 states and 207909 transitions. [2021-06-05 04:00:25,503 INFO L78 Accepts]: Start accepts. Automaton has 55220 states and 207909 transitions. Word has length 29 [2021-06-05 04:00:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:25,503 INFO L482 AbstractCegarLoop]: Abstraction has 55220 states and 207909 transitions. [2021-06-05 04:00:25,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:25,503 INFO L276 IsEmpty]: Start isEmpty. Operand 55220 states and 207909 transitions. [2021-06-05 04:00:25,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:25,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:25,591 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:25,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 04:00:25,793 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:25,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:25,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1949620774, now seen corresponding path program 98 times [2021-06-05 04:00:25,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:25,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583798800] [2021-06-05 04:00:25,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:25,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:25,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583798800] [2021-06-05 04:00:25,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583798800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:25,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980814797] [2021-06-05 04:00:25,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:25,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:00:25,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:25,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:25,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:25,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980814797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:25,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:25,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 04:00:25,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953170212] [2021-06-05 04:00:25,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:00:25,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:25,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:00:25,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:00:25,892 INFO L87 Difference]: Start difference. First operand 55220 states and 207909 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:26,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:26,850 INFO L93 Difference]: Finished difference Result 66898 states and 242065 transitions. [2021-06-05 04:00:26,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 04:00:26,851 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 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 29 [2021-06-05 04:00:26,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:27,269 INFO L225 Difference]: With dead ends: 66898 [2021-06-05 04:00:27,269 INFO L226 Difference]: Without dead ends: 66524 [2021-06-05 04:00:27,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 405.4ms TimeCoverageRelationStatistics Valid=684, Invalid=2738, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 04:00:27,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66524 states. [2021-06-05 04:00:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66524 to 50787. [2021-06-05 04:00:28,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50787 states, 50786 states have (on average 3.7521167250817156) internal successors, (190555), 50786 states have internal predecessors, (190555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:28,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50787 states to 50787 states and 190555 transitions. [2021-06-05 04:00:28,637 INFO L78 Accepts]: Start accepts. Automaton has 50787 states and 190555 transitions. Word has length 29 [2021-06-05 04:00:28,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:28,637 INFO L482 AbstractCegarLoop]: Abstraction has 50787 states and 190555 transitions. [2021-06-05 04:00:28,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:28,637 INFO L276 IsEmpty]: Start isEmpty. Operand 50787 states and 190555 transitions. [2021-06-05 04:00:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:28,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:28,728 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:28,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:28,928 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:28,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:28,929 INFO L82 PathProgramCache]: Analyzing trace with hash -315726062, now seen corresponding path program 99 times [2021-06-05 04:00:28,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:28,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655188548] [2021-06-05 04:00:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:28,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:28,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655188548] [2021-06-05 04:00:28,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655188548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:28,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794131802] [2021-06-05 04:00:28,960 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:28,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:00:28,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:28,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:28,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 04:00:29,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794131802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:29,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:29,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 04:00:29,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127360968] [2021-06-05 04:00:29,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:00:29,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:29,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:00:29,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:00:29,056 INFO L87 Difference]: Start difference. First operand 50787 states and 190555 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:30,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:30,440 INFO L93 Difference]: Finished difference Result 100609 states and 369514 transitions. [2021-06-05 04:00:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 04:00:30,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:00:30,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:30,755 INFO L225 Difference]: With dead ends: 100609 [2021-06-05 04:00:30,756 INFO L226 Difference]: Without dead ends: 100210 [2021-06-05 04:00:30,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=657, Invalid=2205, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 04:00:30,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100210 states. [2021-06-05 04:00:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100210 to 73794. [2021-06-05 04:00:32,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73794 states, 73793 states have (on average 3.8082744975810714) internal successors, (281024), 73793 states have internal predecessors, (281024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:33,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73794 states to 73794 states and 281024 transitions. [2021-06-05 04:00:33,058 INFO L78 Accepts]: Start accepts. Automaton has 73794 states and 281024 transitions. Word has length 29 [2021-06-05 04:00:33,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:33,058 INFO L482 AbstractCegarLoop]: Abstraction has 73794 states and 281024 transitions. [2021-06-05 04:00:33,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:33,058 INFO L276 IsEmpty]: Start isEmpty. Operand 73794 states and 281024 transitions. [2021-06-05 04:00:33,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:33,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:33,191 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:33,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 04:00:33,395 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:33,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:33,395 INFO L82 PathProgramCache]: Analyzing trace with hash 471519794, now seen corresponding path program 100 times [2021-06-05 04:00:33,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:33,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851361011] [2021-06-05 04:00:33,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:33,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:33,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851361011] [2021-06-05 04:00:33,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851361011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:33,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124691518] [2021-06-05 04:00:33,425 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:33,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:00:33,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:33,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:33,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:33,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124691518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:33,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:33,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 04:00:33,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311754986] [2021-06-05 04:00:33,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:00:33,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:33,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:00:33,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:00:33,523 INFO L87 Difference]: Start difference. First operand 73794 states and 281024 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:35,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:35,203 INFO L93 Difference]: Finished difference Result 102298 states and 373018 transitions. [2021-06-05 04:00:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 04:00:35,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 29 [2021-06-05 04:00:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:35,547 INFO L225 Difference]: With dead ends: 102298 [2021-06-05 04:00:35,547 INFO L226 Difference]: Without dead ends: 101158 [2021-06-05 04:00:35,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 525.5ms TimeCoverageRelationStatistics Valid=821, Invalid=2961, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 04:00:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101158 states. [2021-06-05 04:00:37,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101158 to 73287. [2021-06-05 04:00:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73287 states, 73286 states have (on average 3.7827825232650163) internal successors, (277225), 73286 states have internal predecessors, (277225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:38,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73287 states to 73287 states and 277225 transitions. [2021-06-05 04:00:38,057 INFO L78 Accepts]: Start accepts. Automaton has 73287 states and 277225 transitions. Word has length 29 [2021-06-05 04:00:38,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:38,057 INFO L482 AbstractCegarLoop]: Abstraction has 73287 states and 277225 transitions. [2021-06-05 04:00:38,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:38,057 INFO L276 IsEmpty]: Start isEmpty. Operand 73287 states and 277225 transitions. [2021-06-05 04:00:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:38,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:38,182 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:38,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:38,383 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:38,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:38,383 INFO L82 PathProgramCache]: Analyzing trace with hash 353639198, now seen corresponding path program 101 times [2021-06-05 04:00:38,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:38,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348278132] [2021-06-05 04:00:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:38,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:38,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:38,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348278132] [2021-06-05 04:00:38,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348278132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:38,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289502689] [2021-06-05 04:00:38,419 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:38,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:00:38,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:38,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:38,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:38,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289502689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:38,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:38,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 04:00:38,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755156815] [2021-06-05 04:00:38,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:00:38,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:38,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:00:38,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:00:38,486 INFO L87 Difference]: Start difference. First operand 73287 states and 277225 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:39,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:39,252 INFO L93 Difference]: Finished difference Result 82707 states and 304326 transitions. [2021-06-05 04:00:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:00:39,253 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:00:39,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:39,504 INFO L225 Difference]: With dead ends: 82707 [2021-06-05 04:00:39,504 INFO L226 Difference]: Without dead ends: 82617 [2021-06-05 04:00:39,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:00:39,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82617 states. [2021-06-05 04:00:41,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82617 to 73144. [2021-06-05 04:00:41,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73144 states, 73143 states have (on average 3.754234855010049) internal successors, (274596), 73143 states have internal predecessors, (274596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:41,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73144 states to 73144 states and 274596 transitions. [2021-06-05 04:00:41,684 INFO L78 Accepts]: Start accepts. Automaton has 73144 states and 274596 transitions. Word has length 29 [2021-06-05 04:00:41,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:41,693 INFO L482 AbstractCegarLoop]: Abstraction has 73144 states and 274596 transitions. [2021-06-05 04:00:41,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:41,693 INFO L276 IsEmpty]: Start isEmpty. Operand 73144 states and 274596 transitions. [2021-06-05 04:00:41,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:41,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:41,821 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:42,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:42,021 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:42,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:42,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1372869486, now seen corresponding path program 102 times [2021-06-05 04:00:42,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:42,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296400723] [2021-06-05 04:00:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:42,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:42,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296400723] [2021-06-05 04:00:42,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296400723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:42,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161360624] [2021-06-05 04:00:42,048 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:42,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:00:42,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:42,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:42,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:00:42,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161360624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:42,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:42,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 04:00:42,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997170250] [2021-06-05 04:00:42,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:00:42,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:42,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:00:42,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:00:42,128 INFO L87 Difference]: Start difference. First operand 73144 states and 274596 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:43,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:43,357 INFO L93 Difference]: Finished difference Result 90454 states and 327992 transitions. [2021-06-05 04:00:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 04:00:43,357 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 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 29 [2021-06-05 04:00:43,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:43,955 INFO L225 Difference]: With dead ends: 90454 [2021-06-05 04:00:43,956 INFO L226 Difference]: Without dead ends: 89724 [2021-06-05 04:00:43,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1695 ImplicationChecksByTransitivity, 544.5ms TimeCoverageRelationStatistics Valid=908, Invalid=3784, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 04:00:44,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89724 states. [2021-06-05 04:00:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89724 to 72523. [2021-06-05 04:00:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72523 states, 72522 states have (on average 3.7569427208295414) internal successors, (272461), 72522 states have internal predecessors, (272461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72523 states to 72523 states and 272461 transitions. [2021-06-05 04:00:45,596 INFO L78 Accepts]: Start accepts. Automaton has 72523 states and 272461 transitions. Word has length 29 [2021-06-05 04:00:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:45,596 INFO L482 AbstractCegarLoop]: Abstraction has 72523 states and 272461 transitions. [2021-06-05 04:00:45,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:45,596 INFO L276 IsEmpty]: Start isEmpty. Operand 72523 states and 272461 transitions. [2021-06-05 04:00:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:45,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:45,723 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:45,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-06-05 04:00:45,923 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:45,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:45,924 INFO L82 PathProgramCache]: Analyzing trace with hash 351112822, now seen corresponding path program 103 times [2021-06-05 04:00:45,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:45,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660736502] [2021-06-05 04:00:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:45,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:45,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660736502] [2021-06-05 04:00:45,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660736502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:45,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895326469] [2021-06-05 04:00:45,942 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:45,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:45,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:46,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895326469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:46,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:46,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 04:00:46,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786851822] [2021-06-05 04:00:46,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:00:46,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:46,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:00:46,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:00:46,007 INFO L87 Difference]: Start difference. First operand 72523 states and 272461 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:46,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:46,885 INFO L93 Difference]: Finished difference Result 85882 states and 320374 transitions. [2021-06-05 04:00:46,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:00:46,886 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:00:46,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:47,141 INFO L225 Difference]: With dead ends: 85882 [2021-06-05 04:00:47,142 INFO L226 Difference]: Without dead ends: 85852 [2021-06-05 04:00:47,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:00:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85852 states. [2021-06-05 04:00:48,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85852 to 81497. [2021-06-05 04:00:48,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81497 states, 81496 states have (on average 3.7722342200844214) internal successors, (307422), 81496 states have internal predecessors, (307422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81497 states to 81497 states and 307422 transitions. [2021-06-05 04:00:49,073 INFO L78 Accepts]: Start accepts. Automaton has 81497 states and 307422 transitions. Word has length 29 [2021-06-05 04:00:49,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:49,073 INFO L482 AbstractCegarLoop]: Abstraction has 81497 states and 307422 transitions. [2021-06-05 04:00:49,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:49,073 INFO L276 IsEmpty]: Start isEmpty. Operand 81497 states and 307422 transitions. [2021-06-05 04:00:49,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:49,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:49,619 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:49,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 04:00:49,819 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:49,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:49,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1495713142, now seen corresponding path program 104 times [2021-06-05 04:00:49,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:49,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55601049] [2021-06-05 04:00:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:49,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:49,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55601049] [2021-06-05 04:00:49,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55601049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:49,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001853646] [2021-06-05 04:00:49,842 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:49,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:00:49,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:49,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:49,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:49,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001853646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:49,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:49,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 04:00:49,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833167144] [2021-06-05 04:00:49,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:00:49,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:49,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:00:49,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:00:49,905 INFO L87 Difference]: Start difference. First operand 81497 states and 307422 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:50,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:50,381 INFO L93 Difference]: Finished difference Result 90964 states and 338142 transitions. [2021-06-05 04:00:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:00:50,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:00:50,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:50,647 INFO L225 Difference]: With dead ends: 90964 [2021-06-05 04:00:50,647 INFO L226 Difference]: Without dead ends: 90951 [2021-06-05 04:00:50,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:00:50,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90951 states. [2021-06-05 04:00:52,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90951 to 81689. [2021-06-05 04:00:52,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81689 states, 81688 states have (on average 3.771067965919107) internal successors, (308051), 81688 states have internal predecessors, (308051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81689 states to 81689 states and 308051 transitions. [2021-06-05 04:00:52,887 INFO L78 Accepts]: Start accepts. Automaton has 81689 states and 308051 transitions. Word has length 29 [2021-06-05 04:00:52,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:52,887 INFO L482 AbstractCegarLoop]: Abstraction has 81689 states and 308051 transitions. [2021-06-05 04:00:52,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:52,887 INFO L276 IsEmpty]: Start isEmpty. Operand 81689 states and 308051 transitions. [2021-06-05 04:00:53,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:53,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:53,038 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:53,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:53,238 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:53,239 INFO L82 PathProgramCache]: Analyzing trace with hash 22394150, now seen corresponding path program 105 times [2021-06-05 04:00:53,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:53,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750125347] [2021-06-05 04:00:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:53,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:53,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750125347] [2021-06-05 04:00:53,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750125347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:53,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447124991] [2021-06-05 04:00:53,261 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:53,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:00:53,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:53,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:53,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:00:53,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447124991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:53,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:53,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 04:00:53,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272134030] [2021-06-05 04:00:53,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:00:53,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:53,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:00:53,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:00:53,347 INFO L87 Difference]: Start difference. First operand 81689 states and 308051 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:55,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:55,008 INFO L93 Difference]: Finished difference Result 117029 states and 423344 transitions. [2021-06-05 04:00:55,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 04:00:55,009 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:00:55,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:55,385 INFO L225 Difference]: With dead ends: 117029 [2021-06-05 04:00:55,385 INFO L226 Difference]: Without dead ends: 116821 [2021-06-05 04:00:55,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 555.7ms TimeCoverageRelationStatistics Valid=957, Invalid=3873, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 04:00:55,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116821 states. [2021-06-05 04:00:57,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116821 to 82052. [2021-06-05 04:00:57,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82052 states, 82051 states have (on average 3.7600882378033176) internal successors, (308519), 82051 states have internal predecessors, (308519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82052 states to 82052 states and 308519 transitions. [2021-06-05 04:00:58,027 INFO L78 Accepts]: Start accepts. Automaton has 82052 states and 308519 transitions. Word has length 29 [2021-06-05 04:00:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:00:58,028 INFO L482 AbstractCegarLoop]: Abstraction has 82052 states and 308519 transitions. [2021-06-05 04:00:58,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:58,028 INFO L276 IsEmpty]: Start isEmpty. Operand 82052 states and 308519 transitions. [2021-06-05 04:00:58,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:00:58,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:00:58,165 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:00:58,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 04:00:58,373 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:00:58,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:00:58,373 INFO L82 PathProgramCache]: Analyzing trace with hash 954640786, now seen corresponding path program 106 times [2021-06-05 04:00:58,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:00:58,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31833803] [2021-06-05 04:00:58,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:00:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:00:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:00:58,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:00:58,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31833803] [2021-06-05 04:00:58,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31833803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:58,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084410133] [2021-06-05 04:00:58,412 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:00:58,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:00:58,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:00:58,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:00:58,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:00:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:00:58,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084410133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:00:58,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:00:58,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-06-05 04:00:58,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21776060] [2021-06-05 04:00:58,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:00:58,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:00:58,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:00:58,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:00:58,481 INFO L87 Difference]: Start difference. First operand 82052 states and 308519 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:00:58,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:00:58,995 INFO L93 Difference]: Finished difference Result 86807 states and 321949 transitions. [2021-06-05 04:00:58,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:00:58,996 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:00:58,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:00:59,252 INFO L225 Difference]: With dead ends: 86807 [2021-06-05 04:00:59,252 INFO L226 Difference]: Without dead ends: 86624 [2021-06-05 04:00:59,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:00:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86624 states. [2021-06-05 04:01:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86624 to 81742. [2021-06-05 04:01:01,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81742 states, 81741 states have (on average 3.760120380225346) internal successors, (307356), 81741 states have internal predecessors, (307356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:01,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81742 states to 81742 states and 307356 transitions. [2021-06-05 04:01:01,440 INFO L78 Accepts]: Start accepts. Automaton has 81742 states and 307356 transitions. Word has length 29 [2021-06-05 04:01:01,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:01,440 INFO L482 AbstractCegarLoop]: Abstraction has 81742 states and 307356 transitions. [2021-06-05 04:01:01,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:01,440 INFO L276 IsEmpty]: Start isEmpty. Operand 81742 states and 307356 transitions. [2021-06-05 04:01:01,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:01:01,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:01,583 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:01,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 04:01:01,791 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:01,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:01,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1306191286, now seen corresponding path program 107 times [2021-06-05 04:01:01,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:01,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696177964] [2021-06-05 04:01:01,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:01,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:01,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696177964] [2021-06-05 04:01:01,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696177964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:01,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039502914] [2021-06-05 04:01:01,835 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:01,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:01:01,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:01,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:01:01,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:01,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039502914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:01,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:01,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-06-05 04:01:01,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315612672] [2021-06-05 04:01:01,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:01:01,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:01,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:01:01,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:01:01,917 INFO L87 Difference]: Start difference. First operand 81742 states and 307356 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:02,974 INFO L93 Difference]: Finished difference Result 105120 states and 389933 transitions. [2021-06-05 04:01:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:01:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:01:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:03,294 INFO L225 Difference]: With dead ends: 105120 [2021-06-05 04:01:03,294 INFO L226 Difference]: Without dead ends: 104966 [2021-06-05 04:01:03,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:01:03,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104966 states. [2021-06-05 04:01:05,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104966 to 90971. [2021-06-05 04:01:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90971 states, 90970 states have (on average 3.763823238430252) internal successors, (342395), 90970 states have internal predecessors, (342395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:05,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90971 states to 90971 states and 342395 transitions. [2021-06-05 04:01:05,884 INFO L78 Accepts]: Start accepts. Automaton has 90971 states and 342395 transitions. Word has length 29 [2021-06-05 04:01:05,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:05,884 INFO L482 AbstractCegarLoop]: Abstraction has 90971 states and 342395 transitions. [2021-06-05 04:01:05,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:05,884 INFO L276 IsEmpty]: Start isEmpty. Operand 90971 states and 342395 transitions. [2021-06-05 04:01:06,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:01:06,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:06,052 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:06,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 04:01:06,253 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:06,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:06,253 INFO L82 PathProgramCache]: Analyzing trace with hash -136054070, now seen corresponding path program 108 times [2021-06-05 04:01:06,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:06,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026242983] [2021-06-05 04:01:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:06,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:06,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026242983] [2021-06-05 04:01:06,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026242983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:06,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621881015] [2021-06-05 04:01:06,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:06,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:01:06,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:06,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:01:06,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:01:06,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621881015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:06,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:06,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-06-05 04:01:06,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465673564] [2021-06-05 04:01:06,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:01:06,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:06,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:01:06,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:01:06,387 INFO L87 Difference]: Start difference. First operand 90971 states and 342395 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:08,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:08,211 INFO L93 Difference]: Finished difference Result 124333 states and 441738 transitions. [2021-06-05 04:01:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 04:01:08,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:01:08,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:08,578 INFO L225 Difference]: With dead ends: 124333 [2021-06-05 04:01:08,578 INFO L226 Difference]: Without dead ends: 124126 [2021-06-05 04:01:08,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 658.8ms TimeCoverageRelationStatistics Valid=1215, Invalid=4335, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 04:01:08,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124126 states. [2021-06-05 04:01:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124126 to 81617. [2021-06-05 04:01:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81617 states, 81616 states have (on average 3.7307023132719075) internal successors, (304485), 81616 states have internal predecessors, (304485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:11,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81617 states to 81617 states and 304485 transitions. [2021-06-05 04:01:11,149 INFO L78 Accepts]: Start accepts. Automaton has 81617 states and 304485 transitions. Word has length 29 [2021-06-05 04:01:11,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:11,149 INFO L482 AbstractCegarLoop]: Abstraction has 81617 states and 304485 transitions. [2021-06-05 04:01:11,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:11,149 INFO L276 IsEmpty]: Start isEmpty. Operand 81617 states and 304485 transitions. [2021-06-05 04:01:11,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:01:11,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:11,289 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:11,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:11,490 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:11,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:11,491 INFO L82 PathProgramCache]: Analyzing trace with hash 2042862942, now seen corresponding path program 109 times [2021-06-05 04:01:11,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:11,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802344883] [2021-06-05 04:01:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:11,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:11,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:11,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802344883] [2021-06-05 04:01:11,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802344883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:11,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509499825] [2021-06-05 04:01:11,542 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:11,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:01:11,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:11,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509499825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:11,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:11,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-06-05 04:01:11,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649825240] [2021-06-05 04:01:11,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:01:11,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:11,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:01:11,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:01:11,602 INFO L87 Difference]: Start difference. First operand 81617 states and 304485 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:12,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:12,185 INFO L93 Difference]: Finished difference Result 104858 states and 384069 transitions. [2021-06-05 04:01:12,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:01:12,185 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:01:12,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:12,503 INFO L225 Difference]: With dead ends: 104858 [2021-06-05 04:01:12,503 INFO L226 Difference]: Without dead ends: 104830 [2021-06-05 04:01:12,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:01:13,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104830 states. [2021-06-05 04:01:14,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104830 to 80598. [2021-06-05 04:01:14,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80598 states, 80597 states have (on average 3.718897725721801) internal successors, (299732), 80597 states have internal predecessors, (299732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:14,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80598 states to 80598 states and 299732 transitions. [2021-06-05 04:01:14,800 INFO L78 Accepts]: Start accepts. Automaton has 80598 states and 299732 transitions. Word has length 29 [2021-06-05 04:01:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:14,800 INFO L482 AbstractCegarLoop]: Abstraction has 80598 states and 299732 transitions. [2021-06-05 04:01:14,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:14,800 INFO L276 IsEmpty]: Start isEmpty. Operand 80598 states and 299732 transitions. [2021-06-05 04:01:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:01:14,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:14,944 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:15,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 04:01:15,145 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:15,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:15,146 INFO L82 PathProgramCache]: Analyzing trace with hash 99679966, now seen corresponding path program 110 times [2021-06-05 04:01:15,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:15,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99436556] [2021-06-05 04:01:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:15,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:15,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99436556] [2021-06-05 04:01:15,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99436556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:15,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143422080] [2021-06-05 04:01:15,173 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:15,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:01:15,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:15,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:01:15,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 04:01:15,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143422080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:15,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:15,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 04:01:15,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976861933] [2021-06-05 04:01:15,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:01:15,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:15,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:01:15,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:01:15,251 INFO L87 Difference]: Start difference. First operand 80598 states and 299732 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:17,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:17,210 INFO L93 Difference]: Finished difference Result 120372 states and 431223 transitions. [2021-06-05 04:01:17,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 04:01:17,210 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:01:17,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:17,598 INFO L225 Difference]: With dead ends: 120372 [2021-06-05 04:01:17,598 INFO L226 Difference]: Without dead ends: 120022 [2021-06-05 04:01:17,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 403.3ms TimeCoverageRelationStatistics Valid=699, Invalid=2493, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 04:01:17,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120022 states. [2021-06-05 04:01:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120022 to 96150. [2021-06-05 04:01:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96150 states, 96149 states have (on average 3.740330112637677) internal successors, (359629), 96149 states have internal predecessors, (359629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96150 states to 96150 states and 359629 transitions. [2021-06-05 04:01:20,368 INFO L78 Accepts]: Start accepts. Automaton has 96150 states and 359629 transitions. Word has length 29 [2021-06-05 04:01:20,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:20,368 INFO L482 AbstractCegarLoop]: Abstraction has 96150 states and 359629 transitions. [2021-06-05 04:01:20,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:20,368 INFO L276 IsEmpty]: Start isEmpty. Operand 96150 states and 359629 transitions. [2021-06-05 04:01:20,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:01:20,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:20,530 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:20,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 04:01:20,739 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:20,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:20,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1163429594, now seen corresponding path program 111 times [2021-06-05 04:01:20,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:20,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347218093] [2021-06-05 04:01:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:20,766 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:20,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:20,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347218093] [2021-06-05 04:01:20,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347218093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:20,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277873333] [2021-06-05 04:01:20,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:20,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:01:20,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:20,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:01:20,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 04:01:20,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277873333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:20,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:20,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 11 [2021-06-05 04:01:20,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259144966] [2021-06-05 04:01:20,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:01:20,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:20,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:01:20,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:01:20,848 INFO L87 Difference]: Start difference. First operand 96150 states and 359629 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:22,694 INFO L93 Difference]: Finished difference Result 158751 states and 577161 transitions. [2021-06-05 04:01:22,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 04:01:22,695 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:01:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:23,159 INFO L225 Difference]: With dead ends: 158751 [2021-06-05 04:01:23,159 INFO L226 Difference]: Without dead ends: 157945 [2021-06-05 04:01:23,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 450.8ms TimeCoverageRelationStatistics Valid=781, Invalid=2641, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 04:01:23,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157945 states. [2021-06-05 04:01:25,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157945 to 113836. [2021-06-05 04:01:25,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113836 states, 113835 states have (on average 3.7557693152369658) internal successors, (427538), 113835 states have internal predecessors, (427538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113836 states to 113836 states and 427538 transitions. [2021-06-05 04:01:26,366 INFO L78 Accepts]: Start accepts. Automaton has 113836 states and 427538 transitions. Word has length 29 [2021-06-05 04:01:26,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:26,366 INFO L482 AbstractCegarLoop]: Abstraction has 113836 states and 427538 transitions. [2021-06-05 04:01:26,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:26,366 INFO L276 IsEmpty]: Start isEmpty. Operand 113836 states and 427538 transitions. [2021-06-05 04:01:26,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:01:26,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:26,549 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:26,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:26,749 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:26,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:26,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1318670174, now seen corresponding path program 112 times [2021-06-05 04:01:26,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:26,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792305839] [2021-06-05 04:01:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:26,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:26,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792305839] [2021-06-05 04:01:26,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792305839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:26,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594170836] [2021-06-05 04:01:26,773 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:26,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:01:26,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:26,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:01:26,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:26,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594170836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:26,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:26,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-05 04:01:26,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235124136] [2021-06-05 04:01:26,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:01:26,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:26,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:01:26,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:01:26,828 INFO L87 Difference]: Start difference. First operand 113836 states and 427538 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:27,933 INFO L93 Difference]: Finished difference Result 124805 states and 462681 transitions. [2021-06-05 04:01:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:01:27,933 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:01:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:28,329 INFO L225 Difference]: With dead ends: 124805 [2021-06-05 04:01:28,329 INFO L226 Difference]: Without dead ends: 124469 [2021-06-05 04:01:28,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:01:28,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124469 states. [2021-06-05 04:01:30,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124469 to 117136. [2021-06-05 04:01:30,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117136 states, 117135 states have (on average 3.760541255815939) internal successors, (440491), 117135 states have internal predecessors, (440491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117136 states to 117136 states and 440491 transitions. [2021-06-05 04:01:31,345 INFO L78 Accepts]: Start accepts. Automaton has 117136 states and 440491 transitions. Word has length 29 [2021-06-05 04:01:31,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:31,346 INFO L482 AbstractCegarLoop]: Abstraction has 117136 states and 440491 transitions. [2021-06-05 04:01:31,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:31,346 INFO L276 IsEmpty]: Start isEmpty. Operand 117136 states and 440491 transitions. [2021-06-05 04:01:31,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:01:31,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:31,527 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:31,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:31,727 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:31,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:31,727 INFO L82 PathProgramCache]: Analyzing trace with hash -190689630, now seen corresponding path program 113 times [2021-06-05 04:01:31,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:31,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257972591] [2021-06-05 04:01:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:31,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:31,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257972591] [2021-06-05 04:01:31,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257972591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:31,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424734858] [2021-06-05 04:01:31,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:31,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:01:31,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:31,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:01:31,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:31,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:31,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424734858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:31,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:31,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 04:01:31,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132716080] [2021-06-05 04:01:31,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:01:31,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:31,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:01:31,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:01:31,803 INFO L87 Difference]: Start difference. First operand 117136 states and 440491 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:32,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:32,938 INFO L93 Difference]: Finished difference Result 131593 states and 486537 transitions. [2021-06-05 04:01:32,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:01:32,938 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:01:32,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:33,394 INFO L225 Difference]: With dead ends: 131593 [2021-06-05 04:01:33,394 INFO L226 Difference]: Without dead ends: 131578 [2021-06-05 04:01:33,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 412.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:01:33,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131578 states. [2021-06-05 04:01:35,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131578 to 118035. [2021-06-05 04:01:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118035 states, 118034 states have (on average 3.757493603537964) internal successors, (443512), 118034 states have internal predecessors, (443512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118035 states to 118035 states and 443512 transitions. [2021-06-05 04:01:36,340 INFO L78 Accepts]: Start accepts. Automaton has 118035 states and 443512 transitions. Word has length 29 [2021-06-05 04:01:36,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:36,340 INFO L482 AbstractCegarLoop]: Abstraction has 118035 states and 443512 transitions. [2021-06-05 04:01:36,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:36,341 INFO L276 IsEmpty]: Start isEmpty. Operand 118035 states and 443512 transitions. [2021-06-05 04:01:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:01:36,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:36,546 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:36,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:36,746 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:36,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:36,747 INFO L82 PathProgramCache]: Analyzing trace with hash 68105694, now seen corresponding path program 114 times [2021-06-05 04:01:36,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:36,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389766991] [2021-06-05 04:01:36,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:36,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:36,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389766991] [2021-06-05 04:01:36,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389766991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:36,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144106562] [2021-06-05 04:01:36,776 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:36,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:01:36,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:36,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:01:36,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:01:37,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144106562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:37,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:37,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 04:01:37,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273371041] [2021-06-05 04:01:37,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:01:37,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:37,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:01:37,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:01:37,297 INFO L87 Difference]: Start difference. First operand 118035 states and 443512 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:38,911 INFO L93 Difference]: Finished difference Result 162417 states and 578150 transitions. [2021-06-05 04:01:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 04:01:38,912 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:01:38,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:39,899 INFO L225 Difference]: With dead ends: 162417 [2021-06-05 04:01:39,899 INFO L226 Difference]: Without dead ends: 162210 [2021-06-05 04:01:39,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 1043.8ms TimeCoverageRelationStatistics Valid=1397, Invalid=4609, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 04:01:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162210 states. [2021-06-05 04:01:42,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162210 to 119675. [2021-06-05 04:01:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119675 states, 119674 states have (on average 3.739550779617962) internal successors, (447527), 119674 states have internal predecessors, (447527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:42,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119675 states to 119675 states and 447527 transitions. [2021-06-05 04:01:42,903 INFO L78 Accepts]: Start accepts. Automaton has 119675 states and 447527 transitions. Word has length 29 [2021-06-05 04:01:42,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:42,903 INFO L482 AbstractCegarLoop]: Abstraction has 119675 states and 447527 transitions. [2021-06-05 04:01:42,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:42,904 INFO L276 IsEmpty]: Start isEmpty. Operand 119675 states and 447527 transitions. [2021-06-05 04:01:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:01:43,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:43,083 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:43,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:43,292 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:43,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:43,293 INFO L82 PathProgramCache]: Analyzing trace with hash 218777654, now seen corresponding path program 115 times [2021-06-05 04:01:43,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:43,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977806660] [2021-06-05 04:01:43,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:43,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:43,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977806660] [2021-06-05 04:01:43,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977806660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:43,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796756515] [2021-06-05 04:01:43,311 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:43,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:43,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:01:43,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:43,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:01:43,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796756515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:43,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:43,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 04:01:43,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038207099] [2021-06-05 04:01:43,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:01:43,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:43,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:01:43,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:01:43,364 INFO L87 Difference]: Start difference. First operand 119675 states and 447527 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:44,532 INFO L93 Difference]: Finished difference Result 135149 states and 501662 transitions. [2021-06-05 04:01:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:01:44,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:01:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:44,941 INFO L225 Difference]: With dead ends: 135149 [2021-06-05 04:01:44,941 INFO L226 Difference]: Without dead ends: 135117 [2021-06-05 04:01:44,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:01:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135117 states. [2021-06-05 04:01:47,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135117 to 129535. [2021-06-05 04:01:47,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129535 states, 129534 states have (on average 3.746946747572066) internal successors, (485357), 129534 states have internal predecessors, (485357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:48,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129535 states to 129535 states and 485357 transitions. [2021-06-05 04:01:48,021 INFO L78 Accepts]: Start accepts. Automaton has 129535 states and 485357 transitions. Word has length 29 [2021-06-05 04:01:48,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:48,021 INFO L482 AbstractCegarLoop]: Abstraction has 129535 states and 485357 transitions. [2021-06-05 04:01:48,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:48,021 INFO L276 IsEmpty]: Start isEmpty. Operand 129535 states and 485357 transitions. [2021-06-05 04:01:48,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:01:48,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:48,231 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:48,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 04:01:48,445 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:48,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:48,445 INFO L82 PathProgramCache]: Analyzing trace with hash 512401842, now seen corresponding path program 116 times [2021-06-05 04:01:48,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:48,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737331584] [2021-06-05 04:01:48,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:01:48,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:48,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737331584] [2021-06-05 04:01:48,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737331584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:48,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93981307] [2021-06-05 04:01:48,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:48,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:01:48,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:48,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:01:48,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:01:49,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93981307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:49,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:49,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 04:01:49,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046584762] [2021-06-05 04:01:49,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:01:49,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:49,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:01:49,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:01:49,021 INFO L87 Difference]: Start difference. First operand 129535 states and 485357 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:49,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:49,753 INFO L93 Difference]: Finished difference Result 143528 states and 531160 transitions. [2021-06-05 04:01:49,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:01:49,753 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:01:49,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:50,211 INFO L225 Difference]: With dead ends: 143528 [2021-06-05 04:01:50,211 INFO L226 Difference]: Without dead ends: 143516 [2021-06-05 04:01:50,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:01:50,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143516 states. [2021-06-05 04:01:53,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143516 to 130136. [2021-06-05 04:01:53,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130136 states, 130135 states have (on average 3.7450416874783876) internal successors, (487361), 130135 states have internal predecessors, (487361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:53,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130136 states to 130136 states and 487361 transitions. [2021-06-05 04:01:53,970 INFO L78 Accepts]: Start accepts. Automaton has 130136 states and 487361 transitions. Word has length 29 [2021-06-05 04:01:53,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:53,971 INFO L482 AbstractCegarLoop]: Abstraction has 130136 states and 487361 transitions. [2021-06-05 04:01:53,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:53,971 INFO L276 IsEmpty]: Start isEmpty. Operand 130136 states and 487361 transitions. [2021-06-05 04:01:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:01:54,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:54,197 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:01:54,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 04:01:54,398 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:01:54,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:01:54,398 INFO L82 PathProgramCache]: Analyzing trace with hash 677507946, now seen corresponding path program 117 times [2021-06-05 04:01:54,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:01:54,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154055891] [2021-06-05 04:01:54,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:01:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:01:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:01:54,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:01:54,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154055891] [2021-06-05 04:01:54,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154055891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:54,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505102641] [2021-06-05 04:01:54,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:01:54,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:01:54,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:01:54,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:01:54,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:01:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:01:54,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505102641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:01:54,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:01:54,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 04:01:54,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256711718] [2021-06-05 04:01:54,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:01:54,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:01:54,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:01:54,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:01:54,503 INFO L87 Difference]: Start difference. First operand 130136 states and 487361 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:56,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:01:56,178 INFO L93 Difference]: Finished difference Result 158841 states and 570866 transitions. [2021-06-05 04:01:56,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 04:01:56,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:01:56,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:01:56,615 INFO L225 Difference]: With dead ends: 158841 [2021-06-05 04:01:56,615 INFO L226 Difference]: Without dead ends: 158080 [2021-06-05 04:01:56,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=450, Invalid=1272, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:01:56,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158080 states. [2021-06-05 04:01:59,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158080 to 127564. [2021-06-05 04:01:59,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127564 states, 127563 states have (on average 3.7467839420521623) internal successors, (477951), 127563 states have internal predecessors, (477951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127564 states to 127564 states and 477951 transitions. [2021-06-05 04:01:59,710 INFO L78 Accepts]: Start accepts. Automaton has 127564 states and 477951 transitions. Word has length 29 [2021-06-05 04:01:59,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:01:59,710 INFO L482 AbstractCegarLoop]: Abstraction has 127564 states and 477951 transitions. [2021-06-05 04:01:59,710 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:01:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 127564 states and 477951 transitions. [2021-06-05 04:01:59,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:01:59,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:01:59,900 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:00,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 04:02:00,101 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:00,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:00,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2080726810, now seen corresponding path program 118 times [2021-06-05 04:02:00,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:00,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315290956] [2021-06-05 04:02:00,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:02:00,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:00,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315290956] [2021-06-05 04:02:00,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315290956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:00,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764270144] [2021-06-05 04:02:00,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:00,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:02:00,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:00,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:02:00,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:00,184 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:02:00,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764270144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:00,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:00,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 04:02:00,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911205803] [2021-06-05 04:02:00,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:02:00,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:00,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:02:00,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:02:00,185 INFO L87 Difference]: Start difference. First operand 127564 states and 477951 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:01,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:01,405 INFO L93 Difference]: Finished difference Result 144032 states and 532857 transitions. [2021-06-05 04:02:01,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:02:01,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:02:01,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:01,835 INFO L225 Difference]: With dead ends: 144032 [2021-06-05 04:02:01,835 INFO L226 Difference]: Without dead ends: 144002 [2021-06-05 04:02:01,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:02:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144002 states. [2021-06-05 04:02:04,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144002 to 129426. [2021-06-05 04:02:04,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129426 states, 129425 states have (on average 3.7404597257098704) internal successors, (484109), 129425 states have internal predecessors, (484109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:05,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129426 states to 129426 states and 484109 transitions. [2021-06-05 04:02:05,434 INFO L78 Accepts]: Start accepts. Automaton has 129426 states and 484109 transitions. Word has length 29 [2021-06-05 04:02:05,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:05,434 INFO L482 AbstractCegarLoop]: Abstraction has 129426 states and 484109 transitions. [2021-06-05 04:02:05,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand 129426 states and 484109 transitions. [2021-06-05 04:02:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:02:05,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:05,680 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:05,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:05,895 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:05,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1305487906, now seen corresponding path program 119 times [2021-06-05 04:02:05,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:05,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447328477] [2021-06-05 04:02:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:05,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:05,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447328477] [2021-06-05 04:02:05,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447328477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:05,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761109723] [2021-06-05 04:02:05,929 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:05,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:02:05,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:05,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:02:05,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:05,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761109723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:05,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:05,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:02:05,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43472521] [2021-06-05 04:02:05,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:02:05,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:05,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:02:05,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:02:05,990 INFO L87 Difference]: Start difference. First operand 129426 states and 484109 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:06,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:06,754 INFO L93 Difference]: Finished difference Result 143204 states and 525770 transitions. [2021-06-05 04:02:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:02:06,754 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:02:06,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:07,721 INFO L225 Difference]: With dead ends: 143204 [2021-06-05 04:02:07,722 INFO L226 Difference]: Without dead ends: 143141 [2021-06-05 04:02:07,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:02:07,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143141 states. [2021-06-05 04:02:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143141 to 126464. [2021-06-05 04:02:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126464 states, 126463 states have (on average 3.727643658619517) internal successors, (471409), 126463 states have internal predecessors, (471409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:10,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126464 states to 126464 states and 471409 transitions. [2021-06-05 04:02:10,541 INFO L78 Accepts]: Start accepts. Automaton has 126464 states and 471409 transitions. Word has length 29 [2021-06-05 04:02:10,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:10,542 INFO L482 AbstractCegarLoop]: Abstraction has 126464 states and 471409 transitions. [2021-06-05 04:02:10,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:10,542 INFO L276 IsEmpty]: Start isEmpty. Operand 126464 states and 471409 transitions. [2021-06-05 04:02:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:02:10,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:10,771 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:10,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 04:02:10,973 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:10,973 INFO L82 PathProgramCache]: Analyzing trace with hash 2110231202, now seen corresponding path program 120 times [2021-06-05 04:02:10,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:10,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604903015] [2021-06-05 04:02:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:10,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:10,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604903015] [2021-06-05 04:02:10,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604903015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:10,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64147064] [2021-06-05 04:02:10,998 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:11,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:02:11,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:11,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:02:11,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:11,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64147064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:11,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:11,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 04:02:11,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137617955] [2021-06-05 04:02:11,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:02:11,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:11,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:02:11,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:02:11,093 INFO L87 Difference]: Start difference. First operand 126464 states and 471409 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:13,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:13,366 INFO L93 Difference]: Finished difference Result 186865 states and 670831 transitions. [2021-06-05 04:02:13,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 04:02:13,367 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 29 [2021-06-05 04:02:13,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:14,159 INFO L225 Difference]: With dead ends: 186865 [2021-06-05 04:02:14,160 INFO L226 Difference]: Without dead ends: 186574 [2021-06-05 04:02:14,160 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 491.6ms TimeCoverageRelationStatistics Valid=946, Invalid=3086, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 04:02:14,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186574 states. [2021-06-05 04:02:16,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186574 to 129576. [2021-06-05 04:02:17,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129576 states, 129575 states have (on average 3.7100983986108433) internal successors, (480736), 129575 states have internal predecessors, (480736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129576 states to 129576 states and 480736 transitions. [2021-06-05 04:02:17,423 INFO L78 Accepts]: Start accepts. Automaton has 129576 states and 480736 transitions. Word has length 29 [2021-06-05 04:02:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:17,423 INFO L482 AbstractCegarLoop]: Abstraction has 129576 states and 480736 transitions. [2021-06-05 04:02:17,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 129576 states and 480736 transitions. [2021-06-05 04:02:17,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 04:02:17,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:17,621 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:17,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:17,821 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:17,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:17,822 INFO L82 PathProgramCache]: Analyzing trace with hash 733832030, now seen corresponding path program 121 times [2021-06-05 04:02:17,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:17,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823170197] [2021-06-05 04:02:17,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:17,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:17,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823170197] [2021-06-05 04:02:17,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823170197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:17,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218382393] [2021-06-05 04:02:17,845 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:17,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 04:02:17,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:02:18,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218382393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:18,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:18,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-05 04:02:18,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308871901] [2021-06-05 04:02:18,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:02:18,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:18,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:02:18,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:02:18,376 INFO L87 Difference]: Start difference. First operand 129576 states and 480736 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:19,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:19,104 INFO L93 Difference]: Finished difference Result 140798 states and 513511 transitions. [2021-06-05 04:02:19,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:02:19,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 04:02:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:19,519 INFO L225 Difference]: With dead ends: 140798 [2021-06-05 04:02:19,519 INFO L226 Difference]: Without dead ends: 140342 [2021-06-05 04:02:19,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 516.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:02:19,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140342 states. [2021-06-05 04:02:22,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140342 to 130720. [2021-06-05 04:02:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130720 states, 130719 states have (on average 3.7030959539164163) internal successors, (484065), 130719 states have internal predecessors, (484065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:23,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130720 states to 130720 states and 484065 transitions. [2021-06-05 04:02:23,159 INFO L78 Accepts]: Start accepts. Automaton has 130720 states and 484065 transitions. Word has length 29 [2021-06-05 04:02:23,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:23,159 INFO L482 AbstractCegarLoop]: Abstraction has 130720 states and 484065 transitions. [2021-06-05 04:02:23,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:23,159 INFO L276 IsEmpty]: Start isEmpty. Operand 130720 states and 484065 transitions. [2021-06-05 04:02:23,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:02:23,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:23,396 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:23,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 04:02:23,596 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:23,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:23,597 INFO L82 PathProgramCache]: Analyzing trace with hash 565779372, now seen corresponding path program 122 times [2021-06-05 04:02:23,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:23,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528703470] [2021-06-05 04:02:23,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:23,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:23,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528703470] [2021-06-05 04:02:23,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528703470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:23,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542978727] [2021-06-05 04:02:23,690 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:23,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:02:23,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:23,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:02:23,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:23,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542978727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:23,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:23,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:02:23,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038862620] [2021-06-05 04:02:23,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:02:23,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:23,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:02:23,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:02:23,960 INFO L87 Difference]: Start difference. First operand 130720 states and 484065 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:25,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:25,452 INFO L93 Difference]: Finished difference Result 130957 states and 484770 transitions. [2021-06-05 04:02:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:02:25,452 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:02:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:25,802 INFO L225 Difference]: With dead ends: 130957 [2021-06-05 04:02:25,802 INFO L226 Difference]: Without dead ends: 130942 [2021-06-05 04:02:25,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 397.9ms TimeCoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:02:25,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130942 states. [2021-06-05 04:02:27,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130942 to 130808. [2021-06-05 04:02:28,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130808 states, 130807 states have (on average 3.702852293837486) internal successors, (484359), 130807 states have internal predecessors, (484359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130808 states to 130808 states and 484359 transitions. [2021-06-05 04:02:28,645 INFO L78 Accepts]: Start accepts. Automaton has 130808 states and 484359 transitions. Word has length 33 [2021-06-05 04:02:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:28,645 INFO L482 AbstractCegarLoop]: Abstraction has 130808 states and 484359 transitions. [2021-06-05 04:02:28,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:28,645 INFO L276 IsEmpty]: Start isEmpty. Operand 130808 states and 484359 transitions. [2021-06-05 04:02:28,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:02:28,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:28,874 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:29,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:29,075 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:29,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1661708648, now seen corresponding path program 123 times [2021-06-05 04:02:29,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:29,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415873480] [2021-06-05 04:02:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:29,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:29,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415873480] [2021-06-05 04:02:29,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415873480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:29,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605893179] [2021-06-05 04:02:29,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:29,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:02:29,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:29,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:02:29,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:29,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605893179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:29,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:29,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:02:29,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811841580] [2021-06-05 04:02:29,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:02:29,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:29,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:02:29,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:02:29,449 INFO L87 Difference]: Start difference. First operand 130808 states and 484359 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:30,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:30,901 INFO L93 Difference]: Finished difference Result 131223 states and 485558 transitions. [2021-06-05 04:02:30,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:02:30,901 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:02:30,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:31,291 INFO L225 Difference]: With dead ends: 131223 [2021-06-05 04:02:31,291 INFO L226 Difference]: Without dead ends: 131110 [2021-06-05 04:02:31,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:02:31,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131110 states. [2021-06-05 04:02:33,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131110 to 130915. [2021-06-05 04:02:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130915 states, 130914 states have (on average 3.7024840735139097) internal successors, (484707), 130914 states have internal predecessors, (484707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130915 states to 130915 states and 484707 transitions. [2021-06-05 04:02:34,095 INFO L78 Accepts]: Start accepts. Automaton has 130915 states and 484707 transitions. Word has length 33 [2021-06-05 04:02:34,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:34,095 INFO L482 AbstractCegarLoop]: Abstraction has 130915 states and 484707 transitions. [2021-06-05 04:02:34,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 130915 states and 484707 transitions. [2021-06-05 04:02:34,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:02:34,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:34,342 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:34,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2021-06-05 04:02:34,544 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:34,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:34,544 INFO L82 PathProgramCache]: Analyzing trace with hash 262334044, now seen corresponding path program 124 times [2021-06-05 04:02:34,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:34,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638514524] [2021-06-05 04:02:34,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:34,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:34,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:34,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638514524] [2021-06-05 04:02:34,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638514524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:34,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759109640] [2021-06-05 04:02:34,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:34,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:02:34,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:34,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:02:34,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:35,399 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:35,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759109640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:35,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:35,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:02:35,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044395305] [2021-06-05 04:02:35,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:02:35,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:35,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:02:35,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:02:35,400 INFO L87 Difference]: Start difference. First operand 130915 states and 484707 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:36,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:36,417 INFO L93 Difference]: Finished difference Result 131397 states and 486090 transitions. [2021-06-05 04:02:36,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:02:36,417 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:02:36,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:36,789 INFO L225 Difference]: With dead ends: 131397 [2021-06-05 04:02:36,789 INFO L226 Difference]: Without dead ends: 131308 [2021-06-05 04:02:36,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 341.5ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:02:37,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131308 states. [2021-06-05 04:02:38,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131308 to 131025. [2021-06-05 04:02:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131025 states, 131024 states have (on average 3.7022224935889607) internal successors, (485080), 131024 states have internal predecessors, (485080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:39,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131025 states to 131025 states and 485080 transitions. [2021-06-05 04:02:39,984 INFO L78 Accepts]: Start accepts. Automaton has 131025 states and 485080 transitions. Word has length 33 [2021-06-05 04:02:39,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:39,984 INFO L482 AbstractCegarLoop]: Abstraction has 131025 states and 485080 transitions. [2021-06-05 04:02:39,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:39,984 INFO L276 IsEmpty]: Start isEmpty. Operand 131025 states and 485080 transitions. [2021-06-05 04:02:40,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:02:40,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:40,304 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:40,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:40,504 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:40,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:40,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1720019168, now seen corresponding path program 125 times [2021-06-05 04:02:40,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:40,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697572285] [2021-06-05 04:02:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:40,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:40,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:40,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697572285] [2021-06-05 04:02:40,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697572285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:40,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827507536] [2021-06-05 04:02:40,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:40,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:02:40,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:40,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:02:40,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:40,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827507536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:40,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:40,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:02:40,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400990300] [2021-06-05 04:02:40,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:02:40,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:40,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:02:40,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:02:40,855 INFO L87 Difference]: Start difference. First operand 131025 states and 485080 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:41,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:41,840 INFO L93 Difference]: Finished difference Result 131417 states and 486203 transitions. [2021-06-05 04:02:41,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:02:41,841 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:02:41,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:42,673 INFO L225 Difference]: With dead ends: 131417 [2021-06-05 04:02:42,673 INFO L226 Difference]: Without dead ends: 131387 [2021-06-05 04:02:42,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 344.4ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:02:42,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131387 states. [2021-06-05 04:02:44,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131387 to 131100. [2021-06-05 04:02:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131100 states, 131099 states have (on average 3.70232419774369) internal successors, (485371), 131099 states have internal predecessors, (485371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:45,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131100 states to 131100 states and 485371 transitions. [2021-06-05 04:02:45,509 INFO L78 Accepts]: Start accepts. Automaton has 131100 states and 485371 transitions. Word has length 33 [2021-06-05 04:02:45,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:45,509 INFO L482 AbstractCegarLoop]: Abstraction has 131100 states and 485371 transitions. [2021-06-05 04:02:45,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:45,509 INFO L276 IsEmpty]: Start isEmpty. Operand 131100 states and 485371 transitions. [2021-06-05 04:02:45,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:02:45,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:45,760 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:45,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 04:02:45,965 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:45,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:45,965 INFO L82 PathProgramCache]: Analyzing trace with hash -168976428, now seen corresponding path program 126 times [2021-06-05 04:02:45,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:45,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488382815] [2021-06-05 04:02:45,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:46,052 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:46,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:46,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488382815] [2021-06-05 04:02:46,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488382815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:46,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855167670] [2021-06-05 04:02:46,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:46,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:02:46,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:46,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:02:46,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:46,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855167670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:46,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:46,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:02:46,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197037086] [2021-06-05 04:02:46,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:02:46,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:46,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:02:46,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:02:46,326 INFO L87 Difference]: Start difference. First operand 131100 states and 485371 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:47,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:47,702 INFO L93 Difference]: Finished difference Result 131430 states and 486305 transitions. [2021-06-05 04:02:47,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:02:47,702 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:02:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:48,068 INFO L225 Difference]: With dead ends: 131430 [2021-06-05 04:02:48,068 INFO L226 Difference]: Without dead ends: 131346 [2021-06-05 04:02:48,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 328.0ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:02:48,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131346 states. [2021-06-05 04:02:50,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131346 to 131132. [2021-06-05 04:02:50,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131132 states, 131131 states have (on average 3.7021528090230382) internal successors, (485467), 131131 states have internal predecessors, (485467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:50,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131132 states to 131132 states and 485467 transitions. [2021-06-05 04:02:50,880 INFO L78 Accepts]: Start accepts. Automaton has 131132 states and 485467 transitions. Word has length 33 [2021-06-05 04:02:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:50,880 INFO L482 AbstractCegarLoop]: Abstraction has 131132 states and 485467 transitions. [2021-06-05 04:02:50,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:50,881 INFO L276 IsEmpty]: Start isEmpty. Operand 131132 states and 485467 transitions. [2021-06-05 04:02:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:02:51,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:51,118 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:51,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 04:02:51,318 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:51,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1755066264, now seen corresponding path program 127 times [2021-06-05 04:02:51,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:51,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231753145] [2021-06-05 04:02:51,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:51,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:51,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231753145] [2021-06-05 04:02:51,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231753145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:51,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900978018] [2021-06-05 04:02:51,415 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:51,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:02:51,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:51,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900978018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:51,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:51,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:02:51,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512840953] [2021-06-05 04:02:51,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:02:51,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:51,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:02:51,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:02:51,711 INFO L87 Difference]: Start difference. First operand 131132 states and 485467 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:52,202 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 14 [2021-06-05 04:02:53,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:53,022 INFO L93 Difference]: Finished difference Result 131646 states and 486891 transitions. [2021-06-05 04:02:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:02:53,022 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:02:53,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:53,403 INFO L225 Difference]: With dead ends: 131646 [2021-06-05 04:02:53,403 INFO L226 Difference]: Without dead ends: 131557 [2021-06-05 04:02:53,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 723.0ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:02:53,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131557 states. [2021-06-05 04:02:55,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131557 to 131193. [2021-06-05 04:02:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131193 states, 131192 states have (on average 3.7020778706018658) internal successors, (485683), 131192 states have internal predecessors, (485683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:56,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131193 states to 131193 states and 485683 transitions. [2021-06-05 04:02:56,218 INFO L78 Accepts]: Start accepts. Automaton has 131193 states and 485683 transitions. Word has length 33 [2021-06-05 04:02:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:02:56,219 INFO L482 AbstractCegarLoop]: Abstraction has 131193 states and 485683 transitions. [2021-06-05 04:02:56,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 131193 states and 485683 transitions. [2021-06-05 04:02:56,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:02:56,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:02:56,979 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:02:57,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 04:02:57,179 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:02:57,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:02:57,179 INFO L82 PathProgramCache]: Analyzing trace with hash -227286948, now seen corresponding path program 128 times [2021-06-05 04:02:57,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:02:57,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871928724] [2021-06-05 04:02:57,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:02:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:02:57,266 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:57,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:02:57,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871928724] [2021-06-05 04:02:57,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871928724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:57,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023264518] [2021-06-05 04:02:57,266 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:02:57,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:02:57,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:02:57,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:02:57,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:02:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:02:57,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023264518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:02:57,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:02:57,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:02:57,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659895912] [2021-06-05 04:02:57,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:02:57,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:02:57,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:02:57,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:02:57,512 INFO L87 Difference]: Start difference. First operand 131193 states and 485683 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:02:58,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:02:58,409 INFO L93 Difference]: Finished difference Result 131828 states and 487461 transitions. [2021-06-05 04:02:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:02:58,409 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:02:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:02:58,791 INFO L225 Difference]: With dead ends: 131828 [2021-06-05 04:02:58,791 INFO L226 Difference]: Without dead ends: 131717 [2021-06-05 04:02:58,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:02:59,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131717 states. [2021-06-05 04:03:01,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131717 to 131381. [2021-06-05 04:03:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131381 states, 131380 states have (on average 3.7014537981427917) internal successors, (486297), 131380 states have internal predecessors, (486297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:02,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131381 states to 131381 states and 486297 transitions. [2021-06-05 04:03:02,104 INFO L78 Accepts]: Start accepts. Automaton has 131381 states and 486297 transitions. Word has length 33 [2021-06-05 04:03:02,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:02,105 INFO L482 AbstractCegarLoop]: Abstraction has 131381 states and 486297 transitions. [2021-06-05 04:03:02,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:02,105 INFO L276 IsEmpty]: Start isEmpty. Operand 131381 states and 486297 transitions. [2021-06-05 04:03:02,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:03:02,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:02,751 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:02,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:02,951 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:02,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:02,951 INFO L82 PathProgramCache]: Analyzing trace with hash -410972520, now seen corresponding path program 129 times [2021-06-05 04:03:02,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:02,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613751152] [2021-06-05 04:03:02,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:03,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:03,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613751152] [2021-06-05 04:03:03,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613751152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:03,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339165699] [2021-06-05 04:03:03,036 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:03:03,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:03:03,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:03,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:03:03,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:03,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339165699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:03,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:03,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:03:03,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878015241] [2021-06-05 04:03:03,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:03:03,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:03,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:03:03,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:03:03,355 INFO L87 Difference]: Start difference. First operand 131381 states and 486297 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:04,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:04,455 INFO L93 Difference]: Finished difference Result 131995 states and 488033 transitions. [2021-06-05 04:03:04,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:04,456 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:03:04,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:05,200 INFO L225 Difference]: With dead ends: 131995 [2021-06-05 04:03:05,200 INFO L226 Difference]: Without dead ends: 131906 [2021-06-05 04:03:05,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 308.2ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:03:05,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131906 states. [2021-06-05 04:03:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131906 to 131576. [2021-06-05 04:03:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131576 states, 131575 states have (on average 3.7008626258787762) internal successors, (486941), 131575 states have internal predecessors, (486941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131576 states to 131576 states and 486941 transitions. [2021-06-05 04:03:08,168 INFO L78 Accepts]: Start accepts. Automaton has 131576 states and 486941 transitions. Word has length 33 [2021-06-05 04:03:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:08,168 INFO L482 AbstractCegarLoop]: Abstraction has 131576 states and 486941 transitions. [2021-06-05 04:03:08,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:08,168 INFO L276 IsEmpty]: Start isEmpty. Operand 131576 states and 486941 transitions. [2021-06-05 04:03:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:03:08,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:08,420 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:08,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:08,621 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:08,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:08,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1901641564, now seen corresponding path program 130 times [2021-06-05 04:03:08,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:08,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076595440] [2021-06-05 04:03:08,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:08,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:08,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076595440] [2021-06-05 04:03:08,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076595440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:08,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672640688] [2021-06-05 04:03:08,713 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:08,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:08,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:08,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:03:08,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:08,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672640688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:08,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:08,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:03:08,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594177194] [2021-06-05 04:03:08,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:03:08,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:08,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:03:08,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:03:08,941 INFO L87 Difference]: Start difference. First operand 131576 states and 486941 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:10,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:10,396 INFO L93 Difference]: Finished difference Result 132177 states and 488586 transitions. [2021-06-05 04:03:10,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:10,396 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:03:10,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:10,758 INFO L225 Difference]: With dead ends: 132177 [2021-06-05 04:03:10,758 INFO L226 Difference]: Without dead ends: 132066 [2021-06-05 04:03:10,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 311.1ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:03:10,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132066 states. [2021-06-05 04:03:13,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132066 to 131642. [2021-06-05 04:03:13,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131642 states, 131641 states have (on average 3.700853077688562) internal successors, (487184), 131641 states have internal predecessors, (487184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131642 states to 131642 states and 487184 transitions. [2021-06-05 04:03:13,598 INFO L78 Accepts]: Start accepts. Automaton has 131642 states and 487184 transitions. Word has length 33 [2021-06-05 04:03:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:13,598 INFO L482 AbstractCegarLoop]: Abstraction has 131642 states and 487184 transitions. [2021-06-05 04:03:13,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 131642 states and 487184 transitions. [2021-06-05 04:03:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:03:13,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:13,836 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:14,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 04:03:14,036 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:14,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:14,036 INFO L82 PathProgramCache]: Analyzing trace with hash -773235108, now seen corresponding path program 131 times [2021-06-05 04:03:14,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:14,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226354316] [2021-06-05 04:03:14,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:14,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:14,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226354316] [2021-06-05 04:03:14,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226354316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:14,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846079653] [2021-06-05 04:03:14,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:14,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:03:14,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:14,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:03:14,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:14,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846079653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:14,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:14,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:03:14,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356324322] [2021-06-05 04:03:14,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:03:14,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:14,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:03:14,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:03:14,364 INFO L87 Difference]: Start difference. First operand 131642 states and 487184 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:15,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:15,773 INFO L93 Difference]: Finished difference Result 132137 states and 488592 transitions. [2021-06-05 04:03:15,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:03:15,780 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:03:15,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:16,177 INFO L225 Difference]: With dead ends: 132137 [2021-06-05 04:03:16,178 INFO L226 Difference]: Without dead ends: 132107 [2021-06-05 04:03:16,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:03:16,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132107 states. [2021-06-05 04:03:18,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132107 to 131739. [2021-06-05 04:03:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131739 states, 131738 states have (on average 3.7007697095750656) internal successors, (487532), 131738 states have internal predecessors, (487532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:19,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131739 states to 131739 states and 487532 transitions. [2021-06-05 04:03:19,074 INFO L78 Accepts]: Start accepts. Automaton has 131739 states and 487532 transitions. Word has length 33 [2021-06-05 04:03:19,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:19,074 INFO L482 AbstractCegarLoop]: Abstraction has 131739 states and 487532 transitions. [2021-06-05 04:03:19,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:19,074 INFO L276 IsEmpty]: Start isEmpty. Operand 131739 states and 487532 transitions. [2021-06-05 04:03:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:03:19,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:19,803 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:20,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 04:03:20,004 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:20,004 INFO L82 PathProgramCache]: Analyzing trace with hash -172389872, now seen corresponding path program 132 times [2021-06-05 04:03:20,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:20,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894849990] [2021-06-05 04:03:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:20,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:20,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894849990] [2021-06-05 04:03:20,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894849990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:20,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123289106] [2021-06-05 04:03:20,099 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:20,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:03:20,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:20,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:03:20,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:20,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123289106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:20,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:20,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:03:20,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406326516] [2021-06-05 04:03:20,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:03:20,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:20,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:03:20,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:03:20,378 INFO L87 Difference]: Start difference. First operand 131739 states and 487532 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:21,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:21,301 INFO L93 Difference]: Finished difference Result 132172 states and 488791 transitions. [2021-06-05 04:03:21,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:03:21,301 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:03:21,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:21,680 INFO L225 Difference]: With dead ends: 132172 [2021-06-05 04:03:21,680 INFO L226 Difference]: Without dead ends: 132142 [2021-06-05 04:03:21,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:03:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132142 states. [2021-06-05 04:03:23,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132142 to 131868. [2021-06-05 04:03:24,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131868 states, 131867 states have (on average 3.7004481788468686) internal successors, (487967), 131867 states have internal predecessors, (487967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:24,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131868 states to 131868 states and 487967 transitions. [2021-06-05 04:03:24,939 INFO L78 Accepts]: Start accepts. Automaton has 131868 states and 487967 transitions. Word has length 33 [2021-06-05 04:03:24,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:24,939 INFO L482 AbstractCegarLoop]: Abstraction has 131868 states and 487967 transitions. [2021-06-05 04:03:24,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:24,939 INFO L276 IsEmpty]: Start isEmpty. Operand 131868 states and 487967 transitions. [2021-06-05 04:03:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:03:25,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:25,265 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:25,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:25,465 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:25,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1751652820, now seen corresponding path program 133 times [2021-06-05 04:03:25,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:25,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601275704] [2021-06-05 04:03:25,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:25,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:25,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601275704] [2021-06-05 04:03:25,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601275704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:25,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473817461] [2021-06-05 04:03:25,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:25,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:03:25,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:25,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473817461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:25,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:25,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:03:25,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468522173] [2021-06-05 04:03:25,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:03:25,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:25,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:03:25,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:03:25,780 INFO L87 Difference]: Start difference. First operand 131868 states and 487967 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:26,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:26,774 INFO L93 Difference]: Finished difference Result 132329 states and 489260 transitions. [2021-06-05 04:03:26,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:26,775 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:03:26,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:27,687 INFO L225 Difference]: With dead ends: 132329 [2021-06-05 04:03:27,687 INFO L226 Difference]: Without dead ends: 132261 [2021-06-05 04:03:27,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:03:27,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132261 states. [2021-06-05 04:03:29,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132261 to 131985. [2021-06-05 04:03:29,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131985 states, 131984 states have (on average 3.7004258091889928) internal successors, (488397), 131984 states have internal predecessors, (488397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:30,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131985 states to 131985 states and 488397 transitions. [2021-06-05 04:03:30,525 INFO L78 Accepts]: Start accepts. Automaton has 131985 states and 488397 transitions. Word has length 33 [2021-06-05 04:03:30,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:30,525 INFO L482 AbstractCegarLoop]: Abstraction has 131985 states and 488397 transitions. [2021-06-05 04:03:30,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:30,525 INFO L276 IsEmpty]: Start isEmpty. Operand 131985 states and 488397 transitions. [2021-06-05 04:03:30,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:03:30,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:30,776 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:30,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:30,976 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:30,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:30,977 INFO L82 PathProgramCache]: Analyzing trace with hash -230700392, now seen corresponding path program 134 times [2021-06-05 04:03:30,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:30,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460169454] [2021-06-05 04:03:30,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:31,071 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:31,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:31,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460169454] [2021-06-05 04:03:31,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460169454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:31,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395411302] [2021-06-05 04:03:31,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:31,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:31,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:31,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:03:31,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:31,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395411302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:31,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:31,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:03:31,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769449340] [2021-06-05 04:03:31,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:03:31,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:31,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:03:31,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:03:31,292 INFO L87 Difference]: Start difference. First operand 131985 states and 488397 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:32,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:32,662 INFO L93 Difference]: Finished difference Result 132441 states and 489638 transitions. [2021-06-05 04:03:32,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:32,662 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:03:32,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:33,029 INFO L225 Difference]: With dead ends: 132441 [2021-06-05 04:03:33,029 INFO L226 Difference]: Without dead ends: 132361 [2021-06-05 04:03:33,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 286.6ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:03:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132361 states. [2021-06-05 04:03:35,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132361 to 131999. [2021-06-05 04:03:35,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131999 states, 131998 states have (on average 3.700328792860498) internal successors, (488436), 131998 states have internal predecessors, (488436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:35,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131999 states to 131999 states and 488436 transitions. [2021-06-05 04:03:35,747 INFO L78 Accepts]: Start accepts. Automaton has 131999 states and 488436 transitions. Word has length 33 [2021-06-05 04:03:35,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:35,747 INFO L482 AbstractCegarLoop]: Abstraction has 131999 states and 488436 transitions. [2021-06-05 04:03:35,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:35,748 INFO L276 IsEmpty]: Start isEmpty. Operand 131999 states and 488436 transitions. [2021-06-05 04:03:35,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:03:35,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:35,995 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:36,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:36,195 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:36,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:36,196 INFO L82 PathProgramCache]: Analyzing trace with hash -414385964, now seen corresponding path program 135 times [2021-06-05 04:03:36,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:36,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804835502] [2021-06-05 04:03:36,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:36,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:36,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804835502] [2021-06-05 04:03:36,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804835502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:36,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530490310] [2021-06-05 04:03:36,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:36,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:03:36,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:36,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:03:36,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:37,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530490310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:37,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:37,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:03:37,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036929410] [2021-06-05 04:03:37,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:03:37,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:37,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:03:37,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:03:37,039 INFO L87 Difference]: Start difference. First operand 131999 states and 488436 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:37,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:37,887 INFO L93 Difference]: Finished difference Result 132789 states and 490695 transitions. [2021-06-05 04:03:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:03:37,887 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:03:37,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:38,262 INFO L225 Difference]: With dead ends: 132789 [2021-06-05 04:03:38,262 INFO L226 Difference]: Without dead ends: 132700 [2021-06-05 04:03:38,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 300.2ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:03:38,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132700 states. [2021-06-05 04:03:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132700 to 132304. [2021-06-05 04:03:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132304 states, 132303 states have (on average 3.699349221106097) internal successors, (489435), 132303 states have internal predecessors, (489435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132304 states to 132304 states and 489435 transitions. [2021-06-05 04:03:41,070 INFO L78 Accepts]: Start accepts. Automaton has 132304 states and 489435 transitions. Word has length 33 [2021-06-05 04:03:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:41,070 INFO L482 AbstractCegarLoop]: Abstraction has 132304 states and 489435 transitions. [2021-06-05 04:03:41,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:41,071 INFO L276 IsEmpty]: Start isEmpty. Operand 132304 states and 489435 transitions. [2021-06-05 04:03:41,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:03:41,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:41,867 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:42,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2021-06-05 04:03:42,067 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:42,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1898228120, now seen corresponding path program 136 times [2021-06-05 04:03:42,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:42,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394915573] [2021-06-05 04:03:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:42,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:42,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394915573] [2021-06-05 04:03:42,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394915573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:42,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959488922] [2021-06-05 04:03:42,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:42,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:42,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:42,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:03:42,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:42,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959488922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:42,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:42,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:03:42,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296658102] [2021-06-05 04:03:42,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:03:42,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:42,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:03:42,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:03:42,386 INFO L87 Difference]: Start difference. First operand 132304 states and 489435 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:43,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:43,389 INFO L93 Difference]: Finished difference Result 132973 states and 491280 transitions. [2021-06-05 04:03:43,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:03:43,389 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:03:43,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:44,308 INFO L225 Difference]: With dead ends: 132973 [2021-06-05 04:03:44,308 INFO L226 Difference]: Without dead ends: 132862 [2021-06-05 04:03:44,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:03:44,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132862 states. [2021-06-05 04:03:46,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132862 to 132462. [2021-06-05 04:03:46,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132462 states, 132461 states have (on average 3.698794362114132) internal successors, (489946), 132461 states have internal predecessors, (489946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132462 states to 132462 states and 489946 transitions. [2021-06-05 04:03:47,238 INFO L78 Accepts]: Start accepts. Automaton has 132462 states and 489946 transitions. Word has length 33 [2021-06-05 04:03:47,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:47,238 INFO L482 AbstractCegarLoop]: Abstraction has 132462 states and 489946 transitions. [2021-06-05 04:03:47,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:47,238 INFO L276 IsEmpty]: Start isEmpty. Operand 132462 states and 489946 transitions. [2021-06-05 04:03:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:03:47,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:47,483 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:47,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 04:03:47,685 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:47,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:47,685 INFO L82 PathProgramCache]: Analyzing trace with hash -776648552, now seen corresponding path program 137 times [2021-06-05 04:03:47,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:47,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243185802] [2021-06-05 04:03:47,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:47,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:47,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243185802] [2021-06-05 04:03:47,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243185802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:47,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754578546] [2021-06-05 04:03:47,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:47,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:03:47,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:47,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:03:47,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:48,037 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:48,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754578546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:48,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:48,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:03:48,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088532315] [2021-06-05 04:03:48,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:03:48,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:48,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:03:48,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:03:48,037 INFO L87 Difference]: Start difference. First operand 132462 states and 489946 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:49,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:49,609 INFO L93 Difference]: Finished difference Result 133313 states and 492428 transitions. [2021-06-05 04:03:49,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:03:49,610 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:03:49,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:50,110 INFO L225 Difference]: With dead ends: 133313 [2021-06-05 04:03:50,110 INFO L226 Difference]: Without dead ends: 133267 [2021-06-05 04:03:50,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 288.4ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:03:50,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133267 states. [2021-06-05 04:03:52,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133267 to 132771. [2021-06-05 04:03:52,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132771 states, 132770 states have (on average 3.697635007908413) internal successors, (490935), 132770 states have internal predecessors, (490935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:53,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132771 states to 132771 states and 490935 transitions. [2021-06-05 04:03:53,139 INFO L78 Accepts]: Start accepts. Automaton has 132771 states and 490935 transitions. Word has length 33 [2021-06-05 04:03:53,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:53,139 INFO L482 AbstractCegarLoop]: Abstraction has 132771 states and 490935 transitions. [2021-06-05 04:03:53,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:53,139 INFO L276 IsEmpty]: Start isEmpty. Operand 132771 states and 490935 transitions. [2021-06-05 04:03:53,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:03:53,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:53,387 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:53,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 04:03:53,587 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:53,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:53,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1081481172, now seen corresponding path program 138 times [2021-06-05 04:03:53,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:53,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337159671] [2021-06-05 04:03:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:53,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:53,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337159671] [2021-06-05 04:03:53,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337159671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:53,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796426430] [2021-06-05 04:03:53,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:53,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:03:53,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:53,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:03:53,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:53,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796426430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:53,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:53,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:03:53,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563445207] [2021-06-05 04:03:53,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:03:53,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:53,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:03:53,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:03:53,923 INFO L87 Difference]: Start difference. First operand 132771 states and 490935 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:55,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:55,257 INFO L93 Difference]: Finished difference Result 133655 states and 493544 transitions. [2021-06-05 04:03:55,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:03:55,258 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:03:55,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:55,636 INFO L225 Difference]: With dead ends: 133655 [2021-06-05 04:03:55,636 INFO L226 Difference]: Without dead ends: 133607 [2021-06-05 04:03:55,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 287.8ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:03:55,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133607 states. [2021-06-05 04:03:57,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133607 to 133055. [2021-06-05 04:03:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133055 states, 133054 states have (on average 3.697047815172787) internal successors, (491907), 133054 states have internal predecessors, (491907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:58,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133055 states to 133055 states and 491907 transitions. [2021-06-05 04:03:58,446 INFO L78 Accepts]: Start accepts. Automaton has 133055 states and 491907 transitions. Word has length 33 [2021-06-05 04:03:58,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:58,447 INFO L482 AbstractCegarLoop]: Abstraction has 133055 states and 491907 transitions. [2021-06-05 04:03:58,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:58,447 INFO L276 IsEmpty]: Start isEmpty. Operand 133055 states and 491907 transitions. [2021-06-05 04:03:59,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:03:59,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:59,148 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:59,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 04:03:59,361 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:59,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:59,361 INFO L82 PathProgramCache]: Analyzing trace with hash -900872040, now seen corresponding path program 139 times [2021-06-05 04:03:59,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:59,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181883022] [2021-06-05 04:03:59,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:59,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:59,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181883022] [2021-06-05 04:03:59,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181883022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:59,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610119437] [2021-06-05 04:03:59,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:59,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:03:59,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:59,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610119437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:59,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:59,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:03:59,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954329404] [2021-06-05 04:03:59,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:03:59,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:59,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:03:59,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:03:59,685 INFO L87 Difference]: Start difference. First operand 133055 states and 491907 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:00,577 INFO L93 Difference]: Finished difference Result 134042 states and 494886 transitions. [2021-06-05 04:04:00,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:00,578 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:04:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:00,946 INFO L225 Difference]: With dead ends: 134042 [2021-06-05 04:04:00,947 INFO L226 Difference]: Without dead ends: 133996 [2021-06-05 04:04:00,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 288.2ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:04:01,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133996 states. [2021-06-05 04:04:03,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133996 to 133457. [2021-06-05 04:04:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133457 states, 133456 states have (on average 3.696132058506174) internal successors, (493271), 133456 states have internal predecessors, (493271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133457 states to 133457 states and 493271 transitions. [2021-06-05 04:04:04,275 INFO L78 Accepts]: Start accepts. Automaton has 133457 states and 493271 transitions. Word has length 33 [2021-06-05 04:04:04,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:04,275 INFO L482 AbstractCegarLoop]: Abstraction has 133457 states and 493271 transitions. [2021-06-05 04:04:04,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 133457 states and 493271 transitions. [2021-06-05 04:04:04,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:04:04,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:04,533 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:04,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 04:04:04,749 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:04,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:04,749 INFO L82 PathProgramCache]: Analyzing trace with hash 719218584, now seen corresponding path program 140 times [2021-06-05 04:04:04,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:04,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788008732] [2021-06-05 04:04:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:04,837 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:04,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:04,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788008732] [2021-06-05 04:04:04,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788008732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:04,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869070122] [2021-06-05 04:04:04,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:04,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:04,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:04,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:04:04,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:05,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869070122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:05,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:05,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:04:05,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970455507] [2021-06-05 04:04:05,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:04:05,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:05,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:04:05,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:05,075 INFO L87 Difference]: Start difference. First operand 133457 states and 493271 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:06,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:06,608 INFO L93 Difference]: Finished difference Result 134285 states and 495729 transitions. [2021-06-05 04:04:06,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:06,608 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:04:06,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:06,985 INFO L225 Difference]: With dead ends: 134285 [2021-06-05 04:04:06,986 INFO L226 Difference]: Without dead ends: 134239 [2021-06-05 04:04:06,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 306.0ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:04:07,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134239 states. [2021-06-05 04:04:09,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134239 to 133729. [2021-06-05 04:04:09,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133729 states, 133728 states have (on average 3.6952844580043074) internal successors, (494163), 133728 states have internal predecessors, (494163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133729 states to 133729 states and 494163 transitions. [2021-06-05 04:04:09,827 INFO L78 Accepts]: Start accepts. Automaton has 133729 states and 494163 transitions. Word has length 33 [2021-06-05 04:04:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:09,827 INFO L482 AbstractCegarLoop]: Abstraction has 133729 states and 494163 transitions. [2021-06-05 04:04:09,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:09,827 INFO L276 IsEmpty]: Start isEmpty. Operand 133729 states and 494163 transitions. [2021-06-05 04:04:10,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:04:10,059 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:10,059 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:10,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 04:04:10,260 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:10,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:10,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1446820200, now seen corresponding path program 141 times [2021-06-05 04:04:10,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:10,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861809578] [2021-06-05 04:04:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:10,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:10,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861809578] [2021-06-05 04:04:10,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861809578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:10,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514254517] [2021-06-05 04:04:10,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:10,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:10,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:10,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:04:10,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:10,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514254517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:10,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:10,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:04:10,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322103661] [2021-06-05 04:04:10,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:04:10,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:10,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:04:10,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:10,594 INFO L87 Difference]: Start difference. First operand 133729 states and 494163 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:11,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:11,951 INFO L93 Difference]: Finished difference Result 134286 states and 495782 transitions. [2021-06-05 04:04:11,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:04:11,952 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:04:11,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:12,320 INFO L225 Difference]: With dead ends: 134286 [2021-06-05 04:04:12,321 INFO L226 Difference]: Without dead ends: 134256 [2021-06-05 04:04:12,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 305.8ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:04:12,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134256 states. [2021-06-05 04:04:14,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134256 to 133862. [2021-06-05 04:04:14,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133862 states, 133861 states have (on average 3.6949522265633754) internal successors, (494610), 133861 states have internal predecessors, (494610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:15,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133862 states to 133862 states and 494610 transitions. [2021-06-05 04:04:15,226 INFO L78 Accepts]: Start accepts. Automaton has 133862 states and 494610 transitions. Word has length 33 [2021-06-05 04:04:15,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:15,226 INFO L482 AbstractCegarLoop]: Abstraction has 133862 states and 494610 transitions. [2021-06-05 04:04:15,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:15,226 INFO L276 IsEmpty]: Start isEmpty. Operand 133862 states and 494610 transitions. [2021-06-05 04:04:16,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:04:16,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:16,045 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:16,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:16,246 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:16,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:16,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1180848474, now seen corresponding path program 142 times [2021-06-05 04:04:16,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:16,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307572754] [2021-06-05 04:04:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:16,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:16,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307572754] [2021-06-05 04:04:16,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307572754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:16,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819227759] [2021-06-05 04:04:16,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:16,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:16,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:16,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:04:16,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:16,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819227759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:16,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:16,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:04:16,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537667706] [2021-06-05 04:04:16,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:04:16,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:16,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:04:16,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:16,623 INFO L87 Difference]: Start difference. First operand 133862 states and 494610 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:17,683 INFO L93 Difference]: Finished difference Result 134087 states and 495235 transitions. [2021-06-05 04:04:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:04:17,683 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:04:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:18,576 INFO L225 Difference]: With dead ends: 134087 [2021-06-05 04:04:18,576 INFO L226 Difference]: Without dead ends: 134059 [2021-06-05 04:04:18,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 414.9ms TimeCoverageRelationStatistics Valid=77, Invalid=735, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:04:18,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134059 states. [2021-06-05 04:04:20,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134059 to 133901. [2021-06-05 04:04:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133901 states, 133900 states have (on average 3.6948319641523524) internal successors, (494738), 133900 states have internal predecessors, (494738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:21,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133901 states to 133901 states and 494738 transitions. [2021-06-05 04:04:21,371 INFO L78 Accepts]: Start accepts. Automaton has 133901 states and 494738 transitions. Word has length 33 [2021-06-05 04:04:21,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:21,372 INFO L482 AbstractCegarLoop]: Abstraction has 133901 states and 494738 transitions. [2021-06-05 04:04:21,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:21,372 INFO L276 IsEmpty]: Start isEmpty. Operand 133901 states and 494738 transitions. [2021-06-05 04:04:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:04:21,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:21,632 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:21,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 04:04:21,832 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:21,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:21,832 INFO L82 PathProgramCache]: Analyzing trace with hash 886630802, now seen corresponding path program 143 times [2021-06-05 04:04:21,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:21,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479183099] [2021-06-05 04:04:21,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:21,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:21,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479183099] [2021-06-05 04:04:21,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479183099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:21,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265575060] [2021-06-05 04:04:21,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:21,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:04:21,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:21,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:04:21,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:22,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265575060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:22,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:22,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:04:22,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965268325] [2021-06-05 04:04:22,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:04:22,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:22,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:04:22,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:22,174 INFO L87 Difference]: Start difference. First operand 133901 states and 494738 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:23,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:23,658 INFO L93 Difference]: Finished difference Result 134211 states and 495550 transitions. [2021-06-05 04:04:23,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:04:23,659 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:04:23,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:24,065 INFO L225 Difference]: With dead ends: 134211 [2021-06-05 04:04:24,065 INFO L226 Difference]: Without dead ends: 134069 [2021-06-05 04:04:24,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:04:24,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134069 states. [2021-06-05 04:04:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134069 to 133952. [2021-06-05 04:04:26,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133952 states, 133951 states have (on average 3.694612208942076) internal successors, (494897), 133951 states have internal predecessors, (494897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133952 states to 133952 states and 494897 transitions. [2021-06-05 04:04:26,850 INFO L78 Accepts]: Start accepts. Automaton has 133952 states and 494897 transitions. Word has length 33 [2021-06-05 04:04:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:26,850 INFO L482 AbstractCegarLoop]: Abstraction has 133952 states and 494897 transitions. [2021-06-05 04:04:26,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:26,851 INFO L276 IsEmpty]: Start isEmpty. Operand 133952 states and 494897 transitions. [2021-06-05 04:04:27,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:04:27,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:27,098 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:27,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:27,299 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:27,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:27,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1484293802, now seen corresponding path program 144 times [2021-06-05 04:04:27,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:27,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605299269] [2021-06-05 04:04:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:27,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:27,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605299269] [2021-06-05 04:04:27,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605299269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:27,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708677493] [2021-06-05 04:04:27,390 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:27,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:04:27,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:27,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:04:27,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:27,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708677493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:27,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:27,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:04:27,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959447940] [2021-06-05 04:04:27,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:04:27,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:27,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:04:27,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:27,633 INFO L87 Difference]: Start difference. First operand 133952 states and 494897 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:28,332 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-06-05 04:04:29,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:29,024 INFO L93 Difference]: Finished difference Result 134387 states and 496089 transitions. [2021-06-05 04:04:29,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:04:29,024 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:04:29,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:29,393 INFO L225 Difference]: With dead ends: 134387 [2021-06-05 04:04:29,393 INFO L226 Difference]: Without dead ends: 134277 [2021-06-05 04:04:29,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 777.6ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:04:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134277 states. [2021-06-05 04:04:31,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134277 to 134057. [2021-06-05 04:04:31,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134057 states, 134056 states have (on average 3.694254639852002) internal successors, (495237), 134056 states have internal predecessors, (495237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:32,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134057 states to 134057 states and 495237 transitions. [2021-06-05 04:04:32,216 INFO L78 Accepts]: Start accepts. Automaton has 134057 states and 495237 transitions. Word has length 33 [2021-06-05 04:04:32,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:32,216 INFO L482 AbstractCegarLoop]: Abstraction has 134057 states and 495237 transitions. [2021-06-05 04:04:32,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:32,216 INFO L276 IsEmpty]: Start isEmpty. Operand 134057 states and 495237 transitions. [2021-06-05 04:04:32,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:04:32,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:32,968 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:33,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:33,184 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:33,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:33,184 INFO L82 PathProgramCache]: Analyzing trace with hash 828320282, now seen corresponding path program 145 times [2021-06-05 04:04:33,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:33,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970648947] [2021-06-05 04:04:33,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:33,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:33,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970648947] [2021-06-05 04:04:33,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970648947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:33,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163965987] [2021-06-05 04:04:33,284 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:33,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:04:33,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:33,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163965987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:33,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:33,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:04:33,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751467083] [2021-06-05 04:04:33,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:04:33,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:33,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:04:33,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:33,519 INFO L87 Difference]: Start difference. First operand 134057 states and 495237 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:34,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:34,515 INFO L93 Difference]: Finished difference Result 134490 states and 496428 transitions. [2021-06-05 04:04:34,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:04:34,515 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:04:34,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:35,420 INFO L225 Difference]: With dead ends: 134490 [2021-06-05 04:04:35,420 INFO L226 Difference]: Without dead ends: 134406 [2021-06-05 04:04:35,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 343.6ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:04:35,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134406 states. [2021-06-05 04:04:37,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134406 to 134109. [2021-06-05 04:04:37,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134109 states, 134108 states have (on average 3.694343365049065) internal successors, (495441), 134108 states have internal predecessors, (495441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134109 states to 134109 states and 495441 transitions. [2021-06-05 04:04:38,059 INFO L78 Accepts]: Start accepts. Automaton has 134109 states and 495441 transitions. Word has length 33 [2021-06-05 04:04:38,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:38,059 INFO L482 AbstractCegarLoop]: Abstraction has 134109 states and 495441 transitions. [2021-06-05 04:04:38,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:38,059 INFO L276 IsEmpty]: Start isEmpty. Operand 134109 states and 495441 transitions. [2021-06-05 04:04:38,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:04:38,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:38,897 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:39,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:39,097 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:39,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:39,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1915604274, now seen corresponding path program 146 times [2021-06-05 04:04:39,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:39,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392023188] [2021-06-05 04:04:39,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:39,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:39,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392023188] [2021-06-05 04:04:39,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392023188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:39,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704726471] [2021-06-05 04:04:39,196 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:39,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:39,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:39,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:04:39,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:39,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704726471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:39,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:39,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:04:39,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356951809] [2021-06-05 04:04:39,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:04:39,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:39,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:04:39,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:39,450 INFO L87 Difference]: Start difference. First operand 134109 states and 495441 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:40,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:40,424 INFO L93 Difference]: Finished difference Result 134427 states and 496277 transitions. [2021-06-05 04:04:40,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:04:40,424 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:04:40,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:41,307 INFO L225 Difference]: With dead ends: 134427 [2021-06-05 04:04:41,307 INFO L226 Difference]: Without dead ends: 134285 [2021-06-05 04:04:41,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 311.5ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:04:41,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134285 states. [2021-06-05 04:04:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134285 to 134133. [2021-06-05 04:04:43,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134133 states, 134132 states have (on average 3.694248948796708) internal successors, (495517), 134132 states have internal predecessors, (495517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134133 states to 134133 states and 495517 transitions. [2021-06-05 04:04:44,163 INFO L78 Accepts]: Start accepts. Automaton has 134133 states and 495517 transitions. Word has length 33 [2021-06-05 04:04:44,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:44,163 INFO L482 AbstractCegarLoop]: Abstraction has 134133 states and 495517 transitions. [2021-06-05 04:04:44,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:44,163 INFO L276 IsEmpty]: Start isEmpty. Operand 134133 states and 495517 transitions. [2021-06-05 04:04:44,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:04:44,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:44,427 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:44,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:44,627 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:44,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:44,628 INFO L82 PathProgramCache]: Analyzing trace with hash 8438418, now seen corresponding path program 147 times [2021-06-05 04:04:44,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:44,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601545505] [2021-06-05 04:04:44,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:44,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:44,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601545505] [2021-06-05 04:04:44,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601545505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:44,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788113339] [2021-06-05 04:04:44,729 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:44,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:04:44,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:44,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:04:44,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:44,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788113339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:44,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:44,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:04:44,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314208958] [2021-06-05 04:04:44,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:04:44,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:44,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:04:44,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:44,948 INFO L87 Difference]: Start difference. First operand 134133 states and 495517 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:46,524 INFO L93 Difference]: Finished difference Result 134488 states and 496453 transitions. [2021-06-05 04:04:46,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:04:46,525 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:04:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:46,891 INFO L225 Difference]: With dead ends: 134488 [2021-06-05 04:04:46,891 INFO L226 Difference]: Without dead ends: 134378 [2021-06-05 04:04:46,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 300.1ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:04:47,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134378 states. [2021-06-05 04:04:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134378 to 134238. [2021-06-05 04:04:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134238 states, 134237 states have (on average 3.6939815401118916) internal successors, (495869), 134237 states have internal predecessors, (495869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:49,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134238 states to 134238 states and 495869 transitions. [2021-06-05 04:04:49,711 INFO L78 Accepts]: Start accepts. Automaton has 134238 states and 495869 transitions. Word has length 33 [2021-06-05 04:04:49,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:49,711 INFO L482 AbstractCegarLoop]: Abstraction has 134238 states and 495869 transitions. [2021-06-05 04:04:49,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:49,712 INFO L276 IsEmpty]: Start isEmpty. Operand 134238 states and 495869 transitions. [2021-06-05 04:04:49,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:04:49,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:49,954 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:50,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 04:04:50,155 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:50,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1973914794, now seen corresponding path program 148 times [2021-06-05 04:04:50,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:50,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687248767] [2021-06-05 04:04:50,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:50,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:50,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687248767] [2021-06-05 04:04:50,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687248767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:50,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608040424] [2021-06-05 04:04:50,239 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:50,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:50,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:50,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:04:50,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:50,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608040424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:50,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:50,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:04:50,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602952647] [2021-06-05 04:04:50,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:04:50,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:50,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:04:50,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:50,475 INFO L87 Difference]: Start difference. First operand 134238 states and 495869 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:51,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:51,773 INFO L93 Difference]: Finished difference Result 134606 states and 496835 transitions. [2021-06-05 04:04:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:04:51,774 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:04:51,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:52,166 INFO L225 Difference]: With dead ends: 134606 [2021-06-05 04:04:52,166 INFO L226 Difference]: Without dead ends: 134470 [2021-06-05 04:04:52,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:04:52,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134470 states. [2021-06-05 04:04:54,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134470 to 134329. [2021-06-05 04:04:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134329 states, 134328 states have (on average 3.6937347388481925) internal successors, (496172), 134328 states have internal predecessors, (496172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:55,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134329 states to 134329 states and 496172 transitions. [2021-06-05 04:04:55,034 INFO L78 Accepts]: Start accepts. Automaton has 134329 states and 496172 transitions. Word has length 33 [2021-06-05 04:04:55,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:55,035 INFO L482 AbstractCegarLoop]: Abstraction has 134329 states and 496172 transitions. [2021-06-05 04:04:55,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:55,035 INFO L276 IsEmpty]: Start isEmpty. Operand 134329 states and 496172 transitions. [2021-06-05 04:04:55,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:04:55,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:55,797 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:56,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 04:04:56,013 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:56,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:56,013 INFO L82 PathProgramCache]: Analyzing trace with hash 2137366930, now seen corresponding path program 149 times [2021-06-05 04:04:56,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:56,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001948452] [2021-06-05 04:04:56,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:56,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:56,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001948452] [2021-06-05 04:04:56,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001948452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:56,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308078020] [2021-06-05 04:04:56,097 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:56,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:04:56,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:56,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:04:56,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:56,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308078020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:56,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:56,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:04:56,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347774567] [2021-06-05 04:04:56,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:04:56,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:56,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:04:56,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:56,370 INFO L87 Difference]: Start difference. First operand 134329 states and 496172 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:57,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:57,379 INFO L93 Difference]: Finished difference Result 134895 states and 497770 transitions. [2021-06-05 04:04:57,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:04:57,380 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:04:57,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:58,156 INFO L225 Difference]: With dead ends: 134895 [2021-06-05 04:04:58,156 INFO L226 Difference]: Without dead ends: 134785 [2021-06-05 04:04:58,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:04:58,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134785 states. [2021-06-05 04:05:00,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134785 to 134598. [2021-06-05 04:05:00,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134598 states, 134597 states have (on average 3.692853481132566) internal successors, (497047), 134597 states have internal predecessors, (497047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:01,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134598 states to 134598 states and 497047 transitions. [2021-06-05 04:05:01,006 INFO L78 Accepts]: Start accepts. Automaton has 134598 states and 497047 transitions. Word has length 33 [2021-06-05 04:05:01,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:01,006 INFO L482 AbstractCegarLoop]: Abstraction has 134598 states and 497047 transitions. [2021-06-05 04:05:01,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 134598 states and 497047 transitions. [2021-06-05 04:05:01,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:05:01,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:01,254 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:01,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 04:05:01,455 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:01,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:01,455 INFO L82 PathProgramCache]: Analyzing trace with hash 155013718, now seen corresponding path program 150 times [2021-06-05 04:05:01,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:01,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508231520] [2021-06-05 04:05:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:01,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:01,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508231520] [2021-06-05 04:05:01,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508231520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:01,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967973757] [2021-06-05 04:05:01,555 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:01,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:05:01,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:01,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:05:01,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:01,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967973757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:01,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:01,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:05:01,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618819450] [2021-06-05 04:05:01,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:05:01,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:01,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:05:01,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:01,804 INFO L87 Difference]: Start difference. First operand 134598 states and 497047 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:03,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:03,442 INFO L93 Difference]: Finished difference Result 135111 states and 498442 transitions. [2021-06-05 04:05:03,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:05:03,447 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:05:03,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:03,868 INFO L225 Difference]: With dead ends: 135111 [2021-06-05 04:05:03,868 INFO L226 Difference]: Without dead ends: 134975 [2021-06-05 04:05:03,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:05:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134975 states. [2021-06-05 04:05:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134975 to 134792. [2021-06-05 04:05:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134792 states, 134791 states have (on average 3.6920269157436327) internal successors, (497652), 134791 states have internal predecessors, (497652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134792 states to 134792 states and 497652 transitions. [2021-06-05 04:05:07,059 INFO L78 Accepts]: Start accepts. Automaton has 134792 states and 497652 transitions. Word has length 33 [2021-06-05 04:05:07,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:07,059 INFO L482 AbstractCegarLoop]: Abstraction has 134792 states and 497652 transitions. [2021-06-05 04:05:07,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 134792 states and 497652 transitions. [2021-06-05 04:05:07,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:05:07,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:07,328 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:07,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 04:05:07,544 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:07,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:07,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1775104342, now seen corresponding path program 151 times [2021-06-05 04:05:07,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:07,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389383388] [2021-06-05 04:05:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:07,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:07,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389383388] [2021-06-05 04:05:07,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389383388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:07,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683447795] [2021-06-05 04:05:07,639 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:07,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:05:07,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:08,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683447795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:08,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:08,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:05:08,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204813420] [2021-06-05 04:05:08,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:05:08,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:08,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:05:08,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:08,428 INFO L87 Difference]: Start difference. First operand 134792 states and 497652 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:09,473 INFO L93 Difference]: Finished difference Result 135221 states and 498845 transitions. [2021-06-05 04:05:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:09,473 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:05:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:09,858 INFO L225 Difference]: With dead ends: 135221 [2021-06-05 04:05:09,858 INFO L226 Difference]: Without dead ends: 135130 [2021-06-05 04:05:09,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 346.1ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:05:10,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135130 states. [2021-06-05 04:05:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135130 to 134844. [2021-06-05 04:05:12,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134844 states, 134843 states have (on average 3.6920270240205277) internal successors, (497844), 134843 states have internal predecessors, (497844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:12,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134844 states to 134844 states and 497844 transitions. [2021-06-05 04:05:12,851 INFO L78 Accepts]: Start accepts. Automaton has 134844 states and 497844 transitions. Word has length 33 [2021-06-05 04:05:12,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:12,851 INFO L482 AbstractCegarLoop]: Abstraction has 134844 states and 497844 transitions. [2021-06-05 04:05:12,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:12,851 INFO L276 IsEmpty]: Start isEmpty. Operand 134844 states and 497844 transitions. [2021-06-05 04:05:13,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:05:13,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:13,708 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:13,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:13,908 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:13,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:13,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1268459362, now seen corresponding path program 152 times [2021-06-05 04:05:13,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:13,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022542719] [2021-06-05 04:05:13,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:14,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:14,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022542719] [2021-06-05 04:05:14,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022542719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:14,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113850953] [2021-06-05 04:05:14,009 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:14,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:14,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:14,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:05:14,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:14,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113850953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:14,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:14,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:05:14,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047482226] [2021-06-05 04:05:14,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:05:14,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:14,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:05:14,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:14,296 INFO L87 Difference]: Start difference. First operand 134844 states and 497844 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:15,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:15,379 INFO L93 Difference]: Finished difference Result 135053 states and 498421 transitions. [2021-06-05 04:05:15,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:05:15,379 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:05:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:16,273 INFO L225 Difference]: With dead ends: 135053 [2021-06-05 04:05:16,273 INFO L226 Difference]: Without dead ends: 135025 [2021-06-05 04:05:16,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 405.6ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:05:16,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135025 states. [2021-06-05 04:05:18,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135025 to 134864. [2021-06-05 04:05:18,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134864 states, 134863 states have (on average 3.6919243973513862) internal successors, (497904), 134863 states have internal predecessors, (497904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134864 states to 134864 states and 497904 transitions. [2021-06-05 04:05:19,141 INFO L78 Accepts]: Start accepts. Automaton has 134864 states and 497904 transitions. Word has length 33 [2021-06-05 04:05:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:19,141 INFO L482 AbstractCegarLoop]: Abstraction has 134864 states and 497904 transitions. [2021-06-05 04:05:19,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 134864 states and 497904 transitions. [2021-06-05 04:05:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:05:19,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:19,408 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:19,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 04:05:19,608 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:19,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:19,609 INFO L82 PathProgramCache]: Analyzing trace with hash -959028658, now seen corresponding path program 153 times [2021-06-05 04:05:19,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:19,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208779619] [2021-06-05 04:05:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:19,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:19,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208779619] [2021-06-05 04:05:19,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208779619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:19,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278253398] [2021-06-05 04:05:19,696 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:19,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:05:19,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:19,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:05:19,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:19,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278253398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:19,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:19,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:05:19,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121616001] [2021-06-05 04:05:19,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:05:19,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:19,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:05:19,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:19,925 INFO L87 Difference]: Start difference. First operand 134864 states and 497904 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:21,393 INFO L93 Difference]: Finished difference Result 135170 states and 498704 transitions. [2021-06-05 04:05:21,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:21,393 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:05:21,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:21,761 INFO L225 Difference]: With dead ends: 135170 [2021-06-05 04:05:21,762 INFO L226 Difference]: Without dead ends: 135028 [2021-06-05 04:05:21,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 336.0ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:05:21,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135028 states. [2021-06-05 04:05:24,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135028 to 134868. [2021-06-05 04:05:24,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134868 states, 134867 states have (on average 3.691903875670105) internal successors, (497916), 134867 states have internal predecessors, (497916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134868 states to 134868 states and 497916 transitions. [2021-06-05 04:05:24,953 INFO L78 Accepts]: Start accepts. Automaton has 134868 states and 497916 transitions. Word has length 33 [2021-06-05 04:05:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:24,953 INFO L482 AbstractCegarLoop]: Abstraction has 134868 states and 497916 transitions. [2021-06-05 04:05:24,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 134868 states and 497916 transitions. [2021-06-05 04:05:25,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:05:25,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:25,237 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:25,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:25,451 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:25,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:25,452 INFO L82 PathProgramCache]: Analyzing trace with hash 965014034, now seen corresponding path program 154 times [2021-06-05 04:05:25,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:25,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579284128] [2021-06-05 04:05:25,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:25,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:25,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579284128] [2021-06-05 04:05:25,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579284128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:25,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851523059] [2021-06-05 04:05:25,543 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:25,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:25,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:25,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:05:25,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:25,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851523059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:25,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:25,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:05:25,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796500271] [2021-06-05 04:05:25,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:05:25,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:25,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:05:25,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:25,818 INFO L87 Difference]: Start difference. First operand 134868 states and 497916 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:27,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:27,262 INFO L93 Difference]: Finished difference Result 135436 states and 499523 transitions. [2021-06-05 04:05:27,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:27,263 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:05:27,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:27,646 INFO L225 Difference]: With dead ends: 135436 [2021-06-05 04:05:27,647 INFO L226 Difference]: Without dead ends: 135326 [2021-06-05 04:05:27,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:05:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135326 states. [2021-06-05 04:05:29,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135326 to 135008. [2021-06-05 04:05:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135008 states, 135007 states have (on average 3.6911123126948975) internal successors, (498326), 135007 states have internal predecessors, (498326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:30,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135008 states to 135008 states and 498326 transitions. [2021-06-05 04:05:30,571 INFO L78 Accepts]: Start accepts. Automaton has 135008 states and 498326 transitions. Word has length 33 [2021-06-05 04:05:30,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:30,571 INFO L482 AbstractCegarLoop]: Abstraction has 135008 states and 498326 transitions. [2021-06-05 04:05:30,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:30,571 INFO L276 IsEmpty]: Start isEmpty. Operand 135008 states and 498326 transitions. [2021-06-05 04:05:31,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:05:31,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:31,314 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:31,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:31,530 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:31,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:31,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1017339178, now seen corresponding path program 155 times [2021-06-05 04:05:31,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:31,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122707507] [2021-06-05 04:05:31,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:31,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:31,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122707507] [2021-06-05 04:05:31,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122707507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:31,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994155624] [2021-06-05 04:05:31,617 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:31,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:05:31,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:31,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:05:31,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:31,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994155624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:31,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:31,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:05:31,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488823160] [2021-06-05 04:05:31,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:05:31,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:31,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:05:31,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:31,867 INFO L87 Difference]: Start difference. First operand 135008 states and 498326 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:32,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:32,825 INFO L93 Difference]: Finished difference Result 135409 states and 499417 transitions. [2021-06-05 04:05:32,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:05:32,826 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:05:32,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:33,730 INFO L225 Difference]: With dead ends: 135409 [2021-06-05 04:05:33,730 INFO L226 Difference]: Without dead ends: 135325 [2021-06-05 04:05:33,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:05:33,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135325 states. [2021-06-05 04:05:35,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135325 to 134976. [2021-06-05 04:05:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134976 states, 134975 states have (on average 3.6913057973698833) internal successors, (498234), 134975 states have internal predecessors, (498234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134976 states to 134976 states and 498234 transitions. [2021-06-05 04:05:36,589 INFO L78 Accepts]: Start accepts. Automaton has 134976 states and 498234 transitions. Word has length 33 [2021-06-05 04:05:36,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:36,590 INFO L482 AbstractCegarLoop]: Abstraction has 134976 states and 498234 transitions. [2021-06-05 04:05:36,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:36,590 INFO L276 IsEmpty]: Start isEmpty. Operand 134976 states and 498234 transitions. [2021-06-05 04:05:36,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:05:36,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:36,864 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:37,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:37,080 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:37,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:37,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1160274146, now seen corresponding path program 156 times [2021-06-05 04:05:37,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:37,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231061237] [2021-06-05 04:05:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:37,174 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:37,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:37,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231061237] [2021-06-05 04:05:37,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231061237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:37,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738859092] [2021-06-05 04:05:37,174 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:37,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:05:37,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:37,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:05:37,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:37,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738859092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:37,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:37,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:05:37,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016700822] [2021-06-05 04:05:37,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:05:37,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:37,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:05:37,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:37,440 INFO L87 Difference]: Start difference. First operand 134976 states and 498234 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:38,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:38,926 INFO L93 Difference]: Finished difference Result 135181 states and 498843 transitions. [2021-06-05 04:05:38,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:05:38,927 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:05:38,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:39,321 INFO L225 Difference]: With dead ends: 135181 [2021-06-05 04:05:39,322 INFO L226 Difference]: Without dead ends: 135166 [2021-06-05 04:05:39,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 385.0ms TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:05:39,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135166 states. [2021-06-05 04:05:41,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135166 to 135012. [2021-06-05 04:05:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135012 states, 135011 states have (on average 3.6913362614898046) internal successors, (498371), 135011 states have internal predecessors, (498371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135012 states to 135012 states and 498371 transitions. [2021-06-05 04:05:42,095 INFO L78 Accepts]: Start accepts. Automaton has 135012 states and 498371 transitions. Word has length 33 [2021-06-05 04:05:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:42,095 INFO L482 AbstractCegarLoop]: Abstraction has 135012 states and 498371 transitions. [2021-06-05 04:05:42,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 135012 states and 498371 transitions. [2021-06-05 04:05:42,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:05:42,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:42,342 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:42,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-06-05 04:05:42,543 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:42,543 INFO L82 PathProgramCache]: Analyzing trace with hash 516165646, now seen corresponding path program 157 times [2021-06-05 04:05:42,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:42,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328867959] [2021-06-05 04:05:42,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:42,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:42,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328867959] [2021-06-05 04:05:42,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328867959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:42,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537814943] [2021-06-05 04:05:42,631 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:42,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:05:42,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:42,870 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:42,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537814943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:42,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:42,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:05:42,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476203515] [2021-06-05 04:05:42,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:05:42,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:42,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:05:42,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:42,871 INFO L87 Difference]: Start difference. First operand 135012 states and 498371 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:44,319 INFO L93 Difference]: Finished difference Result 135441 states and 499607 transitions. [2021-06-05 04:05:44,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:44,320 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:05:44,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:44,717 INFO L225 Difference]: With dead ends: 135441 [2021-06-05 04:05:44,717 INFO L226 Difference]: Without dead ends: 135329 [2021-06-05 04:05:44,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:05:44,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135329 states. [2021-06-05 04:05:47,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135329 to 135120. [2021-06-05 04:05:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135120 states, 135119 states have (on average 3.6909094945936545) internal successors, (498712), 135119 states have internal predecessors, (498712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135120 states to 135120 states and 498712 transitions. [2021-06-05 04:05:47,725 INFO L78 Accepts]: Start accepts. Automaton has 135120 states and 498712 transitions. Word has length 33 [2021-06-05 04:05:47,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:47,725 INFO L482 AbstractCegarLoop]: Abstraction has 135120 states and 498712 transitions. [2021-06-05 04:05:47,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:47,725 INFO L276 IsEmpty]: Start isEmpty. Operand 135120 states and 498712 transitions. [2021-06-05 04:05:48,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:05:48,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:48,612 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:48,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:48,813 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:48,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:48,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1371713326, now seen corresponding path program 158 times [2021-06-05 04:05:48,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:48,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905778383] [2021-06-05 04:05:48,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:48,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:48,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905778383] [2021-06-05 04:05:48,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905778383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:48,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577996324] [2021-06-05 04:05:48,902 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:48,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:48,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:48,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:05:48,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:49,159 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:49,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577996324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:49,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:49,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:05:49,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309578433] [2021-06-05 04:05:49,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:05:49,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:49,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:05:49,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:49,160 INFO L87 Difference]: Start difference. First operand 135120 states and 498712 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:50,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:50,192 INFO L93 Difference]: Finished difference Result 135711 states and 500369 transitions. [2021-06-05 04:05:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:50,193 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:05:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:51,075 INFO L225 Difference]: With dead ends: 135711 [2021-06-05 04:05:51,075 INFO L226 Difference]: Without dead ends: 135631 [2021-06-05 04:05:51,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 355.2ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:05:51,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135631 states. [2021-06-05 04:05:52,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135631 to 135275. [2021-06-05 04:05:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135275 states, 135274 states have (on average 3.690443100669752) internal successors, (499221), 135274 states have internal predecessors, (499221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:53,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135275 states to 135275 states and 499221 transitions. [2021-06-05 04:05:53,913 INFO L78 Accepts]: Start accepts. Automaton has 135275 states and 499221 transitions. Word has length 33 [2021-06-05 04:05:53,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:53,913 INFO L482 AbstractCegarLoop]: Abstraction has 135275 states and 499221 transitions. [2021-06-05 04:05:53,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:53,913 INFO L276 IsEmpty]: Start isEmpty. Operand 135275 states and 499221 transitions. [2021-06-05 04:05:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:05:54,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:54,165 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:54,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 04:05:54,365 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:54,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:54,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1177029994, now seen corresponding path program 159 times [2021-06-05 04:05:54,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:54,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293110550] [2021-06-05 04:05:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:54,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:54,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293110550] [2021-06-05 04:05:54,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293110550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:54,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247426000] [2021-06-05 04:05:54,456 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:54,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:05:54,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:54,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:05:54,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:54,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247426000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:54,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:54,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:05:54,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566069316] [2021-06-05 04:05:54,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:05:54,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:54,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:05:54,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:54,709 INFO L87 Difference]: Start difference. First operand 135275 states and 499221 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:56,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:56,172 INFO L93 Difference]: Finished difference Result 135676 states and 500356 transitions. [2021-06-05 04:05:56,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:05:56,173 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:05:56,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:56,574 INFO L225 Difference]: With dead ends: 135676 [2021-06-05 04:05:56,575 INFO L226 Difference]: Without dead ends: 135646 [2021-06-05 04:05:56,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:05:56,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135646 states. [2021-06-05 04:05:58,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135646 to 135346. [2021-06-05 04:05:58,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135346 states, 135345 states have (on average 3.690509438841479) internal successors, (499492), 135345 states have internal predecessors, (499492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135346 states to 135346 states and 499492 transitions. [2021-06-05 04:05:59,325 INFO L78 Accepts]: Start accepts. Automaton has 135346 states and 499492 transitions. Word has length 33 [2021-06-05 04:05:59,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:59,325 INFO L482 AbstractCegarLoop]: Abstraction has 135346 states and 499492 transitions. [2021-06-05 04:05:59,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 135346 states and 499492 transitions. [2021-06-05 04:05:59,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:05:59,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:59,571 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:59,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:59,772 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:59,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:59,772 INFO L82 PathProgramCache]: Analyzing trace with hash -588948574, now seen corresponding path program 160 times [2021-06-05 04:05:59,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:59,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914836327] [2021-06-05 04:05:59,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:59,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:59,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914836327] [2021-06-05 04:05:59,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914836327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:59,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909170119] [2021-06-05 04:05:59,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:59,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:59,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:59,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:05:59,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:00,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909170119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:00,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:00,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:06:00,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837531757] [2021-06-05 04:06:00,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:06:00,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:00,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:06:00,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:06:00,592 INFO L87 Difference]: Start difference. First operand 135346 states and 499492 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:01,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:01,457 INFO L93 Difference]: Finished difference Result 136007 states and 501349 transitions. [2021-06-05 04:06:01,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:06:01,458 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:06:01,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:01,826 INFO L225 Difference]: With dead ends: 136007 [2021-06-05 04:06:01,826 INFO L226 Difference]: Without dead ends: 135825 [2021-06-05 04:06:01,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 796.1ms TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:06:01,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135825 states. [2021-06-05 04:06:04,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135825 to 135578. [2021-06-05 04:06:04,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135578 states, 135577 states have (on average 3.6892393252542837) internal successors, (500176), 135577 states have internal predecessors, (500176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:05,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135578 states to 135578 states and 500176 transitions. [2021-06-05 04:06:05,070 INFO L78 Accepts]: Start accepts. Automaton has 135578 states and 500176 transitions. Word has length 33 [2021-06-05 04:06:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:05,070 INFO L482 AbstractCegarLoop]: Abstraction has 135578 states and 500176 transitions. [2021-06-05 04:06:05,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:05,070 INFO L276 IsEmpty]: Start isEmpty. Operand 135578 states and 500176 transitions. [2021-06-05 04:06:05,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:06:05,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:05,405 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:05,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 04:06:05,605 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:05,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:05,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1267056682, now seen corresponding path program 161 times [2021-06-05 04:06:05,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:05,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690250383] [2021-06-05 04:06:05,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:05,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:05,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690250383] [2021-06-05 04:06:05,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690250383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:05,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905580406] [2021-06-05 04:06:05,693 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:05,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:06:05,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:05,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:06:05,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:05,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905580406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:05,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:05,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:06:05,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715789949] [2021-06-05 04:06:05,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:06:05,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:05,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:06:05,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:06:05,947 INFO L87 Difference]: Start difference. First operand 135578 states and 500176 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:07,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:07,529 INFO L93 Difference]: Finished difference Result 136135 states and 501711 transitions. [2021-06-05 04:06:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:06:07,545 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:06:07,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:08,179 INFO L225 Difference]: With dead ends: 136135 [2021-06-05 04:06:08,179 INFO L226 Difference]: Without dead ends: 136008 [2021-06-05 04:06:08,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 341.1ms TimeCoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:06:08,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136008 states. [2021-06-05 04:06:10,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136008 to 135568. [2021-06-05 04:06:10,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135568 states, 135567 states have (on average 3.6892237786481963) internal successors, (500137), 135567 states have internal predecessors, (500137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:11,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135568 states to 135568 states and 500137 transitions. [2021-06-05 04:06:11,183 INFO L78 Accepts]: Start accepts. Automaton has 135568 states and 500137 transitions. Word has length 33 [2021-06-05 04:06:11,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:11,183 INFO L482 AbstractCegarLoop]: Abstraction has 135568 states and 500137 transitions. [2021-06-05 04:06:11,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:11,183 INFO L276 IsEmpty]: Start isEmpty. Operand 135568 states and 500137 transitions. [2021-06-05 04:06:11,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:06:11,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:11,444 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:11,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 04:06:11,644 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:11,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:11,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1810631706, now seen corresponding path program 162 times [2021-06-05 04:06:11,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:11,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196687568] [2021-06-05 04:06:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:11,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:11,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196687568] [2021-06-05 04:06:11,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196687568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:11,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681459630] [2021-06-05 04:06:11,732 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:11,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:06:11,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:11,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:06:11,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:11,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681459630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:11,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:11,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:06:11,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461238246] [2021-06-05 04:06:11,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:06:11,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:11,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:06:11,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:06:11,974 INFO L87 Difference]: Start difference. First operand 135568 states and 500137 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:13,485 INFO L93 Difference]: Finished difference Result 135962 states and 501194 transitions. [2021-06-05 04:06:13,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:06:13,485 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:06:13,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:13,855 INFO L225 Difference]: With dead ends: 135962 [2021-06-05 04:06:13,855 INFO L226 Difference]: Without dead ends: 135878 [2021-06-05 04:06:13,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 316.7ms TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:06:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135878 states. [2021-06-05 04:06:16,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135878 to 135615. [2021-06-05 04:06:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135615 states, 135614 states have (on average 3.689235624640524) internal successors, (500312), 135614 states have internal predecessors, (500312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135615 states to 135615 states and 500312 transitions. [2021-06-05 04:06:16,598 INFO L78 Accepts]: Start accepts. Automaton has 135615 states and 500312 transitions. Word has length 33 [2021-06-05 04:06:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:16,598 INFO L482 AbstractCegarLoop]: Abstraction has 135615 states and 500312 transitions. [2021-06-05 04:06:16,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 135615 states and 500312 transitions. [2021-06-05 04:06:16,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:06:16,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:16,850 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:17,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:17,050 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:17,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:17,051 INFO L82 PathProgramCache]: Analyzing trace with hash 654578334, now seen corresponding path program 163 times [2021-06-05 04:06:17,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:17,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675422338] [2021-06-05 04:06:17,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:17,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:17,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675422338] [2021-06-05 04:06:17,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675422338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:17,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950284904] [2021-06-05 04:06:17,132 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:17,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:06:17,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:17,374 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:17,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950284904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:17,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:17,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:06:17,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611565840] [2021-06-05 04:06:17,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:06:17,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:17,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:06:17,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:06:17,375 INFO L87 Difference]: Start difference. First operand 135615 states and 500312 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:18,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:18,790 INFO L93 Difference]: Finished difference Result 136030 states and 501487 transitions. [2021-06-05 04:06:18,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:06:18,791 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:06:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:19,174 INFO L225 Difference]: With dead ends: 136030 [2021-06-05 04:06:19,174 INFO L226 Difference]: Without dead ends: 136000 [2021-06-05 04:06:19,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 327.2ms TimeCoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:06:19,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136000 states. [2021-06-05 04:06:21,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136000 to 135676. [2021-06-05 04:06:21,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135676 states, 135675 states have (on average 3.689272157729869) internal successors, (500542), 135675 states have internal predecessors, (500542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:22,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135676 states to 135676 states and 500542 transitions. [2021-06-05 04:06:22,010 INFO L78 Accepts]: Start accepts. Automaton has 135676 states and 500542 transitions. Word has length 33 [2021-06-05 04:06:22,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:22,010 INFO L482 AbstractCegarLoop]: Abstraction has 135676 states and 500542 transitions. [2021-06-05 04:06:22,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:22,010 INFO L276 IsEmpty]: Start isEmpty. Operand 135676 states and 500542 transitions. [2021-06-05 04:06:22,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:06:22,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:22,799 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:23,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:23,013 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:23,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:23,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1745873050, now seen corresponding path program 164 times [2021-06-05 04:06:23,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:23,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859156471] [2021-06-05 04:06:23,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:23,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:23,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859156471] [2021-06-05 04:06:23,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859156471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:23,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995232422] [2021-06-05 04:06:23,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:23,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:23,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:23,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:06:23,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:23,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995232422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:23,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:23,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:06:23,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819941033] [2021-06-05 04:06:23,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:06:23,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:23,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:06:23,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:06:23,321 INFO L87 Difference]: Start difference. First operand 135676 states and 500542 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:24,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:24,190 INFO L93 Difference]: Finished difference Result 135970 states and 501235 transitions. [2021-06-05 04:06:24,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:06:24,191 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:06:24,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:25,105 INFO L225 Difference]: With dead ends: 135970 [2021-06-05 04:06:25,105 INFO L226 Difference]: Without dead ends: 135812 [2021-06-05 04:06:25,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:06:25,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135812 states. [2021-06-05 04:06:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135812 to 135650. [2021-06-05 04:06:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135650 states, 135649 states have (on average 3.6883869398226303) internal successors, (500326), 135649 states have internal predecessors, (500326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:28,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135650 states to 135650 states and 500326 transitions. [2021-06-05 04:06:28,027 INFO L78 Accepts]: Start accepts. Automaton has 135650 states and 500326 transitions. Word has length 33 [2021-06-05 04:06:28,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:28,027 INFO L482 AbstractCegarLoop]: Abstraction has 135650 states and 500326 transitions. [2021-06-05 04:06:28,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:28,028 INFO L276 IsEmpty]: Start isEmpty. Operand 135650 states and 500326 transitions. [2021-06-05 04:06:28,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:06:28,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:28,292 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:28,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 04:06:28,493 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:28,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:28,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1141614370, now seen corresponding path program 165 times [2021-06-05 04:06:28,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:28,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497556049] [2021-06-05 04:06:28,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:28,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:28,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497556049] [2021-06-05 04:06:28,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497556049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:28,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059943662] [2021-06-05 04:06:28,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:28,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:06:28,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:28,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:06:28,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:28,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059943662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:28,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:28,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:06:28,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654419147] [2021-06-05 04:06:28,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:06:28,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:28,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:06:28,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:06:28,809 INFO L87 Difference]: Start difference. First operand 135650 states and 500326 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:30,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:30,266 INFO L93 Difference]: Finished difference Result 136261 states and 501957 transitions. [2021-06-05 04:06:30,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:06:30,266 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:06:30,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:30,657 INFO L225 Difference]: With dead ends: 136261 [2021-06-05 04:06:30,657 INFO L226 Difference]: Without dead ends: 136063 [2021-06-05 04:06:30,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 274.9ms TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:06:30,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136063 states. [2021-06-05 04:06:32,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136063 to 135852. [2021-06-05 04:06:33,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135852 states, 135851 states have (on average 3.6868628129347596) internal successors, (500864), 135851 states have internal predecessors, (500864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135852 states to 135852 states and 500864 transitions. [2021-06-05 04:06:33,458 INFO L78 Accepts]: Start accepts. Automaton has 135852 states and 500864 transitions. Word has length 33 [2021-06-05 04:06:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:33,458 INFO L482 AbstractCegarLoop]: Abstraction has 135852 states and 500864 transitions. [2021-06-05 04:06:33,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 135852 states and 500864 transitions. [2021-06-05 04:06:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:06:33,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:33,708 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:33,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:33,908 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:33,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:33,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1527145246, now seen corresponding path program 166 times [2021-06-05 04:06:33,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:33,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334997614] [2021-06-05 04:06:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:33,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:33,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334997614] [2021-06-05 04:06:33,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334997614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:33,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738019790] [2021-06-05 04:06:33,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:34,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:34,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:34,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:06:34,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:34,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738019790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:34,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:34,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:06:34,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855502045] [2021-06-05 04:06:34,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:06:34,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:34,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:06:34,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:06:34,673 INFO L87 Difference]: Start difference. First operand 135852 states and 500864 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:35,555 INFO L93 Difference]: Finished difference Result 136405 states and 502442 transitions. [2021-06-05 04:06:35,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:06:35,556 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:06:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:35,938 INFO L225 Difference]: With dead ends: 136405 [2021-06-05 04:06:35,938 INFO L226 Difference]: Without dead ends: 136263 [2021-06-05 04:06:35,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 294.3ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:06:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136263 states. [2021-06-05 04:06:38,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136263 to 136063. [2021-06-05 04:06:38,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136063 states, 136062 states have (on average 3.6861283826490863) internal successors, (501542), 136062 states have internal predecessors, (501542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:38,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136063 states to 136063 states and 501542 transitions. [2021-06-05 04:06:38,995 INFO L78 Accepts]: Start accepts. Automaton has 136063 states and 501542 transitions. Word has length 33 [2021-06-05 04:06:38,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:38,995 INFO L482 AbstractCegarLoop]: Abstraction has 136063 states and 501542 transitions. [2021-06-05 04:06:38,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:38,995 INFO L276 IsEmpty]: Start isEmpty. Operand 136063 states and 501542 transitions. [2021-06-05 04:06:39,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:06:39,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:39,812 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:40,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:40,012 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:40,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:40,013 INFO L82 PathProgramCache]: Analyzing trace with hash 966556586, now seen corresponding path program 167 times [2021-06-05 04:06:40,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:40,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079064905] [2021-06-05 04:06:40,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:40,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:40,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079064905] [2021-06-05 04:06:40,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079064905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:40,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542080933] [2021-06-05 04:06:40,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:40,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:06:40,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:40,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:06:40,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:40,320 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:40,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542080933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:40,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:40,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:06:40,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318896658] [2021-06-05 04:06:40,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:06:40,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:40,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:06:40,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:06:40,320 INFO L87 Difference]: Start difference. First operand 136063 states and 501542 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:41,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:41,259 INFO L93 Difference]: Finished difference Result 136463 states and 502600 transitions. [2021-06-05 04:06:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:06:41,259 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:06:41,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:42,144 INFO L225 Difference]: With dead ends: 136463 [2021-06-05 04:06:42,144 INFO L226 Difference]: Without dead ends: 136357 [2021-06-05 04:06:42,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 270.5ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:06:42,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136357 states. [2021-06-05 04:06:43,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136357 to 136175. [2021-06-05 04:06:44,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136175 states, 136174 states have (on average 3.6854759352005524) internal successors, (501866), 136174 states have internal predecessors, (501866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:44,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136175 states to 136175 states and 501866 transitions. [2021-06-05 04:06:44,902 INFO L78 Accepts]: Start accepts. Automaton has 136175 states and 501866 transitions. Word has length 33 [2021-06-05 04:06:44,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:44,902 INFO L482 AbstractCegarLoop]: Abstraction has 136175 states and 501866 transitions. [2021-06-05 04:06:44,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 136175 states and 501866 transitions. [2021-06-05 04:06:45,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:06:45,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:45,156 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:45,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:45,357 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:45,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1161239918, now seen corresponding path program 168 times [2021-06-05 04:06:45,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:45,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373384114] [2021-06-05 04:06:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:45,439 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:45,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:45,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373384114] [2021-06-05 04:06:45,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373384114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:45,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134629413] [2021-06-05 04:06:45,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:45,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:06:45,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:45,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:06:45,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:45,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134629413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:45,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:45,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:06:45,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683969681] [2021-06-05 04:06:45,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:06:45,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:45,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:06:45,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:06:45,675 INFO L87 Difference]: Start difference. First operand 136175 states and 501866 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:47,159 INFO L93 Difference]: Finished difference Result 136837 states and 503693 transitions. [2021-06-05 04:06:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:06:47,160 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:06:47,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:47,546 INFO L225 Difference]: With dead ends: 136837 [2021-06-05 04:06:47,546 INFO L226 Difference]: Without dead ends: 136710 [2021-06-05 04:06:47,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:06:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136710 states. [2021-06-05 04:06:49,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136710 to 136135. [2021-06-05 04:06:49,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136135 states, 136134 states have (on average 3.686360497744869) internal successors, (501839), 136134 states have internal predecessors, (501839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:50,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136135 states to 136135 states and 501839 transitions. [2021-06-05 04:06:50,238 INFO L78 Accepts]: Start accepts. Automaton has 136135 states and 501839 transitions. Word has length 33 [2021-06-05 04:06:50,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:50,238 INFO L482 AbstractCegarLoop]: Abstraction has 136135 states and 501839 transitions. [2021-06-05 04:06:50,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:50,238 INFO L276 IsEmpty]: Start isEmpty. Operand 136135 states and 501839 transitions. [2021-06-05 04:06:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:06:50,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:50,484 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:50,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-05 04:06:50,685 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:50,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:50,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1704814942, now seen corresponding path program 169 times [2021-06-05 04:06:50,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:50,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521485158] [2021-06-05 04:06:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:50,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:50,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521485158] [2021-06-05 04:06:50,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521485158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:50,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020314257] [2021-06-05 04:06:50,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:50,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:06:50,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:51,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020314257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:51,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:51,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:06:51,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463596479] [2021-06-05 04:06:51,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:06:51,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:51,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:06:51,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:06:51,470 INFO L87 Difference]: Start difference. First operand 136135 states and 501839 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:52,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:52,355 INFO L93 Difference]: Finished difference Result 136552 states and 502951 transitions. [2021-06-05 04:06:52,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:06:52,356 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:06:52,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:52,730 INFO L225 Difference]: With dead ends: 136552 [2021-06-05 04:06:52,730 INFO L226 Difference]: Without dead ends: 136408 [2021-06-05 04:06:52,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 736.1ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:06:52,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136408 states. [2021-06-05 04:06:55,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136408 to 136224. [2021-06-05 04:06:55,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136224 states, 136223 states have (on average 3.6858460025105892) internal successors, (502097), 136223 states have internal predecessors, (502097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:56,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136224 states to 136224 states and 502097 transitions. [2021-06-05 04:06:56,201 INFO L78 Accepts]: Start accepts. Automaton has 136224 states and 502097 transitions. Word has length 33 [2021-06-05 04:06:56,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:56,201 INFO L482 AbstractCegarLoop]: Abstraction has 136224 states and 502097 transitions. [2021-06-05 04:06:56,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:56,202 INFO L276 IsEmpty]: Start isEmpty. Operand 136224 states and 502097 transitions. [2021-06-05 04:06:56,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:06:56,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:56,532 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:56,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:56,732 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:56,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:56,733 INFO L82 PathProgramCache]: Analyzing trace with hash 548761570, now seen corresponding path program 170 times [2021-06-05 04:06:56,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:56,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614622633] [2021-06-05 04:06:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:56,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:56,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614622633] [2021-06-05 04:06:56,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614622633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:56,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239720906] [2021-06-05 04:06:56,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:56,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:56,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:56,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:06:56,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:57,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239720906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:57,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:57,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:06:57,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552245508] [2021-06-05 04:06:57,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:06:57,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:57,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:06:57,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:06:57,035 INFO L87 Difference]: Start difference. First operand 136224 states and 502097 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:58,577 INFO L93 Difference]: Finished difference Result 136817 states and 503721 transitions. [2021-06-05 04:06:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:06:58,584 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:06:58,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:58,939 INFO L225 Difference]: With dead ends: 136817 [2021-06-05 04:06:58,939 INFO L226 Difference]: Without dead ends: 136702 [2021-06-05 04:06:58,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:06:59,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136702 states. [2021-06-05 04:07:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136702 to 136321. [2021-06-05 04:07:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136321 states, 136320 states have (on average 3.68581279342723) internal successors, (502450), 136320 states have internal predecessors, (502450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:01,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136321 states to 136321 states and 502450 transitions. [2021-06-05 04:07:01,762 INFO L78 Accepts]: Start accepts. Automaton has 136321 states and 502450 transitions. Word has length 33 [2021-06-05 04:07:01,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:01,762 INFO L482 AbstractCegarLoop]: Abstraction has 136321 states and 502450 transitions. [2021-06-05 04:07:01,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:01,762 INFO L276 IsEmpty]: Start isEmpty. Operand 136321 states and 502450 transitions. [2021-06-05 04:07:02,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:07:02,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:02,003 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:02,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 04:07:02,203 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:02,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:02,204 INFO L82 PathProgramCache]: Analyzing trace with hash 308801818, now seen corresponding path program 171 times [2021-06-05 04:07:02,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:02,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838205226] [2021-06-05 04:07:02,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:02,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:02,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838205226] [2021-06-05 04:07:02,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838205226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:02,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366541878] [2021-06-05 04:07:02,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:02,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:07:02,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:02,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:07:02,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:02,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366541878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:02,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:02,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:07:02,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323306172] [2021-06-05 04:07:02,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:07:02,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:02,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:07:02,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:07:02,509 INFO L87 Difference]: Start difference. First operand 136321 states and 502450 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:03,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:03,827 INFO L93 Difference]: Finished difference Result 136671 states and 503372 transitions. [2021-06-05 04:07:03,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:07:03,828 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:07:03,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:04,211 INFO L225 Difference]: With dead ends: 136671 [2021-06-05 04:07:04,211 INFO L226 Difference]: Without dead ends: 136497 [2021-06-05 04:07:04,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 267.9ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:07:04,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136497 states. [2021-06-05 04:07:06,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136497 to 136433. [2021-06-05 04:07:06,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136433 states, 136432 states have (on average 3.6851911574997067) internal successors, (502778), 136432 states have internal predecessors, (502778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:06,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136433 states to 136433 states and 502778 transitions. [2021-06-05 04:07:06,991 INFO L78 Accepts]: Start accepts. Automaton has 136433 states and 502778 transitions. Word has length 33 [2021-06-05 04:07:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:06,991 INFO L482 AbstractCegarLoop]: Abstraction has 136433 states and 502778 transitions. [2021-06-05 04:07:06,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:06,991 INFO L276 IsEmpty]: Start isEmpty. Operand 136433 states and 502778 transitions. [2021-06-05 04:07:07,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:07:07,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:07,248 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:07,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 04:07:07,450 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:07,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:07,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1656613022, now seen corresponding path program 172 times [2021-06-05 04:07:07,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:07,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524845011] [2021-06-05 04:07:07,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:07,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:07,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:07,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524845011] [2021-06-05 04:07:07,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524845011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:07,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370647234] [2021-06-05 04:07:07,534 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:07,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:07:07,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:07,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:07:07,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:08,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370647234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:08,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:08,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:07:08,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232460494] [2021-06-05 04:07:08,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:07:08,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:08,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:07:08,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:07:08,291 INFO L87 Difference]: Start difference. First operand 136433 states and 502778 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:09,274 INFO L93 Difference]: Finished difference Result 136787 states and 503684 transitions. [2021-06-05 04:07:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:07:09,274 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:07:09,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:09,644 INFO L225 Difference]: With dead ends: 136787 [2021-06-05 04:07:09,644 INFO L226 Difference]: Without dead ends: 136633 [2021-06-05 04:07:09,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 788.1ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:07:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136633 states. [2021-06-05 04:07:11,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136633 to 136417. [2021-06-05 04:07:11,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136417 states, 136416 states have (on average 3.6851322425521933) internal successors, (502711), 136416 states have internal predecessors, (502711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:12,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136417 states to 136417 states and 502711 transitions. [2021-06-05 04:07:12,827 INFO L78 Accepts]: Start accepts. Automaton has 136417 states and 502711 transitions. Word has length 33 [2021-06-05 04:07:12,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:12,827 INFO L482 AbstractCegarLoop]: Abstraction has 136417 states and 502711 transitions. [2021-06-05 04:07:12,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:12,827 INFO L276 IsEmpty]: Start isEmpty. Operand 136417 states and 502711 transitions. [2021-06-05 04:07:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:07:13,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:13,172 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:13,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:13,373 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:13,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:13,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1189214166, now seen corresponding path program 173 times [2021-06-05 04:07:13,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:13,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045588451] [2021-06-05 04:07:13,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:13,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:13,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045588451] [2021-06-05 04:07:13,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045588451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:13,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97574402] [2021-06-05 04:07:13,455 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:13,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 04:07:13,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:13,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:07:13,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:13,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97574402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:13,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:13,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:07:13,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003095215] [2021-06-05 04:07:13,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:07:13,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:13,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:07:13,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:07:13,683 INFO L87 Difference]: Start difference. First operand 136417 states and 502711 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:14,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:14,650 INFO L93 Difference]: Finished difference Result 137004 states and 504307 transitions. [2021-06-05 04:07:14,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:07:14,651 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:07:14,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:15,549 INFO L225 Difference]: With dead ends: 137004 [2021-06-05 04:07:15,549 INFO L226 Difference]: Without dead ends: 136877 [2021-06-05 04:07:15,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 284.9ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:07:15,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136877 states. [2021-06-05 04:07:17,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136877 to 136498. [2021-06-05 04:07:17,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136498 states, 136497 states have (on average 3.6851652417269243) internal successors, (503014), 136497 states have internal predecessors, (503014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:18,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136498 states to 136498 states and 503014 transitions. [2021-06-05 04:07:18,439 INFO L78 Accepts]: Start accepts. Automaton has 136498 states and 503014 transitions. Word has length 33 [2021-06-05 04:07:18,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:18,439 INFO L482 AbstractCegarLoop]: Abstraction has 136498 states and 503014 transitions. [2021-06-05 04:07:18,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:18,439 INFO L276 IsEmpty]: Start isEmpty. Operand 136498 states and 503014 transitions. [2021-06-05 04:07:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:07:18,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:18,695 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:18,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-06-05 04:07:18,895 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:18,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:18,896 INFO L82 PathProgramCache]: Analyzing trace with hash -323997470, now seen corresponding path program 174 times [2021-06-05 04:07:18,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:18,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100836421] [2021-06-05 04:07:18,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:07:18,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:18,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100836421] [2021-06-05 04:07:18,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100836421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:18,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548142156] [2021-06-05 04:07:18,976 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:19,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:07:19,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:19,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:07:19,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:19,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548142156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:19,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:19,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:07:19,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133989763] [2021-06-05 04:07:19,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:07:19,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:19,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:07:19,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:07:19,211 INFO L87 Difference]: Start difference. First operand 136498 states and 503014 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:20,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:20,630 INFO L93 Difference]: Finished difference Result 137151 states and 504800 transitions. [2021-06-05 04:07:20,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:07:20,630 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:07:20,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:21,008 INFO L225 Difference]: With dead ends: 137151 [2021-06-05 04:07:21,008 INFO L226 Difference]: Without dead ends: 137008 [2021-06-05 04:07:21,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 285.3ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:07:21,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137008 states. [2021-06-05 04:07:23,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137008 to 136605. [2021-06-05 04:07:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136605 states, 136604 states have (on average 3.685111709759597) internal successors, (503401), 136604 states have internal predecessors, (503401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:23,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136605 states to 136605 states and 503401 transitions. [2021-06-05 04:07:23,874 INFO L78 Accepts]: Start accepts. Automaton has 136605 states and 503401 transitions. Word has length 33 [2021-06-05 04:07:23,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:23,874 INFO L482 AbstractCegarLoop]: Abstraction has 136605 states and 503401 transitions. [2021-06-05 04:07:23,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:23,874 INFO L276 IsEmpty]: Start isEmpty. Operand 136605 states and 503401 transitions. [2021-06-05 04:07:24,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:07:24,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:24,598 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:24,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:24,813 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:24,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:24,813 INFO L82 PathProgramCache]: Analyzing trace with hash 740825498, now seen corresponding path program 175 times [2021-06-05 04:07:24,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:24,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030300241] [2021-06-05 04:07:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:24,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:24,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030300241] [2021-06-05 04:07:24,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030300241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:24,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642198720] [2021-06-05 04:07:24,888 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:24,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:24,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:07:24,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:25,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642198720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:25,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:25,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:07:25,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20837639] [2021-06-05 04:07:25,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:07:25,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:25,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:07:25,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:07:25,112 INFO L87 Difference]: Start difference. First operand 136605 states and 503401 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:26,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:26,080 INFO L93 Difference]: Finished difference Result 137345 states and 505531 transitions. [2021-06-05 04:07:26,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:07:26,081 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:07:26,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:26,473 INFO L225 Difference]: With dead ends: 137345 [2021-06-05 04:07:26,474 INFO L226 Difference]: Without dead ends: 137202 [2021-06-05 04:07:26,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:07:27,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137202 states. [2021-06-05 04:07:28,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137202 to 136759. [2021-06-05 04:07:29,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136759 states, 136758 states have (on average 3.6850348791295575) internal successors, (503958), 136758 states have internal predecessors, (503958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:29,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136759 states to 136759 states and 503958 transitions. [2021-06-05 04:07:29,892 INFO L78 Accepts]: Start accepts. Automaton has 136759 states and 503958 transitions. Word has length 33 [2021-06-05 04:07:29,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:29,892 INFO L482 AbstractCegarLoop]: Abstraction has 136759 states and 503958 transitions. [2021-06-05 04:07:29,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:29,892 INFO L276 IsEmpty]: Start isEmpty. Operand 136759 states and 503958 transitions. [2021-06-05 04:07:30,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:07:30,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:30,156 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:30,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 04:07:30,357 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:30,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:30,357 INFO L82 PathProgramCache]: Analyzing trace with hash -2124902626, now seen corresponding path program 176 times [2021-06-05 04:07:30,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:30,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406619853] [2021-06-05 04:07:30,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:30,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:30,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406619853] [2021-06-05 04:07:30,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406619853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:30,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685587615] [2021-06-05 04:07:30,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:30,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:07:30,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:30,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:07:30,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:30,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685587615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:30,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:30,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:07:30,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190676272] [2021-06-05 04:07:30,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:07:30,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:30,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:07:30,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:07:30,677 INFO L87 Difference]: Start difference. First operand 136759 states and 503958 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:32,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:32,070 INFO L93 Difference]: Finished difference Result 137461 states and 505914 transitions. [2021-06-05 04:07:32,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:07:32,080 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:07:32,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:32,475 INFO L225 Difference]: With dead ends: 137461 [2021-06-05 04:07:32,475 INFO L226 Difference]: Without dead ends: 137356 [2021-06-05 04:07:32,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 266.6ms TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:07:32,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137356 states. [2021-06-05 04:07:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137356 to 136882. [2021-06-05 04:07:34,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136882 states, 136881 states have (on average 3.685040290471285) internal successors, (504412), 136881 states have internal predecessors, (504412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:35,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136882 states to 136882 states and 504412 transitions. [2021-06-05 04:07:35,236 INFO L78 Accepts]: Start accepts. Automaton has 136882 states and 504412 transitions. Word has length 33 [2021-06-05 04:07:35,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:35,236 INFO L482 AbstractCegarLoop]: Abstraction has 136882 states and 504412 transitions. [2021-06-05 04:07:35,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:35,236 INFO L276 IsEmpty]: Start isEmpty. Operand 136882 states and 504412 transitions. [2021-06-05 04:07:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:07:35,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:35,493 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:35,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:35,693 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:35,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:35,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1248276962, now seen corresponding path program 177 times [2021-06-05 04:07:35,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:35,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127318125] [2021-06-05 04:07:35,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:35,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:35,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127318125] [2021-06-05 04:07:35,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127318125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:35,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226204333] [2021-06-05 04:07:35,778 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:35,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:07:35,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:35,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:07:35,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:36,464 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-06-05 04:07:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:36,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226204333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:36,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:36,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:07:36,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411999486] [2021-06-05 04:07:36,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:07:36,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:36,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:07:36,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:07:36,497 INFO L87 Difference]: Start difference. First operand 136882 states and 504412 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:37,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:37,609 INFO L93 Difference]: Finished difference Result 138201 states and 508135 transitions. [2021-06-05 04:07:37,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:07:37,610 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:07:37,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:37,992 INFO L225 Difference]: With dead ends: 138201 [2021-06-05 04:07:37,993 INFO L226 Difference]: Without dead ends: 138065 [2021-06-05 04:07:37,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 299.3ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:07:38,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138065 states. [2021-06-05 04:07:40,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138065 to 136923. [2021-06-05 04:07:40,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136923 states, 136922 states have (on average 3.6860110135697695) internal successors, (504696), 136922 states have internal predecessors, (504696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:41,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136923 states to 136923 states and 504696 transitions. [2021-06-05 04:07:41,608 INFO L78 Accepts]: Start accepts. Automaton has 136923 states and 504696 transitions. Word has length 33 [2021-06-05 04:07:41,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:41,608 INFO L482 AbstractCegarLoop]: Abstraction has 136923 states and 504696 transitions. [2021-06-05 04:07:41,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:41,609 INFO L276 IsEmpty]: Start isEmpty. Operand 136923 states and 504696 transitions. [2021-06-05 04:07:41,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:07:41,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:41,870 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:42,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:42,071 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:42,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:42,072 INFO L82 PathProgramCache]: Analyzing trace with hash -960276966, now seen corresponding path program 178 times [2021-06-05 04:07:42,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:42,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723662221] [2021-06-05 04:07:42,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:42,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:42,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723662221] [2021-06-05 04:07:42,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723662221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:42,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926708876] [2021-06-05 04:07:42,155 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:42,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:07:42,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:42,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:07:42,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:42,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926708876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:42,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:42,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:07:42,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32778832] [2021-06-05 04:07:42,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:07:42,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:42,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:07:42,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:07:42,387 INFO L87 Difference]: Start difference. First operand 136923 states and 504696 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:43,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:43,839 INFO L93 Difference]: Finished difference Result 137357 states and 505946 transitions. [2021-06-05 04:07:43,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:07:43,839 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:07:43,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:44,212 INFO L225 Difference]: With dead ends: 137357 [2021-06-05 04:07:44,212 INFO L226 Difference]: Without dead ends: 137275 [2021-06-05 04:07:44,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:07:44,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137275 states. [2021-06-05 04:07:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137275 to 136972. [2021-06-05 04:07:46,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136972 states, 136971 states have (on average 3.6859627220360514) internal successors, (504870), 136971 states have internal predecessors, (504870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:47,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136972 states to 136972 states and 504870 transitions. [2021-06-05 04:07:47,126 INFO L78 Accepts]: Start accepts. Automaton has 136972 states and 504870 transitions. Word has length 33 [2021-06-05 04:07:47,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:47,126 INFO L482 AbstractCegarLoop]: Abstraction has 136972 states and 504870 transitions. [2021-06-05 04:07:47,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:47,127 INFO L276 IsEmpty]: Start isEmpty. Operand 136972 states and 504870 transitions. [2021-06-05 04:07:47,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:07:47,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:47,383 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:47,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:47,584 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:47,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:47,584 INFO L82 PathProgramCache]: Analyzing trace with hash 963765726, now seen corresponding path program 179 times [2021-06-05 04:07:47,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:47,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662510165] [2021-06-05 04:07:47,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:47,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:47,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662510165] [2021-06-05 04:07:47,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662510165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:47,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763045600] [2021-06-05 04:07:47,671 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:47,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:07:47,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:47,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:07:47,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:47,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763045600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:47,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:47,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:07:47,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70739342] [2021-06-05 04:07:47,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:07:47,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:47,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:07:47,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:07:47,908 INFO L87 Difference]: Start difference. First operand 136972 states and 504870 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:49,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:49,284 INFO L93 Difference]: Finished difference Result 137654 states and 506819 transitions. [2021-06-05 04:07:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:07:49,284 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:07:49,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:49,670 INFO L225 Difference]: With dead ends: 137654 [2021-06-05 04:07:49,670 INFO L226 Difference]: Without dead ends: 137544 [2021-06-05 04:07:49,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 278.5ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:07:49,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137544 states. [2021-06-05 04:07:51,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137544 to 137016. [2021-06-05 04:07:52,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137016 states, 137015 states have (on average 3.6854650950625842) internal successors, (504964), 137015 states have internal predecessors, (504964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137016 states to 137016 states and 504964 transitions. [2021-06-05 04:07:52,577 INFO L78 Accepts]: Start accepts. Automaton has 137016 states and 504964 transitions. Word has length 33 [2021-06-05 04:07:52,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:52,577 INFO L482 AbstractCegarLoop]: Abstraction has 137016 states and 504964 transitions. [2021-06-05 04:07:52,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:52,577 INFO L276 IsEmpty]: Start isEmpty. Operand 137016 states and 504964 transitions. [2021-06-05 04:07:53,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:07:53,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:53,318 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:53,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:53,533 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:53,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:53,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1018587486, now seen corresponding path program 180 times [2021-06-05 04:07:53,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:53,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358816293] [2021-06-05 04:07:53,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:53,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:53,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:53,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358816293] [2021-06-05 04:07:53,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358816293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:53,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71197496] [2021-06-05 04:07:53,623 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:53,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:07:53,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:53,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:07:53,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:53,866 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:53,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71197496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:53,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:53,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:07:53,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32290824] [2021-06-05 04:07:53,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:07:53,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:53,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:07:53,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:07:53,866 INFO L87 Difference]: Start difference. First operand 137016 states and 504964 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:54,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:54,806 INFO L93 Difference]: Finished difference Result 137774 states and 507159 transitions. [2021-06-05 04:07:54,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:07:54,807 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:07:54,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:55,740 INFO L225 Difference]: With dead ends: 137774 [2021-06-05 04:07:55,740 INFO L226 Difference]: Without dead ends: 137632 [2021-06-05 04:07:55,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:07:55,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137632 states. [2021-06-05 04:07:57,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137632 to 137314. [2021-06-05 04:07:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137314 states, 137313 states have (on average 3.6842760700006556) internal successors, (505899), 137313 states have internal predecessors, (505899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:58,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137314 states to 137314 states and 505899 transitions. [2021-06-05 04:07:58,627 INFO L78 Accepts]: Start accepts. Automaton has 137314 states and 505899 transitions. Word has length 33 [2021-06-05 04:07:58,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:58,627 INFO L482 AbstractCegarLoop]: Abstraction has 137314 states and 505899 transitions. [2021-06-05 04:07:58,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:58,628 INFO L276 IsEmpty]: Start isEmpty. Operand 137314 states and 505899 transitions. [2021-06-05 04:07:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:07:58,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:58,878 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:59,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 04:07:59,078 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:59,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:59,079 INFO L82 PathProgramCache]: Analyzing trace with hash 2060260002, now seen corresponding path program 181 times [2021-06-05 04:07:59,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:59,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403548328] [2021-06-05 04:07:59,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:59,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:59,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403548328] [2021-06-05 04:07:59,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403548328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:59,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244311754] [2021-06-05 04:07:59,177 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:59,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:07:59,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:59,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244311754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:59,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:59,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:07:59,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677175995] [2021-06-05 04:07:59,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:07:59,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:59,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:07:59,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:07:59,414 INFO L87 Difference]: Start difference. First operand 137314 states and 505899 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:00,766 INFO L93 Difference]: Finished difference Result 138356 states and 508861 transitions. [2021-06-05 04:08:00,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:08:00,766 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:08:00,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:01,159 INFO L225 Difference]: With dead ends: 138356 [2021-06-05 04:08:01,159 INFO L226 Difference]: Without dead ends: 138306 [2021-06-05 04:08:01,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:08:01,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138306 states. [2021-06-05 04:08:03,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138306 to 137637. [2021-06-05 04:08:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137637 states, 137636 states have (on average 3.6833241303147433) internal successors, (506958), 137636 states have internal predecessors, (506958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:03,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137637 states to 137637 states and 506958 transitions. [2021-06-05 04:08:03,979 INFO L78 Accepts]: Start accepts. Automaton has 137637 states and 506958 transitions. Word has length 33 [2021-06-05 04:08:03,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:03,979 INFO L482 AbstractCegarLoop]: Abstraction has 137637 states and 506958 transitions. [2021-06-05 04:08:03,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:03,979 INFO L276 IsEmpty]: Start isEmpty. Operand 137637 states and 506958 transitions. [2021-06-05 04:08:04,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:08:04,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:04,712 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:04,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 04:08:04,927 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:04,927 INFO L82 PathProgramCache]: Analyzing trace with hash -138504034, now seen corresponding path program 182 times [2021-06-05 04:08:04,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:04,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725330411] [2021-06-05 04:08:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:05,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:05,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725330411] [2021-06-05 04:08:05,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725330411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:05,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597227446] [2021-06-05 04:08:05,007 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:05,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:05,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:05,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:08:05,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:05,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597227446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:05,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:05,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:08:05,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475953275] [2021-06-05 04:08:05,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:08:05,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:05,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:08:05,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:08:05,288 INFO L87 Difference]: Start difference. First operand 137637 states and 506958 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:06,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:06,199 INFO L93 Difference]: Finished difference Result 138581 states and 509568 transitions. [2021-06-05 04:08:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:08:06,199 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:08:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:07,043 INFO L225 Difference]: With dead ends: 138581 [2021-06-05 04:08:07,043 INFO L226 Difference]: Without dead ends: 138407 [2021-06-05 04:08:07,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:08:07,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138407 states. [2021-06-05 04:08:08,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138407 to 138053. [2021-06-05 04:08:09,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138053 states, 138052 states have (on average 3.681779329528004) internal successors, (508277), 138052 states have internal predecessors, (508277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:09,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138053 states to 138053 states and 508277 transitions. [2021-06-05 04:08:09,894 INFO L78 Accepts]: Start accepts. Automaton has 138053 states and 508277 transitions. Word has length 33 [2021-06-05 04:08:09,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:09,894 INFO L482 AbstractCegarLoop]: Abstraction has 138053 states and 508277 transitions. [2021-06-05 04:08:09,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:09,894 INFO L276 IsEmpty]: Start isEmpty. Operand 138053 states and 508277 transitions. [2021-06-05 04:08:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:08:10,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:10,143 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:10,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 04:08:10,345 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:10,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1821858026, now seen corresponding path program 183 times [2021-06-05 04:08:10,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:10,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278253638] [2021-06-05 04:08:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:10,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:10,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278253638] [2021-06-05 04:08:10,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278253638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:10,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811716961] [2021-06-05 04:08:10,421 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:10,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:08:10,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:10,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:08:10,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:10,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811716961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:10,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:10,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:08:10,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425761554] [2021-06-05 04:08:10,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:08:10,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:10,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:08:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:10,645 INFO L87 Difference]: Start difference. First operand 138053 states and 508277 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:11,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:11,918 INFO L93 Difference]: Finished difference Result 138483 states and 509458 transitions. [2021-06-05 04:08:11,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:08:11,919 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:08:11,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:12,340 INFO L225 Difference]: With dead ends: 138483 [2021-06-05 04:08:12,340 INFO L226 Difference]: Without dead ends: 138301 [2021-06-05 04:08:12,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 244.7ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:08:12,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138301 states. [2021-06-05 04:08:14,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138301 to 138093. [2021-06-05 04:08:14,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138093 states, 138092 states have (on average 3.6815239115951686) internal successors, (508389), 138092 states have internal predecessors, (508389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:15,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138093 states to 138093 states and 508389 transitions. [2021-06-05 04:08:15,226 INFO L78 Accepts]: Start accepts. Automaton has 138093 states and 508389 transitions. Word has length 33 [2021-06-05 04:08:15,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:15,226 INFO L482 AbstractCegarLoop]: Abstraction has 138093 states and 508389 transitions. [2021-06-05 04:08:15,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:15,226 INFO L276 IsEmpty]: Start isEmpty. Operand 138093 states and 508389 transitions. [2021-06-05 04:08:15,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:08:15,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:15,487 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:15,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:15,693 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:15,693 INFO L82 PathProgramCache]: Analyzing trace with hash -137840346, now seen corresponding path program 184 times [2021-06-05 04:08:15,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:15,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701098571] [2021-06-05 04:08:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:15,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:15,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701098571] [2021-06-05 04:08:15,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701098571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:15,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365055715] [2021-06-05 04:08:15,774 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:16,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:16,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:16,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:08:16,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:16,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365055715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:16,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:16,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:08:16,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006927116] [2021-06-05 04:08:16,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:08:16,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:16,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:08:16,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:16,617 INFO L87 Difference]: Start difference. First operand 138093 states and 508389 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:17,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:17,454 INFO L93 Difference]: Finished difference Result 138781 states and 510361 transitions. [2021-06-05 04:08:17,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:08:17,454 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:08:17,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:17,836 INFO L225 Difference]: With dead ends: 138781 [2021-06-05 04:08:17,836 INFO L226 Difference]: Without dead ends: 138699 [2021-06-05 04:08:17,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 294.3ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:08:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138699 states. [2021-06-05 04:08:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138699 to 138281. [2021-06-05 04:08:20,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138281 states, 138280 states have (on average 3.6812481920740527) internal successors, (509043), 138280 states have internal predecessors, (509043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138281 states to 138281 states and 509043 transitions. [2021-06-05 04:08:21,318 INFO L78 Accepts]: Start accepts. Automaton has 138281 states and 509043 transitions. Word has length 33 [2021-06-05 04:08:21,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:21,318 INFO L482 AbstractCegarLoop]: Abstraction has 138281 states and 509043 transitions. [2021-06-05 04:08:21,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 138281 states and 509043 transitions. [2021-06-05 04:08:21,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:08:21,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:21,593 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:21,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:21,793 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:21,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:21,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1939105810, now seen corresponding path program 185 times [2021-06-05 04:08:21,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:21,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249251765] [2021-06-05 04:08:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:21,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:21,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249251765] [2021-06-05 04:08:21,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249251765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:21,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426100702] [2021-06-05 04:08:21,867 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:21,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:08:21,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:21,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:08:21,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:22,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426100702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:22,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:22,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:08:22,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520122501] [2021-06-05 04:08:22,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:08:22,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:22,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:08:22,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:22,121 INFO L87 Difference]: Start difference. First operand 138281 states and 509043 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:23,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:23,609 INFO L93 Difference]: Finished difference Result 138841 states and 510581 transitions. [2021-06-05 04:08:23,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:08:23,610 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:08:23,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:24,375 INFO L225 Difference]: With dead ends: 138841 [2021-06-05 04:08:24,375 INFO L226 Difference]: Without dead ends: 138765 [2021-06-05 04:08:24,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:08:24,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138765 states. [2021-06-05 04:08:26,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138765 to 138390. [2021-06-05 04:08:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138390 states, 138389 states have (on average 3.6810729176451886) internal successors, (509420), 138389 states have internal predecessors, (509420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138390 states to 138390 states and 509420 transitions. [2021-06-05 04:08:27,591 INFO L78 Accepts]: Start accepts. Automaton has 138390 states and 509420 transitions. Word has length 33 [2021-06-05 04:08:27,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:27,591 INFO L482 AbstractCegarLoop]: Abstraction has 138390 states and 509420 transitions. [2021-06-05 04:08:27,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:27,591 INFO L276 IsEmpty]: Start isEmpty. Operand 138390 states and 509420 transitions. [2021-06-05 04:08:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:08:27,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:27,860 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:28,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 04:08:28,060 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:28,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:28,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1744422478, now seen corresponding path program 186 times [2021-06-05 04:08:28,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:28,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137460685] [2021-06-05 04:08:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:28,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:28,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137460685] [2021-06-05 04:08:28,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137460685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:28,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473576203] [2021-06-05 04:08:28,143 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:28,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:08:28,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:28,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:08:28,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:28,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473576203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:28,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:28,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:08:28,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678629495] [2021-06-05 04:08:28,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:08:28,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:28,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:08:28,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:08:28,377 INFO L87 Difference]: Start difference. First operand 138390 states and 509420 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:29,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:29,816 INFO L93 Difference]: Finished difference Result 139561 states and 512775 transitions. [2021-06-05 04:08:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:08:29,816 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:08:29,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:30,238 INFO L225 Difference]: With dead ends: 139561 [2021-06-05 04:08:30,238 INFO L226 Difference]: Without dead ends: 139512 [2021-06-05 04:08:30,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:08:30,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139512 states. [2021-06-05 04:08:32,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139512 to 138609. [2021-06-05 04:08:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138609 states, 138608 states have (on average 3.681490245873254) internal successors, (510284), 138608 states have internal predecessors, (510284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138609 states to 138609 states and 510284 transitions. [2021-06-05 04:08:33,097 INFO L78 Accepts]: Start accepts. Automaton has 138609 states and 510284 transitions. Word has length 33 [2021-06-05 04:08:33,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:33,097 INFO L482 AbstractCegarLoop]: Abstraction has 138609 states and 510284 transitions. [2021-06-05 04:08:33,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:33,097 INFO L276 IsEmpty]: Start isEmpty. Operand 138609 states and 510284 transitions. [2021-06-05 04:08:33,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:08:33,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:33,893 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:34,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:34,117 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:34,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1200847454, now seen corresponding path program 187 times [2021-06-05 04:08:34,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:34,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629973503] [2021-06-05 04:08:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:34,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:34,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629973503] [2021-06-05 04:08:34,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629973503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:34,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634631281] [2021-06-05 04:08:34,195 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:34,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:08:34,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:34,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634631281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:34,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:34,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:08:34,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212594113] [2021-06-05 04:08:34,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:08:34,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:34,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:08:34,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:34,437 INFO L87 Difference]: Start difference. First operand 138609 states and 510284 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:35,459 INFO L93 Difference]: Finished difference Result 139165 states and 511834 transitions. [2021-06-05 04:08:35,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:08:35,461 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:08:35,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:36,317 INFO L225 Difference]: With dead ends: 139165 [2021-06-05 04:08:36,318 INFO L226 Difference]: Without dead ends: 139021 [2021-06-05 04:08:36,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:08:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139021 states. [2021-06-05 04:08:38,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139021 to 138669. [2021-06-05 04:08:38,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138669 states, 138668 states have (on average 3.6814261401332677) internal successors, (510496), 138668 states have internal predecessors, (510496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138669 states to 138669 states and 510496 transitions. [2021-06-05 04:08:39,433 INFO L78 Accepts]: Start accepts. Automaton has 138669 states and 510496 transitions. Word has length 33 [2021-06-05 04:08:39,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:39,433 INFO L482 AbstractCegarLoop]: Abstraction has 138669 states and 510496 transitions. [2021-06-05 04:08:39,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:39,433 INFO L276 IsEmpty]: Start isEmpty. Operand 138669 states and 510496 transitions. [2021-06-05 04:08:39,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:08:39,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:39,745 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:39,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,190 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:39,957 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:39,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:39,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1938066470, now seen corresponding path program 188 times [2021-06-05 04:08:39,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:39,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119550231] [2021-06-05 04:08:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:39,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:08:40,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:40,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119550231] [2021-06-05 04:08:40,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119550231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:40,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438081627] [2021-06-05 04:08:40,033 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:40,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:08:40,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:40,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:08:40,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:40,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438081627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:40,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:40,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:08:40,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904655743] [2021-06-05 04:08:40,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:08:40,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:40,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:08:40,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:40,255 INFO L87 Difference]: Start difference. First operand 138669 states and 510496 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:41,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:41,626 INFO L93 Difference]: Finished difference Result 139131 states and 511744 transitions. [2021-06-05 04:08:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:08:41,627 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:08:41,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:42,034 INFO L225 Difference]: With dead ends: 139131 [2021-06-05 04:08:42,034 INFO L226 Difference]: Without dead ends: 139071 [2021-06-05 04:08:42,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 251.3ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:08:42,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139071 states. [2021-06-05 04:08:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139071 to 138677. [2021-06-05 04:08:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138677 states, 138676 states have (on average 3.681415673945023) internal successors, (510524), 138676 states have internal predecessors, (510524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138677 states to 138677 states and 510524 transitions. [2021-06-05 04:08:45,018 INFO L78 Accepts]: Start accepts. Automaton has 138677 states and 510524 transitions. Word has length 33 [2021-06-05 04:08:45,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:45,018 INFO L482 AbstractCegarLoop]: Abstraction has 138677 states and 510524 transitions. [2021-06-05 04:08:45,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:45,018 INFO L276 IsEmpty]: Start isEmpty. Operand 138677 states and 510524 transitions. [2021-06-05 04:08:45,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:08:45,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:45,803 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:46,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:46,003 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:46,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:46,003 INFO L82 PathProgramCache]: Analyzing trace with hash -267308122, now seen corresponding path program 189 times [2021-06-05 04:08:46,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:46,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020394845] [2021-06-05 04:08:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:46,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:46,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020394845] [2021-06-05 04:08:46,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020394845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:46,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556327860] [2021-06-05 04:08:46,081 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:46,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:08:46,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:46,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:08:46,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:46,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556327860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:46,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:46,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:08:46,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451062253] [2021-06-05 04:08:46,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:08:46,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:46,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:08:46,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:46,325 INFO L87 Difference]: Start difference. First operand 138677 states and 510524 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:47,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:47,206 INFO L93 Difference]: Finished difference Result 139123 states and 511717 transitions. [2021-06-05 04:08:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:08:47,206 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:08:47,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:47,624 INFO L225 Difference]: With dead ends: 139123 [2021-06-05 04:08:47,624 INFO L226 Difference]: Without dead ends: 138985 [2021-06-05 04:08:47,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:08:48,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138985 states. [2021-06-05 04:08:50,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138985 to 138765. [2021-06-05 04:08:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138765 states, 138764 states have (on average 3.68086103023839) internal successors, (510771), 138764 states have internal predecessors, (510771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:51,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138765 states to 138765 states and 510771 transitions. [2021-06-05 04:08:51,113 INFO L78 Accepts]: Start accepts. Automaton has 138765 states and 510771 transitions. Word has length 33 [2021-06-05 04:08:51,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:51,114 INFO L482 AbstractCegarLoop]: Abstraction has 138765 states and 510771 transitions. [2021-06-05 04:08:51,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:51,114 INFO L276 IsEmpty]: Start isEmpty. Operand 138765 states and 510771 transitions. [2021-06-05 04:08:51,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:08:51,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:51,383 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:51,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:51,583 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:51,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:51,583 INFO L82 PathProgramCache]: Analyzing trace with hash 200090734, now seen corresponding path program 190 times [2021-06-05 04:08:51,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:51,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853904042] [2021-06-05 04:08:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:51,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:51,660 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:51,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:51,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853904042] [2021-06-05 04:08:51,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853904042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:51,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225494009] [2021-06-05 04:08:51,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:51,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:08:51,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:51,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:08:51,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:51,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225494009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:51,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:51,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:08:51,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588888832] [2021-06-05 04:08:51,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:08:51,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:51,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:08:51,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:51,890 INFO L87 Difference]: Start difference. First operand 138765 states and 510771 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:53,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:53,387 INFO L93 Difference]: Finished difference Result 139574 states and 513100 transitions. [2021-06-05 04:08:53,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:08:53,387 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:08:53,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:53,778 INFO L225 Difference]: With dead ends: 139574 [2021-06-05 04:08:53,778 INFO L226 Difference]: Without dead ends: 139455 [2021-06-05 04:08:53,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:08:53,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139455 states. [2021-06-05 04:08:56,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139455 to 139022. [2021-06-05 04:08:56,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139022 states, 139021 states have (on average 3.680530279598046) internal successors, (511671), 139021 states have internal predecessors, (511671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139022 states to 139022 states and 511671 transitions. [2021-06-05 04:08:56,771 INFO L78 Accepts]: Start accepts. Automaton has 139022 states and 511671 transitions. Word has length 33 [2021-06-05 04:08:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:56,771 INFO L482 AbstractCegarLoop]: Abstraction has 139022 states and 511671 transitions. [2021-06-05 04:08:56,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 139022 states and 511671 transitions. [2021-06-05 04:08:57,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:08:57,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:57,046 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:57,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:57,246 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:57,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:57,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1065307430, now seen corresponding path program 191 times [2021-06-05 04:08:57,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:57,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474865669] [2021-06-05 04:08:57,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:08:57,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:57,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474865669] [2021-06-05 04:08:57,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474865669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:57,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450493847] [2021-06-05 04:08:57,325 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:57,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:08:57,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:08:57,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:08:57,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:58,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450493847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:58,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:58,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:08:58,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362666515] [2021-06-05 04:08:58,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:08:58,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:58,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:08:58,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:08:58,085 INFO L87 Difference]: Start difference. First operand 139022 states and 511671 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:08:59,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:59,104 INFO L93 Difference]: Finished difference Result 139748 states and 513678 transitions. [2021-06-05 04:08:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:08:59,105 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:08:59,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:59,513 INFO L225 Difference]: With dead ends: 139748 [2021-06-05 04:08:59,513 INFO L226 Difference]: Without dead ends: 139613 [2021-06-05 04:08:59,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 777.5ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:09:00,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139613 states. [2021-06-05 04:09:02,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139613 to 139152. [2021-06-05 04:09:02,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139152 states, 139151 states have (on average 3.6803544351100603) internal successors, (512125), 139151 states have internal predecessors, (512125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:03,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139152 states to 139152 states and 512125 transitions. [2021-06-05 04:09:03,063 INFO L78 Accepts]: Start accepts. Automaton has 139152 states and 512125 transitions. Word has length 33 [2021-06-05 04:09:03,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:03,063 INFO L482 AbstractCegarLoop]: Abstraction has 139152 states and 512125 transitions. [2021-06-05 04:09:03,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:03,064 INFO L276 IsEmpty]: Start isEmpty. Operand 139152 states and 512125 transitions. [2021-06-05 04:09:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:09:03,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:03,339 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:03,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 04:09:03,540 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:03,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:03,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2130130398, now seen corresponding path program 192 times [2021-06-05 04:09:03,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:03,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337586096] [2021-06-05 04:09:03,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:03,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:03,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337586096] [2021-06-05 04:09:03,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337586096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:03,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659955699] [2021-06-05 04:09:03,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:03,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:09:03,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:03,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:09:03,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:03,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659955699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:03,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:03,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:09:03,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911544457] [2021-06-05 04:09:03,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:09:03,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:03,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:09:03,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:09:03,837 INFO L87 Difference]: Start difference. First operand 139152 states and 512125 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:05,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:05,202 INFO L93 Difference]: Finished difference Result 139830 states and 514036 transitions. [2021-06-05 04:09:05,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:09:05,202 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:09:05,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:05,630 INFO L225 Difference]: With dead ends: 139830 [2021-06-05 04:09:05,630 INFO L226 Difference]: Without dead ends: 139671 [2021-06-05 04:09:05,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 248.1ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:09:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139671 states. [2021-06-05 04:09:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139671 to 139307. [2021-06-05 04:09:08,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139307 states, 139306 states have (on average 3.6801071023502216) internal successors, (512661), 139306 states have internal predecessors, (512661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139307 states to 139307 states and 512661 transitions. [2021-06-05 04:09:08,602 INFO L78 Accepts]: Start accepts. Automaton has 139307 states and 512661 transitions. Word has length 33 [2021-06-05 04:09:08,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:08,602 INFO L482 AbstractCegarLoop]: Abstraction has 139307 states and 512661 transitions. [2021-06-05 04:09:08,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:08,602 INFO L276 IsEmpty]: Start isEmpty. Operand 139307 states and 512661 transitions. [2021-06-05 04:09:08,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:09:08,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:08,866 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:09,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 04:09:09,066 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:09,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:09,067 INFO L82 PathProgramCache]: Analyzing trace with hash -735597726, now seen corresponding path program 193 times [2021-06-05 04:09:09,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:09,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885801442] [2021-06-05 04:09:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:09,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:09,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885801442] [2021-06-05 04:09:09,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885801442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:09,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049987] [2021-06-05 04:09:09,139 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:09,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:09:09,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:09,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:09,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:09,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:09:09,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853686846] [2021-06-05 04:09:09,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:09:09,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:09,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:09:09,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:09:09,924 INFO L87 Difference]: Start difference. First operand 139307 states and 512661 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:11,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:11,129 INFO L93 Difference]: Finished difference Result 139982 states and 514553 transitions. [2021-06-05 04:09:11,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:09:11,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:09:11,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:11,579 INFO L225 Difference]: With dead ends: 139982 [2021-06-05 04:09:11,579 INFO L226 Difference]: Without dead ends: 139865 [2021-06-05 04:09:11,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 275.8ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:09:11,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139865 states. [2021-06-05 04:09:13,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139865 to 139533. [2021-06-05 04:09:14,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139533 states, 139532 states have (on average 3.679306539001806) internal successors, (513381), 139532 states have internal predecessors, (513381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:14,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139533 states to 139533 states and 513381 transitions. [2021-06-05 04:09:14,513 INFO L78 Accepts]: Start accepts. Automaton has 139533 states and 513381 transitions. Word has length 33 [2021-06-05 04:09:14,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:14,513 INFO L482 AbstractCegarLoop]: Abstraction has 139533 states and 513381 transitions. [2021-06-05 04:09:14,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:14,514 INFO L276 IsEmpty]: Start isEmpty. Operand 139533 states and 513381 transitions. [2021-06-05 04:09:14,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:09:14,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:14,782 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:14,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 04:09:14,982 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:14,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:14,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1657385434, now seen corresponding path program 194 times [2021-06-05 04:09:14,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:14,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612058348] [2021-06-05 04:09:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:14,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:15,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:15,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612058348] [2021-06-05 04:09:15,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612058348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:15,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354216341] [2021-06-05 04:09:15,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:15,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:09:15,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:15,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:09:15,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:15,581 WARN L205 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-05 04:09:15,843 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:15,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354216341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:15,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:15,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:09:15,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141265022] [2021-06-05 04:09:15,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:09:15,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:15,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:09:15,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:09:15,844 INFO L87 Difference]: Start difference. First operand 139533 states and 513381 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:16,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:16,830 INFO L93 Difference]: Finished difference Result 141165 states and 518167 transitions. [2021-06-05 04:09:16,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:09:16,830 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:09:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:17,223 INFO L225 Difference]: With dead ends: 141165 [2021-06-05 04:09:17,223 INFO L226 Difference]: Without dead ends: 141103 [2021-06-05 04:09:17,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 321.9ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:09:17,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141103 states. [2021-06-05 04:09:19,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141103 to 139884. [2021-06-05 04:09:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139884 states, 139883 states have (on average 3.679267673698734) internal successors, (514667), 139883 states have internal predecessors, (514667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:20,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139884 states to 139884 states and 514667 transitions. [2021-06-05 04:09:20,735 INFO L78 Accepts]: Start accepts. Automaton has 139884 states and 514667 transitions. Word has length 33 [2021-06-05 04:09:20,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:20,735 INFO L482 AbstractCegarLoop]: Abstraction has 139884 states and 514667 transitions. [2021-06-05 04:09:20,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:20,736 INFO L276 IsEmpty]: Start isEmpty. Operand 139884 states and 514667 transitions. [2021-06-05 04:09:21,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:09:21,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:21,008 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:21,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 04:09:21,209 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:21,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:21,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1417347430, now seen corresponding path program 195 times [2021-06-05 04:09:21,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:21,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138598474] [2021-06-05 04:09:21,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:21,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:21,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138598474] [2021-06-05 04:09:21,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138598474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:21,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934423965] [2021-06-05 04:09:21,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:21,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:09:21,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:21,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:09:21,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:21,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934423965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:21,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:21,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:09:21,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848408251] [2021-06-05 04:09:21,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:09:21,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:21,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:09:21,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:09:21,530 INFO L87 Difference]: Start difference. First operand 139884 states and 514667 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:22,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:22,928 INFO L93 Difference]: Finished difference Result 140326 states and 515929 transitions. [2021-06-05 04:09:22,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:09:22,929 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:09:22,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:23,362 INFO L225 Difference]: With dead ends: 140326 [2021-06-05 04:09:23,362 INFO L226 Difference]: Without dead ends: 140276 [2021-06-05 04:09:23,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:09:23,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140276 states. [2021-06-05 04:09:25,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140276 to 139952. [2021-06-05 04:09:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139952 states, 139951 states have (on average 3.678951918885896) internal successors, (514873), 139951 states have internal predecessors, (514873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:26,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139952 states to 139952 states and 514873 transitions. [2021-06-05 04:09:26,257 INFO L78 Accepts]: Start accepts. Automaton has 139952 states and 514873 transitions. Word has length 33 [2021-06-05 04:09:26,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:26,257 INFO L482 AbstractCegarLoop]: Abstraction has 139952 states and 514873 transitions. [2021-06-05 04:09:26,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:26,257 INFO L276 IsEmpty]: Start isEmpty. Operand 139952 states and 514873 transitions. [2021-06-05 04:09:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:09:26,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:26,535 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:26,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 04:09:26,736 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:26,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:26,736 INFO L82 PathProgramCache]: Analyzing trace with hash 895266654, now seen corresponding path program 196 times [2021-06-05 04:09:26,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:26,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583458634] [2021-06-05 04:09:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:26,814 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:26,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:26,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583458634] [2021-06-05 04:09:26,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583458634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:26,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567822969] [2021-06-05 04:09:26,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:26,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:09:26,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:26,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:09:26,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:27,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567822969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:27,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:27,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:09:27,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619547335] [2021-06-05 04:09:27,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:09:27,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:27,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:09:27,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:09:27,553 INFO L87 Difference]: Start difference. First operand 139952 states and 514873 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:28,437 INFO L93 Difference]: Finished difference Result 140618 states and 516769 transitions. [2021-06-05 04:09:28,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:09:28,437 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:09:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:28,834 INFO L225 Difference]: With dead ends: 140618 [2021-06-05 04:09:28,834 INFO L226 Difference]: Without dead ends: 140564 [2021-06-05 04:09:28,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 774.9ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:09:28,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140564 states. [2021-06-05 04:09:31,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140564 to 140192. [2021-06-05 04:09:31,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140192 states, 140191 states have (on average 3.678417302109265) internal successors, (515681), 140191 states have internal predecessors, (515681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140192 states to 140192 states and 515681 transitions. [2021-06-05 04:09:32,371 INFO L78 Accepts]: Start accepts. Automaton has 140192 states and 515681 transitions. Word has length 33 [2021-06-05 04:09:32,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:32,371 INFO L482 AbstractCegarLoop]: Abstraction has 140192 states and 515681 transitions. [2021-06-05 04:09:32,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:32,371 INFO L276 IsEmpty]: Start isEmpty. Operand 140192 states and 515681 transitions. [2021-06-05 04:09:32,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:09:32,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:32,665 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:32,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:32,865 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:32,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:32,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1622610462, now seen corresponding path program 197 times [2021-06-05 04:09:32,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:32,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087241565] [2021-06-05 04:09:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:32,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:32,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087241565] [2021-06-05 04:09:32,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087241565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:32,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835207924] [2021-06-05 04:09:32,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:32,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:09:32,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:32,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:09:32,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:33,172 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:33,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835207924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:33,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:33,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:09:33,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504265291] [2021-06-05 04:09:33,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:09:33,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:33,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:09:33,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:09:33,173 INFO L87 Difference]: Start difference. First operand 140192 states and 515681 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:34,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:34,702 INFO L93 Difference]: Finished difference Result 140843 states and 517403 transitions. [2021-06-05 04:09:34,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:09:34,703 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:09:34,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:35,084 INFO L225 Difference]: With dead ends: 140843 [2021-06-05 04:09:35,085 INFO L226 Difference]: Without dead ends: 140669 [2021-06-05 04:09:35,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:09:35,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140669 states. [2021-06-05 04:09:37,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140669 to 140316. [2021-06-05 04:09:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140316 states, 140315 states have (on average 3.677710864839825) internal successors, (516038), 140315 states have internal predecessors, (516038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:38,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140316 states to 140316 states and 516038 transitions. [2021-06-05 04:09:38,022 INFO L78 Accepts]: Start accepts. Automaton has 140316 states and 516038 transitions. Word has length 33 [2021-06-05 04:09:38,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:38,023 INFO L482 AbstractCegarLoop]: Abstraction has 140316 states and 516038 transitions. [2021-06-05 04:09:38,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:38,023 INFO L276 IsEmpty]: Start isEmpty. Operand 140316 states and 516038 transitions. [2021-06-05 04:09:38,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:09:38,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:38,297 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:38,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 04:09:38,497 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:38,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:38,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1470122842, now seen corresponding path program 198 times [2021-06-05 04:09:38,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:38,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339863479] [2021-06-05 04:09:38,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:38,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:38,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:38,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339863479] [2021-06-05 04:09:38,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339863479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:38,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440735580] [2021-06-05 04:09:38,587 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:38,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:09:38,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:38,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:09:38,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:39,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440735580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:39,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:39,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:09:39,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241915793] [2021-06-05 04:09:39,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:09:39,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:39,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:09:39,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:09:39,324 INFO L87 Difference]: Start difference. First operand 140316 states and 516038 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:40,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:40,331 INFO L93 Difference]: Finished difference Result 140829 states and 517484 transitions. [2021-06-05 04:09:40,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:09:40,332 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:09:40,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:40,730 INFO L225 Difference]: With dead ends: 140829 [2021-06-05 04:09:40,730 INFO L226 Difference]: Without dead ends: 140771 [2021-06-05 04:09:40,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 267.2ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:09:40,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140771 states. [2021-06-05 04:09:43,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140771 to 140394. [2021-06-05 04:09:43,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140394 states, 140393 states have (on average 3.6776477459702406) internal successors, (516316), 140393 states have internal predecessors, (516316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140394 states to 140394 states and 516316 transitions. [2021-06-05 04:09:44,292 INFO L78 Accepts]: Start accepts. Automaton has 140394 states and 516316 transitions. Word has length 33 [2021-06-05 04:09:44,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:44,292 INFO L482 AbstractCegarLoop]: Abstraction has 140394 states and 516316 transitions. [2021-06-05 04:09:44,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:44,292 INFO L276 IsEmpty]: Start isEmpty. Operand 140394 states and 516316 transitions. [2021-06-05 04:09:44,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:09:44,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:44,579 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:44,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 04:09:44,780 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:44,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1002723986, now seen corresponding path program 199 times [2021-06-05 04:09:44,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:44,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194515997] [2021-06-05 04:09:44,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:44,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:44,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194515997] [2021-06-05 04:09:44,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194515997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:44,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768558465] [2021-06-05 04:09:44,859 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:44,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:09:44,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:45,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768558465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:45,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:45,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:09:45,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218670380] [2021-06-05 04:09:45,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:09:45,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:45,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:09:45,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:09:45,097 INFO L87 Difference]: Start difference. First operand 140394 states and 516316 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:46,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:46,672 INFO L93 Difference]: Finished difference Result 141007 states and 518078 transitions. [2021-06-05 04:09:46,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:09:46,672 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:09:46,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:47,067 INFO L225 Difference]: With dead ends: 141007 [2021-06-05 04:09:47,067 INFO L226 Difference]: Without dead ends: 140955 [2021-06-05 04:09:47,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:09:47,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140955 states. [2021-06-05 04:09:49,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140955 to 140436. [2021-06-05 04:09:49,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140436 states, 140435 states have (on average 3.677658703314701) internal successors, (516472), 140435 states have internal predecessors, (516472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140436 states to 140436 states and 516472 transitions. [2021-06-05 04:09:50,020 INFO L78 Accepts]: Start accepts. Automaton has 140436 states and 516472 transitions. Word has length 33 [2021-06-05 04:09:50,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:50,021 INFO L482 AbstractCegarLoop]: Abstraction has 140436 states and 516472 transitions. [2021-06-05 04:09:50,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:50,021 INFO L276 IsEmpty]: Start isEmpty. Operand 140436 states and 516472 transitions. [2021-06-05 04:09:50,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:09:50,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:50,279 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:50,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:50,480 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:50,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:50,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1018546082, now seen corresponding path program 200 times [2021-06-05 04:09:50,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:50,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968812065] [2021-06-05 04:09:50,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:09:50,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:50,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968812065] [2021-06-05 04:09:50,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968812065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:50,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884139515] [2021-06-05 04:09:50,552 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:50,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:09:50,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:50,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:09:50,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:50,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884139515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:50,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:50,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 19 [2021-06-05 04:09:50,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242448711] [2021-06-05 04:09:50,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:09:50,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:50,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:09:50,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:09:50,773 INFO L87 Difference]: Start difference. First operand 140436 states and 516472 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:52,144 INFO L93 Difference]: Finished difference Result 140940 states and 517912 transitions. [2021-06-05 04:09:52,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:09:52,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:09:52,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:52,588 INFO L225 Difference]: With dead ends: 140940 [2021-06-05 04:09:52,588 INFO L226 Difference]: Without dead ends: 140791 [2021-06-05 04:09:52,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:09:52,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140791 states. [2021-06-05 04:09:55,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140791 to 140572. [2021-06-05 04:09:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140572 states, 140571 states have (on average 3.6772093817359197) internal successors, (516909), 140571 states have internal predecessors, (516909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140572 states to 140572 states and 516909 transitions. [2021-06-05 04:09:56,184 INFO L78 Accepts]: Start accepts. Automaton has 140572 states and 516909 transitions. Word has length 33 [2021-06-05 04:09:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:56,185 INFO L482 AbstractCegarLoop]: Abstraction has 140572 states and 516909 transitions. [2021-06-05 04:09:56,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:56,185 INFO L276 IsEmpty]: Start isEmpty. Operand 140572 states and 516909 transitions. [2021-06-05 04:09:56,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:09:56,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:56,881 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:57,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:57,089 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:57,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:57,089 INFO L82 PathProgramCache]: Analyzing trace with hash -137507290, now seen corresponding path program 201 times [2021-06-05 04:09:57,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:57,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754194710] [2021-06-05 04:09:57,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:09:57,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:57,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754194710] [2021-06-05 04:09:57,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754194710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:57,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006570382] [2021-06-05 04:09:57,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:57,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:09:57,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:57,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:09:57,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:57,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006570382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:57,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:57,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:09:57,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108055002] [2021-06-05 04:09:57,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:09:57,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:57,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:09:57,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:09:57,443 INFO L87 Difference]: Start difference. First operand 140572 states and 516909 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:09:58,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:58,566 INFO L93 Difference]: Finished difference Result 141721 states and 520339 transitions. [2021-06-05 04:09:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:09:58,566 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:09:58,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:59,007 INFO L225 Difference]: With dead ends: 141721 [2021-06-05 04:09:59,007 INFO L226 Difference]: Without dead ends: 141659 [2021-06-05 04:09:59,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:09:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141659 states. [2021-06-05 04:10:01,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141659 to 140853. [2021-06-05 04:10:01,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140853 states, 140852 states have (on average 3.6771717831482693) internal successors, (517937), 140852 states have internal predecessors, (517937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:02,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140853 states to 140853 states and 517937 transitions. [2021-06-05 04:10:02,689 INFO L78 Accepts]: Start accepts. Automaton has 140853 states and 517937 transitions. Word has length 33 [2021-06-05 04:10:02,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:02,689 INFO L482 AbstractCegarLoop]: Abstraction has 140853 states and 517937 transitions. [2021-06-05 04:10:02,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand 140853 states and 517937 transitions. [2021-06-05 04:10:02,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:10:02,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:02,989 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:03,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:03,205 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:03,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1938412446, now seen corresponding path program 202 times [2021-06-05 04:10:03,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:03,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196443572] [2021-06-05 04:10:03,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:10:03,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:03,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196443572] [2021-06-05 04:10:03,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196443572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:03,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942453521] [2021-06-05 04:10:03,299 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:03,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:10:03,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:03,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:10:03,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:03,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942453521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:03,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:03,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:10:03,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116107683] [2021-06-05 04:10:03,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:10:03,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:03,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:10:03,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:10:03,581 INFO L87 Difference]: Start difference. First operand 140853 states and 517937 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:05,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:05,084 INFO L93 Difference]: Finished difference Result 141638 states and 520235 transitions. [2021-06-05 04:10:05,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:10:05,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:10:05,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:05,540 INFO L225 Difference]: With dead ends: 141638 [2021-06-05 04:10:05,540 INFO L226 Difference]: Without dead ends: 141485 [2021-06-05 04:10:05,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:10:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141485 states. [2021-06-05 04:10:08,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141485 to 141159. [2021-06-05 04:10:08,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141159 states, 141158 states have (on average 3.6762422250244406) internal successors, (518931), 141158 states have internal predecessors, (518931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141159 states to 141159 states and 518931 transitions. [2021-06-05 04:10:08,691 INFO L78 Accepts]: Start accepts. Automaton has 141159 states and 518931 transitions. Word has length 33 [2021-06-05 04:10:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:08,691 INFO L482 AbstractCegarLoop]: Abstraction has 141159 states and 518931 transitions. [2021-06-05 04:10:08,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 141159 states and 518931 transitions. [2021-06-05 04:10:09,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:10:09,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:09,488 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:09,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:09,703 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:09,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:09,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1434767142, now seen corresponding path program 203 times [2021-06-05 04:10:09,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:09,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731899243] [2021-06-05 04:10:09,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:09,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:09,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731899243] [2021-06-05 04:10:09,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731899243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:09,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786790823] [2021-06-05 04:10:09,801 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:09,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:10:09,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:09,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:10:09,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:10,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786790823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:10,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:10,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:10:10,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995683122] [2021-06-05 04:10:10,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:10:10,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:10,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:10:10,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:10:10,049 INFO L87 Difference]: Start difference. First operand 141159 states and 518931 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:11,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:11,144 INFO L93 Difference]: Finished difference Result 142967 states and 524363 transitions. [2021-06-05 04:10:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:10:11,144 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:10:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:12,015 INFO L225 Difference]: With dead ends: 142967 [2021-06-05 04:10:12,015 INFO L226 Difference]: Without dead ends: 142905 [2021-06-05 04:10:12,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 298.4ms TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:10:12,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142905 states. [2021-06-05 04:10:14,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142905 to 141282. [2021-06-05 04:10:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141282 states, 141281 states have (on average 3.6763329817880677) internal successors, (519396), 141281 states have internal predecessors, (519396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141282 states to 141282 states and 519396 transitions. [2021-06-05 04:10:15,150 INFO L78 Accepts]: Start accepts. Automaton has 141282 states and 519396 transitions. Word has length 33 [2021-06-05 04:10:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:15,150 INFO L482 AbstractCegarLoop]: Abstraction has 141282 states and 519396 transitions. [2021-06-05 04:10:15,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 141282 states and 519396 transitions. [2021-06-05 04:10:15,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:10:15,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:15,440 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:15,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 04:10:15,650 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:15,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:15,650 INFO L82 PathProgramCache]: Analyzing trace with hash -845756646, now seen corresponding path program 204 times [2021-06-05 04:10:15,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:15,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740123914] [2021-06-05 04:10:15,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:15,737 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:15,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:15,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740123914] [2021-06-05 04:10:15,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740123914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:15,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556268772] [2021-06-05 04:10:15,737 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:15,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:10:15,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:15,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:10:15,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:15,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556268772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:15,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:15,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:10:15,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200141320] [2021-06-05 04:10:15,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:10:15,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:15,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:10:15,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:10:15,971 INFO L87 Difference]: Start difference. First operand 141282 states and 519396 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:17,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:17,475 INFO L93 Difference]: Finished difference Result 142385 states and 522684 transitions. [2021-06-05 04:10:17,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:10:17,475 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:10:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:17,892 INFO L225 Difference]: With dead ends: 142385 [2021-06-05 04:10:17,892 INFO L226 Difference]: Without dead ends: 142345 [2021-06-05 04:10:17,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:10:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142345 states. [2021-06-05 04:10:20,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142345 to 141544. [2021-06-05 04:10:20,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141544 states, 141543 states have (on average 3.6762538592512524) internal successors, (520348), 141543 states have internal predecessors, (520348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141544 states to 141544 states and 520348 transitions. [2021-06-05 04:10:20,991 INFO L78 Accepts]: Start accepts. Automaton has 141544 states and 520348 transitions. Word has length 33 [2021-06-05 04:10:20,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:20,992 INFO L482 AbstractCegarLoop]: Abstraction has 141544 states and 520348 transitions. [2021-06-05 04:10:20,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:20,992 INFO L276 IsEmpty]: Start isEmpty. Operand 141544 states and 520348 transitions. [2021-06-05 04:10:21,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:10:21,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:21,846 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:22,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 04:10:22,057 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:22,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:22,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1736447074, now seen corresponding path program 205 times [2021-06-05 04:10:22,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:22,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079284861] [2021-06-05 04:10:22,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:22,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:22,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079284861] [2021-06-05 04:10:22,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079284861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:22,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641719880] [2021-06-05 04:10:22,152 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:22,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:22,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:10:22,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:22,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641719880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:22,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:22,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-05 04:10:22,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628599758] [2021-06-05 04:10:22,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:10:22,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:22,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:10:22,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:10:22,397 INFO L87 Difference]: Start difference. First operand 141544 states and 520348 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:23,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:23,382 INFO L93 Difference]: Finished difference Result 142511 states and 523171 transitions. [2021-06-05 04:10:23,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:10:23,384 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:10:23,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:24,348 INFO L225 Difference]: With dead ends: 142511 [2021-06-05 04:10:24,348 INFO L226 Difference]: Without dead ends: 142368 [2021-06-05 04:10:24,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 273.1ms TimeCoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:10:24,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142368 states. [2021-06-05 04:10:26,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142368 to 141808. [2021-06-05 04:10:26,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141808 states, 141807 states have (on average 3.67581290063255) internal successors, (521256), 141807 states have internal predecessors, (521256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:27,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141808 states to 141808 states and 521256 transitions. [2021-06-05 04:10:27,529 INFO L78 Accepts]: Start accepts. Automaton has 141808 states and 521256 transitions. Word has length 33 [2021-06-05 04:10:27,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:27,529 INFO L482 AbstractCegarLoop]: Abstraction has 141808 states and 521256 transitions. [2021-06-05 04:10:27,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:27,529 INFO L276 IsEmpty]: Start isEmpty. Operand 141808 states and 521256 transitions. [2021-06-05 04:10:27,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 04:10:27,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:27,815 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:28,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 04:10:28,025 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:28,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:28,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1483795810, now seen corresponding path program 206 times [2021-06-05 04:10:28,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:28,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295494988] [2021-06-05 04:10:28,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:28,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:28,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295494988] [2021-06-05 04:10:28,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295494988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:28,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261133124] [2021-06-05 04:10:28,128 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:28,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:10:28,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:28,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:10:28,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:28,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261133124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:28,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:28,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-06-05 04:10:28,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146489269] [2021-06-05 04:10:28,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:10:28,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:28,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:10:28,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:10:28,418 INFO L87 Difference]: Start difference. First operand 141808 states and 521256 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:10:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:30,104 INFO L93 Difference]: Finished difference Result 143447 states and 526111 transitions. [2021-06-05 04:10:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:10:30,105 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 04:10:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:30,552 INFO L225 Difference]: With dead ends: 143447 [2021-06-05 04:10:30,552 INFO L226 Difference]: Without dead ends: 143318 [2021-06-05 04:10:30,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 314.2ms TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:10:30,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143318 states. Received shutdown request... [2021-06-05 04:10:31,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 04:10:31,510 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 04:10:31,512 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 04:10:31,513 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 04:10:31,513 INFO L202 PluginConnector]: Adding new model mult-flipped-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:10:31 BasicIcfg [2021-06-05 04:10:31,513 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 04:10:31,514 INFO L168 Benchmark]: Toolchain (without parser) took 704814.79 ms. Allocated memory was 436.2 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 415.3 MB in the beginning and 9.9 GB in the end (delta: -9.5 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. [2021-06-05 04:10:31,514 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 436.2 MB. Free memory is still 416.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:10:31,514 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.85 ms. Allocated memory is still 436.2 MB. Free memory was 415.3 MB in the beginning and 413.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:10:31,514 INFO L168 Benchmark]: Boogie Preprocessor took 12.14 ms. Allocated memory is still 436.2 MB. Free memory was 413.8 MB in the beginning and 412.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:10:31,514 INFO L168 Benchmark]: RCFGBuilder took 203.59 ms. Allocated memory is still 436.2 MB. Free memory was 412.8 MB in the beginning and 400.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 04:10:31,514 INFO L168 Benchmark]: TraceAbstraction took 704576.88 ms. Allocated memory was 436.2 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 399.8 MB in the beginning and 9.9 GB in the end (delta: -9.5 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. [2021-06-05 04:10:31,514 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 0.12 ms. Allocated memory is still 436.2 MB. Free memory is still 416.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.85 ms. Allocated memory is still 436.2 MB. Free memory was 415.3 MB in the beginning and 413.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.14 ms. Allocated memory is still 436.2 MB. Free memory was 413.8 MB in the beginning and 412.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 203.59 ms. Allocated memory is still 436.2 MB. Free memory was 412.8 MB in the beginning and 400.2 MB in the end (delta: 12.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 704576.88 ms. Allocated memory was 436.2 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 399.8 MB in the beginning and 9.9 GB in the end (delta: -9.5 GB). Peak memory consumption was 6.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 704495.6ms, OverallIterations: 215, TraceHistogramMax: 3, EmptinessCheckTime: 39976.3ms, AutomataDifference: 218952.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 36.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13249 SDtfs, 25959 SDslu, 138947 SDs, 0 SdLazy, 91715 SolverSat, 3961 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 34532.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9334 GetRequests, 4664 SyntacticMatches, 52 SemanticMatches, 4618 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34417 ImplicationChecksByTransitivity, 52331.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=141808occurred in iteration=214, InterpolantAutomatonStates: 3788, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 343520.9ms AutomataMinimizationTime, 215 MinimizatonAttempts, 702776 StatesRemovedByMinimization, 214 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 670.5ms SsaConstructionTime, 2534.0ms SatisfiabilityAnalysisTime, 50602.1ms InterpolantComputationTime, 12281 NumberOfCodeBlocks, 12265 NumberOfCodeBlocksAsserted, 807 NumberOfCheckSat, 11858 ConstructedInterpolants, 0 QuantifiedInterpolants, 162530 SizeOfPredicates, 884 NumberOfNonLiveVariables, 16933 ConjunctsInSsa, 3816 ConjunctsInUnsatCore, 423 InterpolantComputations, 7 PerfectInterpolantSequences, 817/7568 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