/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-dist.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 21:13:16,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 21:13:16,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 21:13:16,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 21:13:16,303 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 21:13:16,325 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 21:13:16,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 21:13:16,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 21:13:16,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 21:13:16,327 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 21:13:16,327 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 21:13:16,327 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 21:13:16,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 21:13:16,328 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 21:13:16,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 21:13:16,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 21:13:16,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 21:13:16,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 21:13:16,329 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 21:13:16,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 21:13:16,329 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 21:13:16,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 21:13:16,329 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 21:13:16,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 21:13:16,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 21:13:16,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 21:13:16,329 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 21:13:16,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 21:13:16,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 21:13:16,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 21:13:16,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 21:13:16,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 21:13:16,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 21:13:16,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 21:13:16,330 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 21:13:16,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 21:13:16,330 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 21:13:16,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 21:13:16,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 21:13:16,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 21:13:16,575 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 21:13:16,575 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 21:13:16,576 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl [2021-06-05 21:13:16,576 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-dist.wvr.bpl' [2021-06-05 21:13:16,675 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 21:13:16,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 21:13:16,677 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 21:13:16,677 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 21:13:16,677 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 21:13:16,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:16" (1/1) ... [2021-06-05 21:13:16,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:16" (1/1) ... [2021-06-05 21:13:16,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 21:13:16,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 21:13:16,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 21:13:16,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 21:13:16,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:16" (1/1) ... [2021-06-05 21:13:16,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:16" (1/1) ... [2021-06-05 21:13:16,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:16" (1/1) ... [2021-06-05 21:13:16,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:16" (1/1) ... [2021-06-05 21:13:16,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:16" (1/1) ... [2021-06-05 21:13:16,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:16" (1/1) ... [2021-06-05 21:13:16,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:16" (1/1) ... [2021-06-05 21:13:16,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 21:13:16,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 21:13:16,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 21:13:16,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 21:13:16,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:16" (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 21:13:16,763 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 21:13:16,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 21:13:16,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 21:13:16,764 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 21:13:16,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 21:13:16,764 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 21:13:16,764 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 21:13:16,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 21:13:16,764 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 21:13:16,764 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 21:13:16,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 21:13:16,765 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 21:13:16,766 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 21:13:16,962 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 21:13:16,963 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 21:13:16,964 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:13:16 BoogieIcfgContainer [2021-06-05 21:13:16,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 21:13:16,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 21:13:16,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 21:13:16,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 21:13:16,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 09:13:16" (1/2) ... [2021-06-05 21:13:16,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2478fe66 and model type mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 09:13:16, skipping insertion in model container [2021-06-05 21:13:16,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 09:13:16" (2/2) ... [2021-06-05 21:13:16,969 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.bpl [2021-06-05 21:13:16,972 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 21:13:16,972 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 21:13:16,972 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 21:13:16,973 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 21:13:16,998 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 21:13:17,011 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 21:13:17,028 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 21:13:17,028 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 21:13:17,028 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 21:13:17,028 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 21:13:17,028 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 21:13:17,028 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 21:13:17,028 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 21:13:17,028 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 21:13:17,033 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-06-05 21:13:17,072 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 21:13:17,074 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 21:13:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 21:13:17,079 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:17,079 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:17,079 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:17,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:17,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1660799360, now seen corresponding path program 1 times [2021-06-05 21:13:17,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:17,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718206813] [2021-06-05 21:13:17,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:17,278 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 21:13:17,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:17,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718206813] [2021-06-05 21:13:17,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718206813] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:13:17,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:13:17,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 21:13:17,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611830799] [2021-06-05 21:13:17,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 21:13:17,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:17,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 21:13:17,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:13:17,291 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 21:13:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:17,313 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-06-05 21:13:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 21:13:17,314 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 21:13:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:17,324 INFO L225 Difference]: With dead ends: 214 [2021-06-05 21:13:17,324 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 21:13:17,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 21:13:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 21:13:17,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-06-05 21:13:17,353 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 21:13:17,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-06-05 21:13:17,355 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-06-05 21:13:17,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:17,356 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-06-05 21:13:17,356 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 21:13:17,356 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-06-05 21:13:17,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:17,357 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:17,357 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:17,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 21:13:17,357 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:17,358 INFO L82 PathProgramCache]: Analyzing trace with hash 185723234, now seen corresponding path program 1 times [2021-06-05 21:13:17,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:17,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12929843] [2021-06-05 21:13:17,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:17,417 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 21:13:17,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:17,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12929843] [2021-06-05 21:13:17,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12929843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:17,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223094903] [2021-06-05 21:13:17,418 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 21:13:17,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:17,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 21:13:17,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:17,541 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 21:13:17,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223094903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:17,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:17,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-06-05 21:13:17,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194360607] [2021-06-05 21:13:17,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 21:13:17,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:17,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 21:13:17,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:13:17,545 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:17,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:17,703 INFO L93 Difference]: Finished difference Result 336 states and 940 transitions. [2021-06-05 21:13:17,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:13:17,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have 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 21:13:17,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:17,708 INFO L225 Difference]: With dead ends: 336 [2021-06-05 21:13:17,708 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 21:13:17,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:13:17,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 21:13:17,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 173. [2021-06-05 21:13:17,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 3.0) internal successors, (516), 172 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 516 transitions. [2021-06-05 21:13:17,734 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 516 transitions. Word has length 17 [2021-06-05 21:13:17,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:17,734 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 516 transitions. [2021-06-05 21:13:17,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:17,734 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 516 transitions. [2021-06-05 21:13:17,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:17,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:17,735 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:17,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 21:13:17,936 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:17,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:17,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1698446180, now seen corresponding path program 1 times [2021-06-05 21:13:17,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:17,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762282066] [2021-06-05 21:13:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:17,973 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 21:13:17,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:17,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762282066] [2021-06-05 21:13:17,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762282066] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:13:17,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:13:17,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:13:17,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852863416] [2021-06-05 21:13:17,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:13:17,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:17,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:13:17,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:13:17,974 INFO L87 Difference]: Start difference. First operand 173 states and 516 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 21:13:18,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:18,011 INFO L93 Difference]: Finished difference Result 283 states and 814 transitions. [2021-06-05 21:13:18,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 21:13:18,015 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 21:13:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:18,017 INFO L225 Difference]: With dead ends: 283 [2021-06-05 21:13:18,017 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 21:13:18,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:13:18,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 21:13:18,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 180. [2021-06-05 21:13:18,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.994413407821229) internal successors, (536), 179 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 536 transitions. [2021-06-05 21:13:18,024 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 536 transitions. Word has length 17 [2021-06-05 21:13:18,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:18,024 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 536 transitions. [2021-06-05 21:13:18,024 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 21:13:18,024 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 536 transitions. [2021-06-05 21:13:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:18,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:18,033 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:18,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 21:13:18,033 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:18,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:18,034 INFO L82 PathProgramCache]: Analyzing trace with hash 899406176, now seen corresponding path program 2 times [2021-06-05 21:13:18,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:18,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422411094] [2021-06-05 21:13:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:18,085 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 21:13:18,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:18,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422411094] [2021-06-05 21:13:18,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422411094] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:13:18,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:13:18,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:13:18,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029136975] [2021-06-05 21:13:18,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:13:18,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:18,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:13:18,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:13:18,089 INFO L87 Difference]: Start difference. First operand 180 states and 536 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 21:13:18,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:18,126 INFO L93 Difference]: Finished difference Result 339 states and 942 transitions. [2021-06-05 21:13:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:13:18,126 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 21:13:18,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:18,128 INFO L225 Difference]: With dead ends: 339 [2021-06-05 21:13:18,128 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 21:13:18,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 21:13:18,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 21:13:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 156. [2021-06-05 21:13:18,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.935483870967742) internal successors, (455), 155 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:18,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 455 transitions. [2021-06-05 21:13:18,144 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 455 transitions. Word has length 17 [2021-06-05 21:13:18,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:18,144 INFO L482 AbstractCegarLoop]: Abstraction has 156 states and 455 transitions. [2021-06-05 21:13:18,144 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 21:13:18,144 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 455 transitions. [2021-06-05 21:13:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:18,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:18,146 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:18,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 21:13:18,146 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:18,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:18,147 INFO L82 PathProgramCache]: Analyzing trace with hash 514397406, now seen corresponding path program 1 times [2021-06-05 21:13:18,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:18,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872913626] [2021-06-05 21:13:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:18,189 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 21:13:18,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:18,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872913626] [2021-06-05 21:13:18,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872913626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:18,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439812612] [2021-06-05 21:13:18,190 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 21:13:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:18,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:13:18,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:18,348 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 21:13:18,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439812612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:18,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:18,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-06-05 21:13:18,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915999609] [2021-06-05 21:13:18,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:13:18,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:18,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:13:18,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:13:18,349 INFO L87 Difference]: Start difference. First operand 156 states and 455 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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 21:13:18,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:18,617 INFO L93 Difference]: Finished difference Result 415 states and 1153 transitions. [2021-06-05 21:13:18,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:13:18,618 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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 17 [2021-06-05 21:13:18,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:18,619 INFO L225 Difference]: With dead ends: 415 [2021-06-05 21:13:18,619 INFO L226 Difference]: Without dead ends: 415 [2021-06-05 21:13:18,620 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 181.7ms TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:13:18,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-06-05 21:13:18,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 166. [2021-06-05 21:13:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.993939393939394) internal successors, (494), 165 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:18,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 494 transitions. [2021-06-05 21:13:18,625 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 494 transitions. Word has length 17 [2021-06-05 21:13:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:18,625 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 494 transitions. [2021-06-05 21:13:18,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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 21:13:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 494 transitions. [2021-06-05 21:13:18,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:18,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:18,626 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:18,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:18,842 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:18,843 INFO L82 PathProgramCache]: Analyzing trace with hash -897270306, now seen corresponding path program 3 times [2021-06-05 21:13:18,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:18,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901747623] [2021-06-05 21:13:18,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:18,872 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 21:13:18,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:18,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901747623] [2021-06-05 21:13:18,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901747623] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:13:18,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:13:18,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:13:18,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123075439] [2021-06-05 21:13:18,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:13:18,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:18,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:13:18,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:13:18,873 INFO L87 Difference]: Start difference. First operand 166 states and 494 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 21:13:18,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:18,925 INFO L93 Difference]: Finished difference Result 286 states and 791 transitions. [2021-06-05 21:13:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:13:18,925 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 21:13:18,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:18,927 INFO L225 Difference]: With dead ends: 286 [2021-06-05 21:13:18,927 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 21:13:18,927 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 21:13:18,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 21:13:18,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 174. [2021-06-05 21:13:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.9364161849710984) internal successors, (508), 173 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:18,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 508 transitions. [2021-06-05 21:13:18,932 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 508 transitions. Word has length 17 [2021-06-05 21:13:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:18,932 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 508 transitions. [2021-06-05 21:13:18,932 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 21:13:18,932 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 508 transitions. [2021-06-05 21:13:18,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:18,933 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:18,933 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:18,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 21:13:18,933 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:18,933 INFO L82 PathProgramCache]: Analyzing trace with hash 387521758, now seen corresponding path program 2 times [2021-06-05 21:13:18,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:18,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371642547] [2021-06-05 21:13:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:18,956 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 21:13:18,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:18,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371642547] [2021-06-05 21:13:18,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371642547] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:13:18,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:13:18,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:13:18,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752980274] [2021-06-05 21:13:18,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:13:18,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:18,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:13:18,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:13:18,958 INFO L87 Difference]: Start difference. First operand 174 states and 508 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 21:13:19,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:19,026 INFO L93 Difference]: Finished difference Result 257 states and 709 transitions. [2021-06-05 21:13:19,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:13:19,026 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 21:13:19,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:19,028 INFO L225 Difference]: With dead ends: 257 [2021-06-05 21:13:19,028 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 21:13:19,028 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:13:19,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 21:13:19,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 191. [2021-06-05 21:13:19,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.873684210526316) internal successors, (546), 190 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:19,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 546 transitions. [2021-06-05 21:13:19,032 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 546 transitions. Word has length 17 [2021-06-05 21:13:19,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:19,033 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 546 transitions. [2021-06-05 21:13:19,033 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 21:13:19,033 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 546 transitions. [2021-06-05 21:13:19,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:19,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:19,033 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:19,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 21:13:19,034 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:19,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:19,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1302783074, now seen corresponding path program 3 times [2021-06-05 21:13:19,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:19,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137365334] [2021-06-05 21:13:19,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:19,090 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 21:13:19,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:19,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137365334] [2021-06-05 21:13:19,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137365334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:19,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748291810] [2021-06-05 21:13:19,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:19,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:13:19,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:19,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:13:19,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:19,197 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 21:13:19,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748291810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:19,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:19,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:13:19,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847350377] [2021-06-05 21:13:19,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:19,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:19,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:19,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:19,199 INFO L87 Difference]: Start difference. First operand 191 states and 546 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 21:13:19,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:19,358 INFO L93 Difference]: Finished difference Result 405 states and 1109 transitions. [2021-06-05 21:13:19,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:19,358 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 17 [2021-06-05 21:13:19,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:19,360 INFO L225 Difference]: With dead ends: 405 [2021-06-05 21:13:19,360 INFO L226 Difference]: Without dead ends: 405 [2021-06-05 21:13:19,360 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:19,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-06-05 21:13:19,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 172. [2021-06-05 21:13:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.9064327485380117) internal successors, (497), 171 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 497 transitions. [2021-06-05 21:13:19,365 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 497 transitions. Word has length 17 [2021-06-05 21:13:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:19,365 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 497 transitions. [2021-06-05 21:13:19,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 21:13:19,365 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 497 transitions. [2021-06-05 21:13:19,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:19,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:19,365 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:19,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:19,581 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:19,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:19,581 INFO L82 PathProgramCache]: Analyzing trace with hash -266101350, now seen corresponding path program 4 times [2021-06-05 21:13:19,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:19,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946562366] [2021-06-05 21:13:19,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:19,655 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 21:13:19,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:19,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946562366] [2021-06-05 21:13:19,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946562366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:19,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384677988] [2021-06-05 21:13:19,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:13:19,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:19,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:19,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:13:19,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:19,763 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 21:13:19,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384677988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:19,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:19,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:13:19,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345674028] [2021-06-05 21:13:19,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:19,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:19,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:19,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:19,765 INFO L87 Difference]: Start difference. First operand 172 states and 497 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 21:13:19,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:19,944 INFO L93 Difference]: Finished difference Result 369 states and 1041 transitions. [2021-06-05 21:13:19,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:13:19,944 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 17 [2021-06-05 21:13:19,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:19,946 INFO L225 Difference]: With dead ends: 369 [2021-06-05 21:13:19,946 INFO L226 Difference]: Without dead ends: 369 [2021-06-05 21:13:19,946 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:19,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-06-05 21:13:19,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 178. [2021-06-05 21:13:19,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:19,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-06-05 21:13:19,950 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 17 [2021-06-05 21:13:19,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:19,950 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-06-05 21:13:19,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 21:13:19,951 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-06-05 21:13:19,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:19,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:19,951 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:20,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:20,165 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:20,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:20,165 INFO L82 PathProgramCache]: Analyzing trace with hash 374191714, now seen corresponding path program 2 times [2021-06-05 21:13:20,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:20,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435435203] [2021-06-05 21:13:20,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:20,183 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 21:13:20,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:20,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435435203] [2021-06-05 21:13:20,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435435203] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:13:20,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:13:20,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 21:13:20,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533359673] [2021-06-05 21:13:20,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 21:13:20,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:20,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 21:13:20,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 21:13:20,185 INFO L87 Difference]: Start difference. First operand 178 states and 516 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 21:13:20,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:20,216 INFO L93 Difference]: Finished difference Result 295 states and 822 transitions. [2021-06-05 21:13:20,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 21:13:20,217 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 21:13:20,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:20,218 INFO L225 Difference]: With dead ends: 295 [2021-06-05 21:13:20,218 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 21:13:20,218 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:13:20,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 21:13:20,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 161. [2021-06-05 21:13:20,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.9125) internal successors, (466), 160 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 466 transitions. [2021-06-05 21:13:20,222 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 466 transitions. Word has length 17 [2021-06-05 21:13:20,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:20,222 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 466 transitions. [2021-06-05 21:13:20,222 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 21:13:20,222 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 466 transitions. [2021-06-05 21:13:20,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:20,223 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:20,223 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:20,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 21:13:20,223 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:20,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:20,223 INFO L82 PathProgramCache]: Analyzing trace with hash -814879334, now seen corresponding path program 5 times [2021-06-05 21:13:20,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:20,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988962002] [2021-06-05 21:13:20,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:20,243 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 21:13:20,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:20,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988962002] [2021-06-05 21:13:20,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988962002] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:13:20,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:13:20,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:13:20,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930717644] [2021-06-05 21:13:20,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:13:20,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:20,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:13:20,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:13:20,244 INFO L87 Difference]: Start difference. First operand 161 states and 466 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 21:13:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:20,323 INFO L93 Difference]: Finished difference Result 290 states and 794 transitions. [2021-06-05 21:13:20,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:13:20,323 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 21:13:20,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:20,324 INFO L225 Difference]: With dead ends: 290 [2021-06-05 21:13:20,324 INFO L226 Difference]: Without dead ends: 279 [2021-06-05 21:13:20,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:13:20,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-06-05 21:13:20,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 188. [2021-06-05 21:13:20,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.871657754010695) internal successors, (537), 187 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 537 transitions. [2021-06-05 21:13:20,329 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 537 transitions. Word has length 17 [2021-06-05 21:13:20,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:20,330 INFO L482 AbstractCegarLoop]: Abstraction has 188 states and 537 transitions. [2021-06-05 21:13:20,330 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 21:13:20,330 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 537 transitions. [2021-06-05 21:13:20,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 21:13:20,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:20,330 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:20,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 21:13:20,330 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:20,331 INFO L82 PathProgramCache]: Analyzing trace with hash 289715358, now seen corresponding path program 6 times [2021-06-05 21:13:20,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:20,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666968157] [2021-06-05 21:13:20,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:20,369 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 21:13:20,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:20,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666968157] [2021-06-05 21:13:20,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666968157] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 21:13:20,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 21:13:20,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 21:13:20,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615523262] [2021-06-05 21:13:20,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 21:13:20,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:20,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 21:13:20,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 21:13:20,371 INFO L87 Difference]: Start difference. First operand 188 states and 537 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 21:13:20,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:20,464 INFO L93 Difference]: Finished difference Result 250 states and 711 transitions. [2021-06-05 21:13:20,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:13:20,465 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 21:13:20,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:20,466 INFO L225 Difference]: With dead ends: 250 [2021-06-05 21:13:20,466 INFO L226 Difference]: Without dead ends: 250 [2021-06-05 21:13:20,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:20,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-06-05 21:13:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 168. [2021-06-05 21:13:20,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.8862275449101795) internal successors, (482), 167 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:20,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 482 transitions. [2021-06-05 21:13:20,471 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 482 transitions. Word has length 17 [2021-06-05 21:13:20,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:20,471 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 482 transitions. [2021-06-05 21:13:20,471 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 21:13:20,471 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 482 transitions. [2021-06-05 21:13:20,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:13:20,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:20,472 INFO L554 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 21:13:20,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 21:13:20,472 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:20,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:20,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1201116992, now seen corresponding path program 1 times [2021-06-05 21:13:20,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:20,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099276715] [2021-06-05 21:13:20,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:20,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:20,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099276715] [2021-06-05 21:13:20,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099276715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:20,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026045935] [2021-06-05 21:13:20,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:20,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:13:20,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:20,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026045935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:20,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:20,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:13:20,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386301780] [2021-06-05 21:13:20,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:20,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:20,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:20,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:20,619 INFO L87 Difference]: Start difference. First operand 168 states and 482 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 21:13:20,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:20,706 INFO L93 Difference]: Finished difference Result 513 states and 1492 transitions. [2021-06-05 21:13:20,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:13:20,706 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 19 [2021-06-05 21:13:20,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:20,708 INFO L225 Difference]: With dead ends: 513 [2021-06-05 21:13:20,708 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 21:13:20,708 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:13:20,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 21:13:20,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 260. [2021-06-05 21:13:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 3.057915057915058) internal successors, (792), 259 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 792 transitions. [2021-06-05 21:13:20,714 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 792 transitions. Word has length 19 [2021-06-05 21:13:20,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:20,714 INFO L482 AbstractCegarLoop]: Abstraction has 260 states and 792 transitions. [2021-06-05 21:13:20,714 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 21:13:20,714 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 792 transitions. [2021-06-05 21:13:20,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:13:20,714 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:20,715 INFO L554 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 21:13:20,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 21:13:20,925 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:20,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:20,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1527049802, now seen corresponding path program 2 times [2021-06-05 21:13:20,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:20,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414096378] [2021-06-05 21:13:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:20,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:20,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414096378] [2021-06-05 21:13:20,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414096378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:20,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151391417] [2021-06-05 21:13:20,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:21,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:21,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:21,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:13:21,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:21,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151391417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:21,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:21,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:13:21,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34829891] [2021-06-05 21:13:21,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:21,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:21,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:21,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:21,072 INFO L87 Difference]: Start difference. First operand 260 states and 792 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 21:13:21,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:21,127 INFO L93 Difference]: Finished difference Result 505 states and 1513 transitions. [2021-06-05 21:13:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 21:13:21,127 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 19 [2021-06-05 21:13:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:21,129 INFO L225 Difference]: With dead ends: 505 [2021-06-05 21:13:21,129 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 21:13:21,130 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:13:21,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 21:13:21,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 319. [2021-06-05 21:13:21,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 3.0660377358490565) internal successors, (975), 318 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:21,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 975 transitions. [2021-06-05 21:13:21,136 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 975 transitions. Word has length 19 [2021-06-05 21:13:21,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:21,137 INFO L482 AbstractCegarLoop]: Abstraction has 319 states and 975 transitions. [2021-06-05 21:13:21,137 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 21:13:21,137 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 975 transitions. [2021-06-05 21:13:21,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 21:13:21,137 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:21,137 INFO L554 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 21:13:21,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:21,356 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:21,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1473040526, now seen corresponding path program 1 times [2021-06-05 21:13:21,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:21,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431570484] [2021-06-05 21:13:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:21,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:21,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431570484] [2021-06-05 21:13:21,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431570484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:21,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056467996] [2021-06-05 21:13:21,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:21,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:13:21,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:21,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:21,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056467996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:21,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:21,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:13:21,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852609011] [2021-06-05 21:13:21,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:21,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:21,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:21,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:21,488 INFO L87 Difference]: Start difference. First operand 319 states and 975 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 21:13:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:21,551 INFO L93 Difference]: Finished difference Result 670 states and 1991 transitions. [2021-06-05 21:13:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 21:13:21,551 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 19 [2021-06-05 21:13:21,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:21,553 INFO L225 Difference]: With dead ends: 670 [2021-06-05 21:13:21,553 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 21:13:21,553 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:21,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 21:13:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 353. [2021-06-05 21:13:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 3.0823863636363638) internal successors, (1085), 352 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1085 transitions. [2021-06-05 21:13:21,560 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1085 transitions. Word has length 19 [2021-06-05 21:13:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:21,560 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 1085 transitions. [2021-06-05 21:13:21,561 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 21:13:21,561 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1085 transitions. [2021-06-05 21:13:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:21,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:21,561 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:21,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 21:13:21,777 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:21,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:21,777 INFO L82 PathProgramCache]: Analyzing trace with hash -286324446, now seen corresponding path program 3 times [2021-06-05 21:13:21,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:21,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879782741] [2021-06-05 21:13:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:21,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:21,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879782741] [2021-06-05 21:13:21,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879782741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:21,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253086912] [2021-06-05 21:13:21,800 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:13:21,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:13:21,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:21,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:13:21,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:21,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253086912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:21,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:21,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 21:13:21,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520099011] [2021-06-05 21:13:21,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:13:21,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:21,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:13:21,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:13:21,897 INFO L87 Difference]: Start difference. First operand 353 states and 1085 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:22,075 INFO L93 Difference]: Finished difference Result 989 states and 2888 transitions. [2021-06-05 21:13:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:13:22,076 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:13:22,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:22,079 INFO L225 Difference]: With dead ends: 989 [2021-06-05 21:13:22,079 INFO L226 Difference]: Without dead ends: 989 [2021-06-05 21:13:22,079 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 107.5ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:13:22,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2021-06-05 21:13:22,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 484. [2021-06-05 21:13:22,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.240165631469979) internal successors, (1565), 483 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1565 transitions. [2021-06-05 21:13:22,089 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1565 transitions. Word has length 21 [2021-06-05 21:13:22,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:22,089 INFO L482 AbstractCegarLoop]: Abstraction has 484 states and 1565 transitions. [2021-06-05 21:13:22,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,090 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1565 transitions. [2021-06-05 21:13:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:22,090 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:22,090 INFO L554 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 21:13:22,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 21:13:22,305 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:22,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:22,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2080042904, now seen corresponding path program 1 times [2021-06-05 21:13:22,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:22,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597075387] [2021-06-05 21:13:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:22,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:22,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597075387] [2021-06-05 21:13:22,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597075387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:22,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521334018] [2021-06-05 21:13:22,334 INFO L95 rtionOrderModulation]: Keeping assertion order 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 21:13:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:22,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:13:22,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:22,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521334018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:22,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:22,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:13:22,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55618976] [2021-06-05 21:13:22,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:13:22,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:22,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:13:22,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:13:22,443 INFO L87 Difference]: Start difference. First operand 484 states and 1565 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:22,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:22,798 INFO L93 Difference]: Finished difference Result 1110 states and 3455 transitions. [2021-06-05 21:13:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:13:22,798 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:22,802 INFO L225 Difference]: With dead ends: 1110 [2021-06-05 21:13:22,802 INFO L226 Difference]: Without dead ends: 1110 [2021-06-05 21:13:22,802 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:13:22,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-06-05 21:13:22,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 602. [2021-06-05 21:13:22,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 3.2562396006655576) internal successors, (1957), 601 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:22,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1957 transitions. [2021-06-05 21:13:22,814 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1957 transitions. Word has length 21 [2021-06-05 21:13:22,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:22,814 INFO L482 AbstractCegarLoop]: Abstraction has 602 states and 1957 transitions. [2021-06-05 21:13:22,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:22,814 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1957 transitions. [2021-06-05 21:13:22,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:22,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:22,815 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:23,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 21:13:23,029 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:23,029 INFO L82 PathProgramCache]: Analyzing trace with hash 2036942238, now seen corresponding path program 4 times [2021-06-05 21:13:23,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:23,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156922485] [2021-06-05 21:13:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:23,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:23,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156922485] [2021-06-05 21:13:23,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156922485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:23,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968669206] [2021-06-05 21:13:23,059 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 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 21:13:23,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:23,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:23,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:23,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:23,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968669206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:23,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:23,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:23,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019368537] [2021-06-05 21:13:23,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:23,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:23,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:23,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:23,181 INFO L87 Difference]: Start difference. First operand 602 states and 1957 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:23,924 INFO L93 Difference]: Finished difference Result 1635 states and 4778 transitions. [2021-06-05 21:13:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 21:13:23,925 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-06-05 21:13:23,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:23,929 INFO L225 Difference]: With dead ends: 1635 [2021-06-05 21:13:23,930 INFO L226 Difference]: Without dead ends: 1635 [2021-06-05 21:13:23,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 540.7ms TimeCoverageRelationStatistics Valid=572, Invalid=1498, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 21:13:23,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-06-05 21:13:23,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 668. [2021-06-05 21:13:23,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 3.3013493253373314) internal successors, (2202), 667 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:23,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 2202 transitions. [2021-06-05 21:13:23,946 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 2202 transitions. Word has length 21 [2021-06-05 21:13:23,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:23,946 INFO L482 AbstractCegarLoop]: Abstraction has 668 states and 2202 transitions. [2021-06-05 21:13:23,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:23,946 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 2202 transitions. [2021-06-05 21:13:23,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:23,947 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:23,947 INFO L554 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 21:13:24,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 21:13:24,161 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:24,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:24,161 INFO L82 PathProgramCache]: Analyzing trace with hash 625274526, now seen corresponding path program 2 times [2021-06-05 21:13:24,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:24,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358037102] [2021-06-05 21:13:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:24,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:24,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358037102] [2021-06-05 21:13:24,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358037102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:24,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563214204] [2021-06-05 21:13:24,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:24,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:24,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:24,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:13:24,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:24,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563214204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:24,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:24,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:13:24,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028942977] [2021-06-05 21:13:24,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:13:24,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:24,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:13:24,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:13:24,297 INFO L87 Difference]: Start difference. First operand 668 states and 2202 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 21:13:24,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:24,630 INFO L93 Difference]: Finished difference Result 2300 states and 7176 transitions. [2021-06-05 21:13:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:13:24,630 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 21 [2021-06-05 21:13:24,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:24,637 INFO L225 Difference]: With dead ends: 2300 [2021-06-05 21:13:24,637 INFO L226 Difference]: Without dead ends: 2292 [2021-06-05 21:13:24,638 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:13:24,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2292 states. [2021-06-05 21:13:24,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2292 to 890. [2021-06-05 21:13:24,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.404949381327334) internal successors, (3027), 889 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:24,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 3027 transitions. [2021-06-05 21:13:24,672 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 3027 transitions. Word has length 21 [2021-06-05 21:13:24,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:24,672 INFO L482 AbstractCegarLoop]: Abstraction has 890 states and 3027 transitions. [2021-06-05 21:13:24,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 21:13:24,673 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 3027 transitions. [2021-06-05 21:13:24,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:24,675 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:24,675 INFO L554 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 21:13:24,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:24,892 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:24,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:24,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1603831970, now seen corresponding path program 3 times [2021-06-05 21:13:24,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:24,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113405984] [2021-06-05 21:13:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:24,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:24,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113405984] [2021-06-05 21:13:24,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113405984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:24,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134650442] [2021-06-05 21:13:24,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:13:24,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:13:24,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:24,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:13:24,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:25,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134650442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:25,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:25,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:13:25,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097175620] [2021-06-05 21:13:25,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:13:25,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:25,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:13:25,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:13:25,031 INFO L87 Difference]: Start difference. First operand 890 states and 3027 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:25,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:25,376 INFO L93 Difference]: Finished difference Result 2432 states and 7661 transitions. [2021-06-05 21:13:25,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:13:25,376 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:25,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:25,384 INFO L225 Difference]: With dead ends: 2432 [2021-06-05 21:13:25,384 INFO L226 Difference]: Without dead ends: 2432 [2021-06-05 21:13:25,385 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:13:25,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-06-05 21:13:25,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 884. [2021-06-05 21:13:25,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.3975084937712343) internal successors, (3000), 883 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:25,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 3000 transitions. [2021-06-05 21:13:25,405 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 3000 transitions. Word has length 21 [2021-06-05 21:13:25,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:25,405 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 3000 transitions. [2021-06-05 21:13:25,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:25,405 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 3000 transitions. [2021-06-05 21:13:25,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:25,407 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:25,407 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:25,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:25,621 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:25,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:25,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1910066590, now seen corresponding path program 5 times [2021-06-05 21:13:25,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:25,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150874377] [2021-06-05 21:13:25,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:25,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:25,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150874377] [2021-06-05 21:13:25,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150874377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:25,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398948774] [2021-06-05 21:13:25,657 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 21:13:25,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:13:25,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:25,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:25,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:25,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398948774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:25,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:25,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:25,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222504772] [2021-06-05 21:13:25,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:25,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:25,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:25,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:25,776 INFO L87 Difference]: Start difference. First operand 884 states and 3000 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:26,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:26,263 INFO L93 Difference]: Finished difference Result 1719 states and 5149 transitions. [2021-06-05 21:13:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:13:26,263 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-06-05 21:13:26,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:26,269 INFO L225 Difference]: With dead ends: 1719 [2021-06-05 21:13:26,269 INFO L226 Difference]: Without dead ends: 1698 [2021-06-05 21:13:26,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 337.8ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:13:26,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-06-05 21:13:26,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 891. [2021-06-05 21:13:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.385393258426966) internal successors, (3013), 890 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 3013 transitions. [2021-06-05 21:13:26,287 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 3013 transitions. Word has length 21 [2021-06-05 21:13:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:26,287 INFO L482 AbstractCegarLoop]: Abstraction has 891 states and 3013 transitions. [2021-06-05 21:13:26,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:26,287 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 3013 transitions. [2021-06-05 21:13:26,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:26,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:26,289 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:26,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 21:13:26,505 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:26,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:26,505 INFO L82 PathProgramCache]: Analyzing trace with hash 73792162, now seen corresponding path program 6 times [2021-06-05 21:13:26,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:26,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2804691] [2021-06-05 21:13:26,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:26,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:26,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2804691] [2021-06-05 21:13:26,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2804691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:26,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90766760] [2021-06-05 21:13:26,534 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 21:13:26,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:13:26,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:26,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:26,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:26,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90766760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:26,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:26,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:26,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455536774] [2021-06-05 21:13:26,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:26,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:26,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:26,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:26,648 INFO L87 Difference]: Start difference. First operand 891 states and 3013 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:27,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:27,029 INFO L93 Difference]: Finished difference Result 1635 states and 4959 transitions. [2021-06-05 21:13:27,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:13:27,029 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-06-05 21:13:27,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:27,033 INFO L225 Difference]: With dead ends: 1635 [2021-06-05 21:13:27,033 INFO L226 Difference]: Without dead ends: 1585 [2021-06-05 21:13:27,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 241.9ms TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:13:27,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2021-06-05 21:13:27,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 924. [2021-06-05 21:13:27,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 3.3575297941495124) internal successors, (3099), 923 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:27,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 3099 transitions. [2021-06-05 21:13:27,050 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 3099 transitions. Word has length 21 [2021-06-05 21:13:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:27,050 INFO L482 AbstractCegarLoop]: Abstraction has 924 states and 3099 transitions. [2021-06-05 21:13:27,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 3099 transitions. [2021-06-05 21:13:27,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:27,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:27,052 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:27,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:27,261 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:27,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:27,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1449955162, now seen corresponding path program 7 times [2021-06-05 21:13:27,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:27,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294037993] [2021-06-05 21:13:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:27,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:27,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294037993] [2021-06-05 21:13:27,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294037993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:27,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586980488] [2021-06-05 21:13:27,289 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 21:13:27,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:27,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:27,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:27,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586980488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:27,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:27,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:27,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933150048] [2021-06-05 21:13:27,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:27,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:27,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:27,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:27,404 INFO L87 Difference]: Start difference. First operand 924 states and 3099 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:28,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:28,147 INFO L93 Difference]: Finished difference Result 2382 states and 7086 transitions. [2021-06-05 21:13:28,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 21:13:28,151 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-06-05 21:13:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:28,155 INFO L225 Difference]: With dead ends: 2382 [2021-06-05 21:13:28,156 INFO L226 Difference]: Without dead ends: 2382 [2021-06-05 21:13:28,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 528.8ms TimeCoverageRelationStatistics Valid=643, Invalid=1807, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:13:28,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2021-06-05 21:13:28,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 1007. [2021-06-05 21:13:28,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 3.4025844930417497) internal successors, (3423), 1006 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 3423 transitions. [2021-06-05 21:13:28,179 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 3423 transitions. Word has length 21 [2021-06-05 21:13:28,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:28,180 INFO L482 AbstractCegarLoop]: Abstraction has 1007 states and 3423 transitions. [2021-06-05 21:13:28,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:28,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 3423 transitions. [2021-06-05 21:13:28,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:28,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:28,181 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:28,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 21:13:28,397 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:28,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:28,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1323079514, now seen corresponding path program 8 times [2021-06-05 21:13:28,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:28,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002193349] [2021-06-05 21:13:28,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:28,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:28,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002193349] [2021-06-05 21:13:28,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002193349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:28,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295037122] [2021-06-05 21:13:28,423 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 21:13:28,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:28,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:28,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:28,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:28,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295037122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:28,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:28,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:28,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464915031] [2021-06-05 21:13:28,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:28,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:28,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:28,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:28,554 INFO L87 Difference]: Start difference. First operand 1007 states and 3423 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:29,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:29,008 INFO L93 Difference]: Finished difference Result 1981 states and 5928 transitions. [2021-06-05 21:13:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:13:29,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-06-05 21:13:29,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:29,011 INFO L225 Difference]: With dead ends: 1981 [2021-06-05 21:13:29,012 INFO L226 Difference]: Without dead ends: 1953 [2021-06-05 21:13:29,012 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 314.1ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:13:29,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1953 states. [2021-06-05 21:13:29,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1953 to 993. [2021-06-05 21:13:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 3.403225806451613) internal successors, (3376), 992 states have internal predecessors, (3376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:29,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 3376 transitions. [2021-06-05 21:13:29,031 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 3376 transitions. Word has length 21 [2021-06-05 21:13:29,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:29,031 INFO L482 AbstractCegarLoop]: Abstraction has 993 states and 3376 transitions. [2021-06-05 21:13:29,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 3376 transitions. [2021-06-05 21:13:29,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:29,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:29,033 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:29,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:29,249 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:29,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:29,249 INFO L82 PathProgramCache]: Analyzing trace with hash 2108532062, now seen corresponding path program 9 times [2021-06-05 21:13:29,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:29,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623652730] [2021-06-05 21:13:29,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:29,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:29,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623652730] [2021-06-05 21:13:29,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623652730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:29,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171729045] [2021-06-05 21:13:29,276 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 21:13:29,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:13:29,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:29,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:29,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:29,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:29,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171729045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:29,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:29,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:29,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498769273] [2021-06-05 21:13:29,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:29,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:29,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:29,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:29,508 INFO L87 Difference]: Start difference. First operand 993 states and 3376 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:30,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:30,284 INFO L93 Difference]: Finished difference Result 2387 states and 7209 transitions. [2021-06-05 21:13:30,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 21:13:30,284 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-06-05 21:13:30,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:30,288 INFO L225 Difference]: With dead ends: 2387 [2021-06-05 21:13:30,288 INFO L226 Difference]: Without dead ends: 2387 [2021-06-05 21:13:30,289 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 578.9ms TimeCoverageRelationStatistics Valid=733, Invalid=2023, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 21:13:30,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2021-06-05 21:13:30,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 979. [2021-06-05 21:13:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 978 states have (on average 3.4161554192229038) internal successors, (3341), 978 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:30,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 3341 transitions. [2021-06-05 21:13:30,309 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 3341 transitions. Word has length 21 [2021-06-05 21:13:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:30,309 INFO L482 AbstractCegarLoop]: Abstraction has 979 states and 3341 transitions. [2021-06-05 21:13:30,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 3341 transitions. [2021-06-05 21:13:30,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:30,311 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:30,311 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:30,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 21:13:30,525 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:30,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1149753510, now seen corresponding path program 10 times [2021-06-05 21:13:30,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:30,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043337678] [2021-06-05 21:13:30,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:30,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:30,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043337678] [2021-06-05 21:13:30,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043337678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:30,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86741638] [2021-06-05 21:13:30,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:13:30,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:30,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:30,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:30,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:30,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86741638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:30,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:30,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:30,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506873315] [2021-06-05 21:13:30,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:30,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:30,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:30,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:30,670 INFO L87 Difference]: Start difference. First operand 979 states and 3341 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:31,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:31,314 INFO L93 Difference]: Finished difference Result 2071 states and 6332 transitions. [2021-06-05 21:13:31,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 21:13:31,314 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-06-05 21:13:31,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:31,317 INFO L225 Difference]: With dead ends: 2071 [2021-06-05 21:13:31,317 INFO L226 Difference]: Without dead ends: 2071 [2021-06-05 21:13:31,318 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 444.9ms TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:13:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-05 21:13:31,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 993. [2021-06-05 21:13:31,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 3.40625) internal successors, (3379), 992 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 3379 transitions. [2021-06-05 21:13:31,335 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 3379 transitions. Word has length 21 [2021-06-05 21:13:31,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:31,335 INFO L482 AbstractCegarLoop]: Abstraction has 993 states and 3379 transitions. [2021-06-05 21:13:31,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:31,336 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 3379 transitions. [2021-06-05 21:13:31,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:31,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:31,337 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:31,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 21:13:31,553 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:31,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:31,553 INFO L82 PathProgramCache]: Analyzing trace with hash -509460446, now seen corresponding path program 11 times [2021-06-05 21:13:31,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:31,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960122115] [2021-06-05 21:13:31,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:31,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:31,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960122115] [2021-06-05 21:13:31,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960122115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:31,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143755830] [2021-06-05 21:13:31,576 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 21:13:31,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:13:31,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:31,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:13:31,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:31,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143755830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:31,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:31,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 21:13:31,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823766462] [2021-06-05 21:13:31,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:13:31,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:31,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:13:31,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:13:31,637 INFO L87 Difference]: Start difference. First operand 993 states and 3379 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:31,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:31,741 INFO L93 Difference]: Finished difference Result 1610 states and 5032 transitions. [2021-06-05 21:13:31,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:13:31,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 21:13:31,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:31,744 INFO L225 Difference]: With dead ends: 1610 [2021-06-05 21:13:31,744 INFO L226 Difference]: Without dead ends: 1602 [2021-06-05 21:13:31,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:31,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1602 states. [2021-06-05 21:13:31,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1602 to 1009. [2021-06-05 21:13:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 3.3878968253968256) internal successors, (3415), 1008 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:31,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 3415 transitions. [2021-06-05 21:13:31,759 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 3415 transitions. Word has length 21 [2021-06-05 21:13:31,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:31,759 INFO L482 AbstractCegarLoop]: Abstraction has 1009 states and 3415 transitions. [2021-06-05 21:13:31,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:31,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 3415 transitions. [2021-06-05 21:13:31,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:31,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:31,761 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:31,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 21:13:31,977 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:31,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:31,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1698531494, now seen corresponding path program 12 times [2021-06-05 21:13:31,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:31,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301543611] [2021-06-05 21:13:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:31,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:31,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301543611] [2021-06-05 21:13:31,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301543611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:31,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563356258] [2021-06-05 21:13:31,999 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 21:13:32,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:13:32,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:32,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:32,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:32,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563356258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:32,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:32,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:32,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891722798] [2021-06-05 21:13:32,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:32,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:32,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:32,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:32,120 INFO L87 Difference]: Start difference. First operand 1009 states and 3415 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:32,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:32,567 INFO L93 Difference]: Finished difference Result 1957 states and 5919 transitions. [2021-06-05 21:13:32,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:13:32,567 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-06-05 21:13:32,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:32,570 INFO L225 Difference]: With dead ends: 1957 [2021-06-05 21:13:32,570 INFO L226 Difference]: Without dead ends: 1936 [2021-06-05 21:13:32,571 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 303.2ms TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:13:32,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-06-05 21:13:32,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1046. [2021-06-05 21:13:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 3.3789473684210525) internal successors, (3531), 1045 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:32,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3531 transitions. [2021-06-05 21:13:32,598 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3531 transitions. Word has length 21 [2021-06-05 21:13:32,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:32,598 INFO L482 AbstractCegarLoop]: Abstraction has 1046 states and 3531 transitions. [2021-06-05 21:13:32,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:32,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3531 transitions. [2021-06-05 21:13:32,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:32,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:32,600 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:32,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 21:13:32,813 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:32,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:32,813 INFO L82 PathProgramCache]: Analyzing trace with hash -593936802, now seen corresponding path program 13 times [2021-06-05 21:13:32,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:32,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687089698] [2021-06-05 21:13:32,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:32,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:32,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687089698] [2021-06-05 21:13:32,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687089698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:32,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669965507] [2021-06-05 21:13:32,843 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) [2021-06-05 21:13:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:32,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:32,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:32,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669965507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:32,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:32,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:32,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896261732] [2021-06-05 21:13:32,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:32,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:32,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:32,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:32,943 INFO L87 Difference]: Start difference. First operand 1046 states and 3531 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 21:13:33,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:33,521 INFO L93 Difference]: Finished difference Result 2019 states and 6121 transitions. [2021-06-05 21:13:33,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:13:33,522 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 21:13:33,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:33,525 INFO L225 Difference]: With dead ends: 2019 [2021-06-05 21:13:33,525 INFO L226 Difference]: Without dead ends: 2019 [2021-06-05 21:13:33,525 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 386.1ms TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:13:33,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2019 states. [2021-06-05 21:13:33,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2019 to 1007. [2021-06-05 21:13:33,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 3.3807157057654074) internal successors, (3401), 1006 states have internal predecessors, (3401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:33,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 3401 transitions. [2021-06-05 21:13:33,542 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 3401 transitions. Word has length 21 [2021-06-05 21:13:33,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:33,542 INFO L482 AbstractCegarLoop]: Abstraction has 1007 states and 3401 transitions. [2021-06-05 21:13:33,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 21:13:33,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 3401 transitions. [2021-06-05 21:13:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:33,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:33,544 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:33,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 21:13:33,760 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:33,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:33,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1660587678, now seen corresponding path program 14 times [2021-06-05 21:13:33,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:33,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10397621] [2021-06-05 21:13:33,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:33,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:33,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10397621] [2021-06-05 21:13:33,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10397621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:33,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975320686] [2021-06-05 21:13:33,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:13:33,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:33,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:33,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:33,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:33,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975320686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:33,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:33,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:33,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160369763] [2021-06-05 21:13:33,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:33,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:33,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:33,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:33,889 INFO L87 Difference]: Start difference. First operand 1007 states and 3401 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:34,249 INFO L93 Difference]: Finished difference Result 1560 states and 4856 transitions. [2021-06-05 21:13:34,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:13:34,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-06-05 21:13:34,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:34,252 INFO L225 Difference]: With dead ends: 1560 [2021-06-05 21:13:34,252 INFO L226 Difference]: Without dead ends: 1510 [2021-06-05 21:13:34,252 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 266.8ms TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2021-06-05 21:13:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2021-06-05 21:13:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1058. [2021-06-05 21:13:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.3614001892147587) internal successors, (3553), 1057 states have internal predecessors, (3553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3553 transitions. [2021-06-05 21:13:34,267 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3553 transitions. Word has length 21 [2021-06-05 21:13:34,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:34,267 INFO L482 AbstractCegarLoop]: Abstraction has 1058 states and 3553 transitions. [2021-06-05 21:13:34,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:34,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3553 transitions. [2021-06-05 21:13:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:34,268 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:34,268 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:34,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:34,481 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:34,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1126698146, now seen corresponding path program 15 times [2021-06-05 21:13:34,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:34,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299794792] [2021-06-05 21:13:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:34,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:34,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299794792] [2021-06-05 21:13:34,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299794792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:34,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281744590] [2021-06-05 21:13:34,506 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 21:13:34,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:13:34,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:34,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:34,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:34,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281744590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:34,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:34,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:34,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952450839] [2021-06-05 21:13:34,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:34,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:34,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:34,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:34,625 INFO L87 Difference]: Start difference. First operand 1058 states and 3553 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:35,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:35,128 INFO L93 Difference]: Finished difference Result 1960 states and 5933 transitions. [2021-06-05 21:13:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:13:35,129 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-06-05 21:13:35,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:35,132 INFO L225 Difference]: With dead ends: 1960 [2021-06-05 21:13:35,132 INFO L226 Difference]: Without dead ends: 1932 [2021-06-05 21:13:35,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 358.2ms TimeCoverageRelationStatistics Valid=349, Invalid=911, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:13:35,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2021-06-05 21:13:35,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 1170. [2021-06-05 21:13:35,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.3481608212147136) internal successors, (3914), 1169 states have internal predecessors, (3914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:35,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 3914 transitions. [2021-06-05 21:13:35,167 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 3914 transitions. Word has length 21 [2021-06-05 21:13:35,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:35,167 INFO L482 AbstractCegarLoop]: Abstraction has 1170 states and 3914 transitions. [2021-06-05 21:13:35,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:35,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 3914 transitions. [2021-06-05 21:13:35,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:35,169 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:35,169 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:35,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 21:13:35,383 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:35,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:35,383 INFO L82 PathProgramCache]: Analyzing trace with hash -22103454, now seen corresponding path program 16 times [2021-06-05 21:13:35,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:35,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932281991] [2021-06-05 21:13:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:35,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:35,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932281991] [2021-06-05 21:13:35,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932281991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:35,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822295855] [2021-06-05 21:13:35,407 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 21:13:35,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:35,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:35,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:35,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:35,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822295855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:35,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:35,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:35,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997404169] [2021-06-05 21:13:35,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:35,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:35,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:35,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:35,513 INFO L87 Difference]: Start difference. First operand 1170 states and 3914 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 21:13:36,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:36,099 INFO L93 Difference]: Finished difference Result 2038 states and 6143 transitions. [2021-06-05 21:13:36,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:13:36,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 21:13:36,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:36,102 INFO L225 Difference]: With dead ends: 2038 [2021-06-05 21:13:36,102 INFO L226 Difference]: Without dead ends: 2038 [2021-06-05 21:13:36,103 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=472, Invalid=1168, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:13:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2038 states. [2021-06-05 21:13:36,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2038 to 1160. [2021-06-05 21:13:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1160 states, 1159 states have (on average 3.3494391716997414) internal successors, (3882), 1159 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:36,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 3882 transitions. [2021-06-05 21:13:36,120 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 3882 transitions. Word has length 21 [2021-06-05 21:13:36,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:36,120 INFO L482 AbstractCegarLoop]: Abstraction has 1160 states and 3882 transitions. [2021-06-05 21:13:36,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 21:13:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 3882 transitions. [2021-06-05 21:13:36,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:36,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:36,122 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:36,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:36,333 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:36,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:36,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2048451348, now seen corresponding path program 17 times [2021-06-05 21:13:36,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:36,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913223730] [2021-06-05 21:13:36,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:36,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:36,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913223730] [2021-06-05 21:13:36,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913223730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:36,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888859577] [2021-06-05 21:13:36,352 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 21:13:36,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:13:36,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:36,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:13:36,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:36,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888859577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:36,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:36,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:13:36,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538631334] [2021-06-05 21:13:36,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:36,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:36,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:36,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:36,423 INFO L87 Difference]: Start difference. First operand 1160 states and 3882 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 21:13:36,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:36,561 INFO L93 Difference]: Finished difference Result 2460 states and 7863 transitions. [2021-06-05 21:13:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:13:36,561 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 21 [2021-06-05 21:13:36,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:36,564 INFO L225 Difference]: With dead ends: 2460 [2021-06-05 21:13:36,564 INFO L226 Difference]: Without dead ends: 2460 [2021-06-05 21:13:36,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:13:36,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-06-05 21:13:36,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1533. [2021-06-05 21:13:36,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.468668407310705) internal successors, (5314), 1532 states have internal predecessors, (5314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:36,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5314 transitions. [2021-06-05 21:13:36,587 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5314 transitions. Word has length 21 [2021-06-05 21:13:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:36,587 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 5314 transitions. [2021-06-05 21:13:36,587 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 21:13:36,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5314 transitions. [2021-06-05 21:13:36,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:36,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:36,589 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:36,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 21:13:36,789 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:36,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:36,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1760711844, now seen corresponding path program 18 times [2021-06-05 21:13:36,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:36,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46165002] [2021-06-05 21:13:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:36,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:36,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46165002] [2021-06-05 21:13:36,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46165002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:36,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39234243] [2021-06-05 21:13:36,808 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 21:13:36,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:13:36,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:36,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:13:36,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:36,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39234243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:36,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:36,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 21:13:36,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492752827] [2021-06-05 21:13:36,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:13:36,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:36,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:13:36,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:13:36,887 INFO L87 Difference]: Start difference. First operand 1533 states and 5314 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:36,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:36,982 INFO L93 Difference]: Finished difference Result 2266 states and 7294 transitions. [2021-06-05 21:13:36,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:36,983 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 21:13:36,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:36,985 INFO L225 Difference]: With dead ends: 2266 [2021-06-05 21:13:36,986 INFO L226 Difference]: Without dead ends: 2258 [2021-06-05 21:13:36,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:36,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2258 states. [2021-06-05 21:13:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2258 to 1533. [2021-06-05 21:13:37,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.4640992167101827) internal successors, (5307), 1532 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:37,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5307 transitions. [2021-06-05 21:13:37,007 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5307 transitions. Word has length 21 [2021-06-05 21:13:37,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:37,007 INFO L482 AbstractCegarLoop]: Abstraction has 1533 states and 5307 transitions. [2021-06-05 21:13:37,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:37,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5307 transitions. [2021-06-05 21:13:37,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:37,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:37,009 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:37,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 21:13:37,218 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:37,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:37,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1897788598, now seen corresponding path program 19 times [2021-06-05 21:13:37,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:37,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214658848] [2021-06-05 21:13:37,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:37,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:37,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:37,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214658848] [2021-06-05 21:13:37,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214658848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:37,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047127972] [2021-06-05 21:13:37,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:13:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:37,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:13:37,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:37,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047127972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:37,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:37,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:13:37,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051696345] [2021-06-05 21:13:37,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:13:37,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:37,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:13:37,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:13:37,302 INFO L87 Difference]: Start difference. First operand 1533 states and 5307 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 21:13:37,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:37,395 INFO L93 Difference]: Finished difference Result 2068 states and 6734 transitions. [2021-06-05 21:13:37,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:13:37,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 21 [2021-06-05 21:13:37,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:37,403 INFO L225 Difference]: With dead ends: 2068 [2021-06-05 21:13:37,403 INFO L226 Difference]: Without dead ends: 2046 [2021-06-05 21:13:37,403 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:37,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-05 21:13:37,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1571. [2021-06-05 21:13:37,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 3.4414012738853503) internal successors, (5403), 1570 states have internal predecessors, (5403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5403 transitions. [2021-06-05 21:13:37,426 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5403 transitions. Word has length 21 [2021-06-05 21:13:37,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:37,426 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 5403 transitions. [2021-06-05 21:13:37,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 21:13:37,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5403 transitions. [2021-06-05 21:13:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:37,429 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:37,429 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:37,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 21:13:37,645 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:37,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1028833576, now seen corresponding path program 2 times [2021-06-05 21:13:37,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:37,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295588112] [2021-06-05 21:13:37,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:37,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:37,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:37,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295588112] [2021-06-05 21:13:37,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295588112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:37,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857672863] [2021-06-05 21:13:37,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:13:37,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:37,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:37,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:37,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:37,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857672863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:37,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:37,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:37,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604134142] [2021-06-05 21:13:37,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:37,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:37,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:37,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:37,790 INFO L87 Difference]: Start difference. First operand 1571 states and 5403 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:38,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:38,124 INFO L93 Difference]: Finished difference Result 1717 states and 5770 transitions. [2021-06-05 21:13:38,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:13:38,124 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-06-05 21:13:38,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:38,126 INFO L225 Difference]: With dead ends: 1717 [2021-06-05 21:13:38,126 INFO L226 Difference]: Without dead ends: 1717 [2021-06-05 21:13:38,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:13:38,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2021-06-05 21:13:38,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1595. [2021-06-05 21:13:38,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.4372647427854455) internal successors, (5479), 1594 states have internal predecessors, (5479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:38,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5479 transitions. [2021-06-05 21:13:38,145 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5479 transitions. Word has length 21 [2021-06-05 21:13:38,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:38,145 INFO L482 AbstractCegarLoop]: Abstraction has 1595 states and 5479 transitions. [2021-06-05 21:13:38,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:38,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5479 transitions. [2021-06-05 21:13:38,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:38,147 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:38,147 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:38,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 21:13:38,347 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:38,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:38,348 INFO L82 PathProgramCache]: Analyzing trace with hash -856277916, now seen corresponding path program 3 times [2021-06-05 21:13:38,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:38,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22838647] [2021-06-05 21:13:38,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:38,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:38,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22838647] [2021-06-05 21:13:38,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22838647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:38,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158887051] [2021-06-05 21:13:38,369 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 21:13:38,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:13:38,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:38,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:13:38,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:38,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158887051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:38,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:38,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 21:13:38,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677641567] [2021-06-05 21:13:38,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 21:13:38,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:38,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 21:13:38,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 21:13:38,431 INFO L87 Difference]: Start difference. First operand 1595 states and 5479 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:38,524 INFO L93 Difference]: Finished difference Result 2609 states and 8666 transitions. [2021-06-05 21:13:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:13:38,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:13:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:38,528 INFO L225 Difference]: With dead ends: 2609 [2021-06-05 21:13:38,528 INFO L226 Difference]: Without dead ends: 2597 [2021-06-05 21:13:38,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:38,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-06-05 21:13:38,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 1805. [2021-06-05 21:13:38,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1805 states, 1804 states have (on average 3.4866962305986697) internal successors, (6290), 1804 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1805 states to 1805 states and 6290 transitions. [2021-06-05 21:13:38,553 INFO L78 Accepts]: Start accepts. Automaton has 1805 states and 6290 transitions. Word has length 21 [2021-06-05 21:13:38,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:38,553 INFO L482 AbstractCegarLoop]: Abstraction has 1805 states and 6290 transitions. [2021-06-05 21:13:38,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:38,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1805 states and 6290 transitions. [2021-06-05 21:13:38,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:38,556 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:38,556 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:38,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 21:13:38,769 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:38,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1477091936, now seen corresponding path program 4 times [2021-06-05 21:13:38,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:38,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809053147] [2021-06-05 21:13:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:38,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:38,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809053147] [2021-06-05 21:13:38,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809053147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:38,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10654821] [2021-06-05 21:13:38,798 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 21:13:38,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:38,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:38,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:38,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:38,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10654821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:38,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:38,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:38,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690545024] [2021-06-05 21:13:38,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:38,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:38,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:38,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:38,906 INFO L87 Difference]: Start difference. First operand 1805 states and 6290 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:39,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:39,288 INFO L93 Difference]: Finished difference Result 2294 states and 7489 transitions. [2021-06-05 21:13:39,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:13:39,289 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-06-05 21:13:39,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:39,291 INFO L225 Difference]: With dead ends: 2294 [2021-06-05 21:13:39,291 INFO L226 Difference]: Without dead ends: 2294 [2021-06-05 21:13:39,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 289.1ms TimeCoverageRelationStatistics Valid=201, Invalid=669, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:13:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-06-05 21:13:39,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1849. [2021-06-05 21:13:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1848 states have (on average 3.482683982683983) internal successors, (6436), 1848 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:39,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 6436 transitions. [2021-06-05 21:13:39,316 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 6436 transitions. Word has length 21 [2021-06-05 21:13:39,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:39,317 INFO L482 AbstractCegarLoop]: Abstraction has 1849 states and 6436 transitions. [2021-06-05 21:13:39,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:39,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 6436 transitions. [2021-06-05 21:13:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:39,319 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:39,319 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:39,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:39,535 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:39,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:39,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1043981668, now seen corresponding path program 5 times [2021-06-05 21:13:39,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:39,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427764607] [2021-06-05 21:13:39,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:39,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:39,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427764607] [2021-06-05 21:13:39,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427764607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:39,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734100341] [2021-06-05 21:13:39,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:13:39,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:13:39,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:13:39,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:39,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734100341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:39,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:39,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-06-05 21:13:39,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356554055] [2021-06-05 21:13:39,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 21:13:39,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:39,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 21:13:39,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 21:13:39,630 INFO L87 Difference]: Start difference. First operand 1849 states and 6436 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 21:13:39,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:39,757 INFO L93 Difference]: Finished difference Result 3204 states and 10512 transitions. [2021-06-05 21:13:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:13:39,757 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 21:13:39,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:39,761 INFO L225 Difference]: With dead ends: 3204 [2021-06-05 21:13:39,761 INFO L226 Difference]: Without dead ends: 3204 [2021-06-05 21:13:39,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:13:39,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2021-06-05 21:13:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 1852. [2021-06-05 21:13:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1852 states, 1851 states have (on average 3.4770394381415453) internal successors, (6436), 1851 states have internal predecessors, (6436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:39,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1852 states to 1852 states and 6436 transitions. [2021-06-05 21:13:39,790 INFO L78 Accepts]: Start accepts. Automaton has 1852 states and 6436 transitions. Word has length 21 [2021-06-05 21:13:39,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:39,790 INFO L482 AbstractCegarLoop]: Abstraction has 1852 states and 6436 transitions. [2021-06-05 21:13:39,790 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 21:13:39,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1852 states and 6436 transitions. [2021-06-05 21:13:39,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:39,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:39,793 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:40,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 21:13:40,009 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:40,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:40,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1350216288, now seen corresponding path program 6 times [2021-06-05 21:13:40,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:40,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043897803] [2021-06-05 21:13:40,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:40,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:40,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043897803] [2021-06-05 21:13:40,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043897803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:40,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075815234] [2021-06-05 21:13:40,035 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 21:13:40,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:13:40,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:40,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:40,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:40,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075815234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:40,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:40,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:40,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790757311] [2021-06-05 21:13:40,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:40,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:40,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:40,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:40,140 INFO L87 Difference]: Start difference. First operand 1852 states and 6436 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:40,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:40,486 INFO L93 Difference]: Finished difference Result 2161 states and 7153 transitions. [2021-06-05 21:13:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:13:40,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-06-05 21:13:40,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:40,489 INFO L225 Difference]: With dead ends: 2161 [2021-06-05 21:13:40,489 INFO L226 Difference]: Without dead ends: 2154 [2021-06-05 21:13:40,489 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:13:40,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-06-05 21:13:40,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1859. [2021-06-05 21:13:40,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 3.470936490850377) internal successors, (6449), 1858 states have internal predecessors, (6449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:40,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 6449 transitions. [2021-06-05 21:13:40,510 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 6449 transitions. Word has length 21 [2021-06-05 21:13:40,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:40,511 INFO L482 AbstractCegarLoop]: Abstraction has 1859 states and 6449 transitions. [2021-06-05 21:13:40,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:40,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 6449 transitions. [2021-06-05 21:13:40,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:40,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:40,513 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:40,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 21:13:40,714 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:40,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:40,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1951571416, now seen corresponding path program 7 times [2021-06-05 21:13:40,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:40,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430170815] [2021-06-05 21:13:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:40,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:40,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430170815] [2021-06-05 21:13:40,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430170815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:40,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430739463] [2021-06-05 21:13:40,733 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 21:13:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:40,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 21:13:40,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:40,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430739463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:40,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:40,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 21:13:40,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943954375] [2021-06-05 21:13:40,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:13:40,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:40,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:13:40,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:13:40,812 INFO L87 Difference]: Start difference. First operand 1859 states and 6449 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 21:13:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:40,944 INFO L93 Difference]: Finished difference Result 3100 states and 10311 transitions. [2021-06-05 21:13:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:13:40,945 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 21:13:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:40,948 INFO L225 Difference]: With dead ends: 3100 [2021-06-05 21:13:40,948 INFO L226 Difference]: Without dead ends: 3100 [2021-06-05 21:13:40,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:13:40,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2021-06-05 21:13:40,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 2105. [2021-06-05 21:13:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2105 states, 2104 states have (on average 3.491444866920152) internal successors, (7346), 2104 states have internal predecessors, (7346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2105 states to 2105 states and 7346 transitions. [2021-06-05 21:13:40,977 INFO L78 Accepts]: Start accepts. Automaton has 2105 states and 7346 transitions. Word has length 21 [2021-06-05 21:13:40,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:40,977 INFO L482 AbstractCegarLoop]: Abstraction has 2105 states and 7346 transitions. [2021-06-05 21:13:40,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 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 21:13:40,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2105 states and 7346 transitions. [2021-06-05 21:13:40,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:40,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:40,980 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:41,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:41,181 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:41,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:41,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1401139628, now seen corresponding path program 8 times [2021-06-05 21:13:41,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:41,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131973420] [2021-06-05 21:13:41,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:41,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:41,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131973420] [2021-06-05 21:13:41,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131973420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:41,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763138191] [2021-06-05 21:13:41,219 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 21:13:41,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:41,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:41,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:41,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:41,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763138191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:41,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:41,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:41,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684238968] [2021-06-05 21:13:41,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:41,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:41,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:41,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:41,315 INFO L87 Difference]: Start difference. First operand 2105 states and 7346 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:41,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:41,540 INFO L93 Difference]: Finished difference Result 2351 states and 7946 transitions. [2021-06-05 21:13:41,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:13:41,540 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-06-05 21:13:41,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:41,543 INFO L225 Difference]: With dead ends: 2351 [2021-06-05 21:13:41,543 INFO L226 Difference]: Without dead ends: 2326 [2021-06-05 21:13:41,543 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 21:13:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-06-05 21:13:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 2123. [2021-06-05 21:13:41,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 3.486804901036758) internal successors, (7399), 2122 states have internal predecessors, (7399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:41,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 7399 transitions. [2021-06-05 21:13:41,576 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 7399 transitions. Word has length 21 [2021-06-05 21:13:41,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:41,576 INFO L482 AbstractCegarLoop]: Abstraction has 2123 states and 7399 transitions. [2021-06-05 21:13:41,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:41,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 7399 transitions. [2021-06-05 21:13:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:41,579 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:41,579 INFO L554 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 21:13:41,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 21:13:41,779 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:41,780 INFO L82 PathProgramCache]: Analyzing trace with hash 727013536, now seen corresponding path program 4 times [2021-06-05 21:13:41,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:41,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118409409] [2021-06-05 21:13:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:41,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:41,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:41,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118409409] [2021-06-05 21:13:41,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118409409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:41,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484816041] [2021-06-05 21:13:41,816 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 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 21:13:41,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:41,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:41,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:13:41,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:41,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484816041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:41,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:41,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:13:41,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124080691] [2021-06-05 21:13:41,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:13:41,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:41,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:13:41,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:13:41,914 INFO L87 Difference]: Start difference. First operand 2123 states and 7399 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:42,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:42,187 INFO L93 Difference]: Finished difference Result 2859 states and 9694 transitions. [2021-06-05 21:13:42,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:13:42,188 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:42,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:42,191 INFO L225 Difference]: With dead ends: 2859 [2021-06-05 21:13:42,191 INFO L226 Difference]: Without dead ends: 2859 [2021-06-05 21:13:42,191 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:42,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2021-06-05 21:13:42,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2081. [2021-06-05 21:13:42,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 3.4894230769230767) internal successors, (7258), 2080 states have internal predecessors, (7258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:42,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7258 transitions. [2021-06-05 21:13:42,216 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7258 transitions. Word has length 21 [2021-06-05 21:13:42,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:42,216 INFO L482 AbstractCegarLoop]: Abstraction has 2081 states and 7258 transitions. [2021-06-05 21:13:42,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:42,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7258 transitions. [2021-06-05 21:13:42,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:42,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:42,219 INFO L554 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 21:13:42,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:42,433 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:42,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:42,433 INFO L82 PathProgramCache]: Analyzing trace with hash 224706792, now seen corresponding path program 5 times [2021-06-05 21:13:42,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:42,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317881973] [2021-06-05 21:13:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:42,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:42,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:42,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317881973] [2021-06-05 21:13:42,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317881973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:42,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130006583] [2021-06-05 21:13:42,480 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 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 21:13:42,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:13:42,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:42,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:13:42,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:42,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130006583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:42,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:42,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:13:42,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434593599] [2021-06-05 21:13:42,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:13:42,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:42,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:13:42,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:13:42,573 INFO L87 Difference]: Start difference. First operand 2081 states and 7258 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:42,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:42,974 INFO L93 Difference]: Finished difference Result 3288 states and 11038 transitions. [2021-06-05 21:13:42,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:13:42,974 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:42,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:42,978 INFO L225 Difference]: With dead ends: 3288 [2021-06-05 21:13:42,978 INFO L226 Difference]: Without dead ends: 3288 [2021-06-05 21:13:42,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 285.1ms TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:13:42,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3288 states. [2021-06-05 21:13:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3288 to 2090. [2021-06-05 21:13:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 2089 states have (on average 3.4897079942556246) internal successors, (7290), 2089 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 7290 transitions. [2021-06-05 21:13:43,005 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 7290 transitions. Word has length 21 [2021-06-05 21:13:43,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:43,005 INFO L482 AbstractCegarLoop]: Abstraction has 2090 states and 7290 transitions. [2021-06-05 21:13:43,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:43,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 7290 transitions. [2021-06-05 21:13:43,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:43,008 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:43,008 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:43,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 21:13:43,209 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:43,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:43,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1282893464, now seen corresponding path program 9 times [2021-06-05 21:13:43,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:43,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663622939] [2021-06-05 21:13:43,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:43,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:43,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663622939] [2021-06-05 21:13:43,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663622939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:43,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872274502] [2021-06-05 21:13:43,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:43,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:13:43,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:43,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:43,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:43,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872274502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:43,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:43,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:43,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887951540] [2021-06-05 21:13:43,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:43,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:43,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:43,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:43,335 INFO L87 Difference]: Start difference. First operand 2090 states and 7290 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:43,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:43,520 INFO L93 Difference]: Finished difference Result 2228 states and 7639 transitions. [2021-06-05 21:13:43,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:13:43,521 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-06-05 21:13:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:43,523 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 21:13:43,523 INFO L226 Difference]: Without dead ends: 2228 [2021-06-05 21:13:43,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:13:43,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-05 21:13:43,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2098. [2021-06-05 21:13:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 3.4859322842155462) internal successors, (7310), 2097 states have internal predecessors, (7310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:43,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 7310 transitions. [2021-06-05 21:13:43,546 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 7310 transitions. Word has length 21 [2021-06-05 21:13:43,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:43,546 INFO L482 AbstractCegarLoop]: Abstraction has 2098 states and 7310 transitions. [2021-06-05 21:13:43,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:43,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 7310 transitions. [2021-06-05 21:13:43,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:43,549 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:43,549 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:43,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 21:13:43,765 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:43,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:43,765 INFO L82 PathProgramCache]: Analyzing trace with hash -834635104, now seen corresponding path program 10 times [2021-06-05 21:13:43,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:43,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983068435] [2021-06-05 21:13:43,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:43,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:43,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983068435] [2021-06-05 21:13:43,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983068435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:43,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539264203] [2021-06-05 21:13:43,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:13:43,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:43,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:43,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:43,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:43,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:43,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539264203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:43,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:43,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:43,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523971049] [2021-06-05 21:13:43,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:43,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:43,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:43,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:43,892 INFO L87 Difference]: Start difference. First operand 2098 states and 7310 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:44,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:44,160 INFO L93 Difference]: Finished difference Result 2423 states and 8095 transitions. [2021-06-05 21:13:44,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:13:44,160 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-06-05 21:13:44,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:44,163 INFO L225 Difference]: With dead ends: 2423 [2021-06-05 21:13:44,163 INFO L226 Difference]: Without dead ends: 2423 [2021-06-05 21:13:44,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:13:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2021-06-05 21:13:44,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2098. [2021-06-05 21:13:44,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2098 states, 2097 states have (on average 3.4859322842155462) internal successors, (7310), 2097 states have internal predecessors, (7310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:44,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 7310 transitions. [2021-06-05 21:13:44,187 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 7310 transitions. Word has length 21 [2021-06-05 21:13:44,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:44,188 INFO L482 AbstractCegarLoop]: Abstraction has 2098 states and 7310 transitions. [2021-06-05 21:13:44,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:44,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 7310 transitions. [2021-06-05 21:13:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:44,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:44,190 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:44,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 21:13:44,391 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:44,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:44,391 INFO L82 PathProgramCache]: Analyzing trace with hash -961510752, now seen corresponding path program 11 times [2021-06-05 21:13:44,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:44,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416038188] [2021-06-05 21:13:44,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:44,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:44,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416038188] [2021-06-05 21:13:44,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416038188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:44,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621021562] [2021-06-05 21:13:44,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:44,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:44,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:44,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:44,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:44,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621021562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:44,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:44,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:44,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157190799] [2021-06-05 21:13:44,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:44,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:44,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:44,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:44,534 INFO L87 Difference]: Start difference. First operand 2098 states and 7310 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:44,761 INFO L93 Difference]: Finished difference Result 2354 states and 7928 transitions. [2021-06-05 21:13:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:13:44,761 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21 [2021-06-05 21:13:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:44,764 INFO L225 Difference]: With dead ends: 2354 [2021-06-05 21:13:44,764 INFO L226 Difference]: Without dead ends: 2347 [2021-06-05 21:13:44,764 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 156.7ms TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:44,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-06-05 21:13:44,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2082. [2021-06-05 21:13:44,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 2081 states have (on average 3.4915905814512254) internal successors, (7266), 2081 states have internal predecessors, (7266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:44,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 7266 transitions. [2021-06-05 21:13:44,788 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 7266 transitions. Word has length 21 [2021-06-05 21:13:44,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:44,788 INFO L482 AbstractCegarLoop]: Abstraction has 2082 states and 7266 transitions. [2021-06-05 21:13:44,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 21:13:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 7266 transitions. [2021-06-05 21:13:44,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:44,791 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:44,791 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:44,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 21:13:44,992 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:44,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:44,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1953121252, now seen corresponding path program 12 times [2021-06-05 21:13:44,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:44,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694956925] [2021-06-05 21:13:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:45,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:45,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694956925] [2021-06-05 21:13:45,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694956925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:45,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539288711] [2021-06-05 21:13:45,025 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:13:45,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:13:45,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:45,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:45,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:45,123 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:45,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539288711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:45,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:45,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:45,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70235403] [2021-06-05 21:13:45,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:45,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:45,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:45,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:45,123 INFO L87 Difference]: Start difference. First operand 2082 states and 7266 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:45,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:45,327 INFO L93 Difference]: Finished difference Result 2181 states and 7519 transitions. [2021-06-05 21:13:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:13:45,327 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21 [2021-06-05 21:13:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:45,330 INFO L225 Difference]: With dead ends: 2181 [2021-06-05 21:13:45,330 INFO L226 Difference]: Without dead ends: 2181 [2021-06-05 21:13:45,330 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:13:45,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-06-05 21:13:45,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2064. [2021-06-05 21:13:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 3.4944255937954436) internal successors, (7209), 2063 states have internal predecessors, (7209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:45,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 7209 transitions. [2021-06-05 21:13:45,352 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 7209 transitions. Word has length 21 [2021-06-05 21:13:45,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:45,352 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 7209 transitions. [2021-06-05 21:13:45,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:13:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 7209 transitions. [2021-06-05 21:13:45,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:45,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:45,355 INFO L554 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 21:13:45,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:45,556 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:45,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:45,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1895235168, now seen corresponding path program 6 times [2021-06-05 21:13:45,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:45,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979385704] [2021-06-05 21:13:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:45,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:45,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979385704] [2021-06-05 21:13:45,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979385704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:45,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614728812] [2021-06-05 21:13:45,587 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:45,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:13:45,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:45,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:13:45,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:45,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614728812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:45,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:45,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 21:13:45,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049445401] [2021-06-05 21:13:45,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:13:45,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:45,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:13:45,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:13:45,677 INFO L87 Difference]: Start difference. First operand 2064 states and 7209 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:45,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:45,859 INFO L93 Difference]: Finished difference Result 3061 states and 10214 transitions. [2021-06-05 21:13:45,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:13:45,860 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 21:13:45,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:45,863 INFO L225 Difference]: With dead ends: 3061 [2021-06-05 21:13:45,863 INFO L226 Difference]: Without dead ends: 3051 [2021-06-05 21:13:45,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:13:45,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-06-05 21:13:45,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2064. [2021-06-05 21:13:45,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 3.4886088221037324) internal successors, (7197), 2063 states have internal predecessors, (7197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 7197 transitions. [2021-06-05 21:13:45,890 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 7197 transitions. Word has length 21 [2021-06-05 21:13:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:45,890 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 7197 transitions. [2021-06-05 21:13:45,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:45,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 7197 transitions. [2021-06-05 21:13:45,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:45,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:45,893 INFO L554 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 21:13:46,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 21:13:46,105 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:46,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:46,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2061332650, now seen corresponding path program 7 times [2021-06-05 21:13:46,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:46,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267990619] [2021-06-05 21:13:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:46,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:46,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267990619] [2021-06-05 21:13:46,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267990619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:46,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874231561] [2021-06-05 21:13:46,133 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 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 21:13:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:46,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:13:46,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:46,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874231561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:46,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:46,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:13:46,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587282615] [2021-06-05 21:13:46,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:13:46,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:46,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:13:46,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:13:46,225 INFO L87 Difference]: Start difference. First operand 2064 states and 7197 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 21:13:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:46,792 INFO L93 Difference]: Finished difference Result 3794 states and 12391 transitions. [2021-06-05 21:13:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:13:46,792 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 21 [2021-06-05 21:13:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:46,796 INFO L225 Difference]: With dead ends: 3794 [2021-06-05 21:13:46,797 INFO L226 Difference]: Without dead ends: 3786 [2021-06-05 21:13:46,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 442.6ms TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:13:46,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2021-06-05 21:13:46,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 2066. [2021-06-05 21:13:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 3.486682808716707) internal successors, (7200), 2065 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:46,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 7200 transitions. [2021-06-05 21:13:46,827 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 7200 transitions. Word has length 21 [2021-06-05 21:13:46,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:46,827 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 7200 transitions. [2021-06-05 21:13:46,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 21:13:46,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 7200 transitions. [2021-06-05 21:13:46,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:46,830 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:46,830 INFO L554 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 21:13:47,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 21:13:47,031 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:47,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:47,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1082775206, now seen corresponding path program 8 times [2021-06-05 21:13:47,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:47,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119752924] [2021-06-05 21:13:47,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:47,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:47,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119752924] [2021-06-05 21:13:47,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119752924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:47,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804245597] [2021-06-05 21:13:47,061 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:47,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:47,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:47,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:13:47,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:47,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804245597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:47,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:47,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:13:47,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438595771] [2021-06-05 21:13:47,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:13:47,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:47,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:13:47,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:13:47,155 INFO L87 Difference]: Start difference. First operand 2066 states and 7200 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:47,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:47,674 INFO L93 Difference]: Finished difference Result 3972 states and 13104 transitions. [2021-06-05 21:13:47,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:13:47,675 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:47,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:47,679 INFO L225 Difference]: With dead ends: 3972 [2021-06-05 21:13:47,680 INFO L226 Difference]: Without dead ends: 3972 [2021-06-05 21:13:47,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 411.0ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:13:47,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3972 states. [2021-06-05 21:13:47,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3972 to 2066. [2021-06-05 21:13:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2066 states, 2065 states have (on average 3.486682808716707) internal successors, (7200), 2065 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2066 states to 2066 states and 7200 transitions. [2021-06-05 21:13:47,710 INFO L78 Accepts]: Start accepts. Automaton has 2066 states and 7200 transitions. Word has length 21 [2021-06-05 21:13:47,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:47,711 INFO L482 AbstractCegarLoop]: Abstraction has 2066 states and 7200 transitions. [2021-06-05 21:13:47,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:47,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2066 states and 7200 transitions. [2021-06-05 21:13:47,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:47,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:47,713 INFO L554 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 21:13:47,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:47,918 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:47,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:47,918 INFO L82 PathProgramCache]: Analyzing trace with hash 939943326, now seen corresponding path program 9 times [2021-06-05 21:13:47,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:47,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791224007] [2021-06-05 21:13:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:47,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:47,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:47,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791224007] [2021-06-05 21:13:47,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791224007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:47,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077144533] [2021-06-05 21:13:47,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:47,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 21:13:47,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:47,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:13:47,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:48,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077144533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:48,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:48,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:13:48,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401649420] [2021-06-05 21:13:48,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:13:48,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:48,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:13:48,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:13:48,058 INFO L87 Difference]: Start difference. First operand 2066 states and 7200 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 21:13:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:48,402 INFO L93 Difference]: Finished difference Result 3234 states and 10703 transitions. [2021-06-05 21:13:48,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:13:48,402 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 21 [2021-06-05 21:13:48,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:48,406 INFO L225 Difference]: With dead ends: 3234 [2021-06-05 21:13:48,406 INFO L226 Difference]: Without dead ends: 3226 [2021-06-05 21:13:48,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:13:48,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-05 21:13:48,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2062. [2021-06-05 21:13:48,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 3.487627365356623) internal successors, (7188), 2061 states have internal predecessors, (7188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 7188 transitions. [2021-06-05 21:13:48,436 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 7188 transitions. Word has length 21 [2021-06-05 21:13:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:48,436 INFO L482 AbstractCegarLoop]: Abstraction has 2062 states and 7188 transitions. [2021-06-05 21:13:48,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 21:13:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 7188 transitions. [2021-06-05 21:13:48,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:48,439 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:48,439 INFO L554 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 21:13:48,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 21:13:48,640 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:48,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:48,640 INFO L82 PathProgramCache]: Analyzing trace with hash -2053845986, now seen corresponding path program 10 times [2021-06-05 21:13:48,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:48,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777897208] [2021-06-05 21:13:48,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:48,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:48,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:48,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777897208] [2021-06-05 21:13:48,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777897208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:48,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574351779] [2021-06-05 21:13:48,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:48,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:48,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:48,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:13:48,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:48,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574351779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:48,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:48,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 21:13:48,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6965954] [2021-06-05 21:13:48,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:13:48,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:48,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:13:48,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:13:48,792 INFO L87 Difference]: Start difference. First operand 2062 states and 7188 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:49,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:49,040 INFO L93 Difference]: Finished difference Result 3086 states and 10253 transitions. [2021-06-05 21:13:49,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:13:49,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 21:13:49,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:49,044 INFO L225 Difference]: With dead ends: 3086 [2021-06-05 21:13:49,044 INFO L226 Difference]: Without dead ends: 3074 [2021-06-05 21:13:49,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:13:49,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-06-05 21:13:49,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 2060. [2021-06-05 21:13:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2060 states, 2059 states have (on average 3.4890723652258377) internal successors, (7184), 2059 states have internal predecessors, (7184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:49,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 7184 transitions. [2021-06-05 21:13:49,071 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 7184 transitions. Word has length 21 [2021-06-05 21:13:49,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:49,071 INFO L482 AbstractCegarLoop]: Abstraction has 2060 states and 7184 transitions. [2021-06-05 21:13:49,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:49,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 7184 transitions. [2021-06-05 21:13:49,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:49,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:49,074 INFO L554 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 21:13:49,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:49,274 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:49,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:49,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2052223966, now seen corresponding path program 11 times [2021-06-05 21:13:49,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:49,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545238070] [2021-06-05 21:13:49,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:49,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:49,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545238070] [2021-06-05 21:13:49,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545238070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:49,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846035696] [2021-06-05 21:13:49,308 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 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 21:13:49,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:13:49,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:49,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:13:49,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:49,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:49,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846035696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:49,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:49,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:13:49,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897916249] [2021-06-05 21:13:49,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:13:49,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:49,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:13:49,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:13:49,418 INFO L87 Difference]: Start difference. First operand 2060 states and 7184 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:49,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:49,892 INFO L93 Difference]: Finished difference Result 3522 states and 11795 transitions. [2021-06-05 21:13:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:13:49,892 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:49,896 INFO L225 Difference]: With dead ends: 3522 [2021-06-05 21:13:49,896 INFO L226 Difference]: Without dead ends: 3522 [2021-06-05 21:13:49,896 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 376.5ms TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:13:49,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3522 states. [2021-06-05 21:13:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3522 to 2059. [2021-06-05 21:13:49,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 2058 states have (on average 3.4863945578231292) internal successors, (7175), 2058 states have internal predecessors, (7175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:49,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 7175 transitions. [2021-06-05 21:13:49,924 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 7175 transitions. Word has length 21 [2021-06-05 21:13:49,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:49,924 INFO L482 AbstractCegarLoop]: Abstraction has 2059 states and 7175 transitions. [2021-06-05 21:13:49,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 21:13:49,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 7175 transitions. [2021-06-05 21:13:49,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 21:13:49,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:49,927 INFO L554 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 21:13:50,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 21:13:50,128 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:50,128 INFO L82 PathProgramCache]: Analyzing trace with hash 122801370, now seen corresponding path program 12 times [2021-06-05 21:13:50,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:50,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718056399] [2021-06-05 21:13:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:50,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:50,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718056399] [2021-06-05 21:13:50,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718056399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:50,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638499115] [2021-06-05 21:13:50,162 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 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 21:13:50,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 21:13:50,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:50,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 21:13:50,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:50,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638499115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:50,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:50,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-05 21:13:50,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329277179] [2021-06-05 21:13:50,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:13:50,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:50,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:13:50,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:13:50,245 INFO L87 Difference]: Start difference. First operand 2059 states and 7175 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:50,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:50,674 INFO L93 Difference]: Finished difference Result 3352 states and 11113 transitions. [2021-06-05 21:13:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:13:50,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 21:13:50,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:50,679 INFO L225 Difference]: With dead ends: 3352 [2021-06-05 21:13:50,679 INFO L226 Difference]: Without dead ends: 3342 [2021-06-05 21:13:50,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 352.6ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-06-05 21:13:50,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2021-06-05 21:13:50,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 2050. [2021-06-05 21:13:50,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 2049 states have (on average 3.486090775988287) internal successors, (7143), 2049 states have internal predecessors, (7143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:50,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 7143 transitions. [2021-06-05 21:13:50,709 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 7143 transitions. Word has length 21 [2021-06-05 21:13:50,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:50,709 INFO L482 AbstractCegarLoop]: Abstraction has 2050 states and 7143 transitions. [2021-06-05 21:13:50,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:50,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 7143 transitions. [2021-06-05 21:13:50,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:50,712 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:50,712 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:50,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:50,925 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:50,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:50,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1465137408, now seen corresponding path program 20 times [2021-06-05 21:13:50,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:50,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6250249] [2021-06-05 21:13:50,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:50,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:50,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6250249] [2021-06-05 21:13:50,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6250249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:50,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588743895] [2021-06-05 21:13:50,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:13:51,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:51,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:51,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:13:51,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:51,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588743895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:51,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:51,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:51,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518691459] [2021-06-05 21:13:51,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:51,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:51,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:51,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:51,152 INFO L87 Difference]: Start difference. First operand 2050 states and 7143 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:51,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:51,347 INFO L93 Difference]: Finished difference Result 2694 states and 9038 transitions. [2021-06-05 21:13:51,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:13:51,347 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:51,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:51,351 INFO L225 Difference]: With dead ends: 2694 [2021-06-05 21:13:51,351 INFO L226 Difference]: Without dead ends: 2664 [2021-06-05 21:13:51,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 184.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:51,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-06-05 21:13:51,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2237. [2021-06-05 21:13:51,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 3.4910554561717353) internal successors, (7806), 2236 states have internal predecessors, (7806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:51,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 7806 transitions. [2021-06-05 21:13:51,377 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 7806 transitions. Word has length 23 [2021-06-05 21:13:51,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:51,377 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 7806 transitions. [2021-06-05 21:13:51,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:51,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 7806 transitions. [2021-06-05 21:13:51,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:51,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:51,380 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:51,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 21:13:51,580 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:51,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:51,580 INFO L82 PathProgramCache]: Analyzing trace with hash 69803706, now seen corresponding path program 21 times [2021-06-05 21:13:51,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:51,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647675610] [2021-06-05 21:13:51,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:13:51,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:51,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647675610] [2021-06-05 21:13:51,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647675610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:51,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445647284] [2021-06-05 21:13:51,629 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 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 21:13:51,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:13:51,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:51,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:13:51,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:51,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445647284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:51,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:51,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:51,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979757121] [2021-06-05 21:13:51,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:51,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:51,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:51,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:51,752 INFO L87 Difference]: Start difference. First operand 2237 states and 7806 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:51,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:51,909 INFO L93 Difference]: Finished difference Result 3253 states and 10967 transitions. [2021-06-05 21:13:51,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:13:51,910 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:51,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:51,914 INFO L225 Difference]: With dead ends: 3253 [2021-06-05 21:13:51,914 INFO L226 Difference]: Without dead ends: 3183 [2021-06-05 21:13:51,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:51,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3183 states. [2021-06-05 21:13:51,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3183 to 2645. [2021-06-05 21:13:51,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2644 states have (on average 3.5155068078668683) internal successors, (9295), 2644 states have internal predecessors, (9295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:51,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 9295 transitions. [2021-06-05 21:13:51,947 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 9295 transitions. Word has length 23 [2021-06-05 21:13:51,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:51,947 INFO L482 AbstractCegarLoop]: Abstraction has 2645 states and 9295 transitions. [2021-06-05 21:13:51,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 9295 transitions. [2021-06-05 21:13:51,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:51,951 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:51,951 INFO L554 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 21:13:52,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 21:13:52,151 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:52,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:52,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1354898098, now seen corresponding path program 13 times [2021-06-05 21:13:52,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:52,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402840447] [2021-06-05 21:13:52,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:52,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:52,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:52,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402840447] [2021-06-05 21:13:52,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402840447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:52,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375529823] [2021-06-05 21:13:52,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:52,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:13:52,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:52,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375529823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:52,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:52,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:52,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484786536] [2021-06-05 21:13:52,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:52,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:52,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:52,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:52,294 INFO L87 Difference]: Start difference. First operand 2645 states and 9295 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:52,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:52,423 INFO L93 Difference]: Finished difference Result 3798 states and 12972 transitions. [2021-06-05 21:13:52,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:13:52,423 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:52,430 INFO L225 Difference]: With dead ends: 3798 [2021-06-05 21:13:52,430 INFO L226 Difference]: Without dead ends: 3768 [2021-06-05 21:13:52,430 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:52,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2021-06-05 21:13:52,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3007. [2021-06-05 21:13:52,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3007 states, 3006 states have (on average 3.5449101796407185) internal successors, (10656), 3006 states have internal predecessors, (10656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:52,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3007 states to 3007 states and 10656 transitions. [2021-06-05 21:13:52,468 INFO L78 Accepts]: Start accepts. Automaton has 3007 states and 10656 transitions. Word has length 23 [2021-06-05 21:13:52,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:52,468 INFO L482 AbstractCegarLoop]: Abstraction has 3007 states and 10656 transitions. [2021-06-05 21:13:52,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:52,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3007 states and 10656 transitions. [2021-06-05 21:13:52,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:52,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:52,472 INFO L554 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 21:13:52,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 21:13:52,672 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:52,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:52,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1874831856, now seen corresponding path program 14 times [2021-06-05 21:13:52,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:52,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496133855] [2021-06-05 21:13:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:52,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:52,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496133855] [2021-06-05 21:13:52,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496133855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:52,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349497911] [2021-06-05 21:13:52,716 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 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 21:13:52,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:52,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:52,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:13:52,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:52,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349497911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:52,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:52,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:52,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828136963] [2021-06-05 21:13:52,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:52,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:52,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:52,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:52,824 INFO L87 Difference]: Start difference. First operand 3007 states and 10656 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:52,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:52,949 INFO L93 Difference]: Finished difference Result 3887 states and 13425 transitions. [2021-06-05 21:13:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 21:13:52,949 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:52,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:52,954 INFO L225 Difference]: With dead ends: 3887 [2021-06-05 21:13:52,954 INFO L226 Difference]: Without dead ends: 3835 [2021-06-05 21:13:52,954 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:52,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3835 states. [2021-06-05 21:13:52,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3835 to 3265. [2021-06-05 21:13:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3265 states, 3264 states have (on average 3.549019607843137) internal successors, (11584), 3264 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:52,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3265 states to 3265 states and 11584 transitions. [2021-06-05 21:13:52,994 INFO L78 Accepts]: Start accepts. Automaton has 3265 states and 11584 transitions. Word has length 23 [2021-06-05 21:13:52,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:52,994 INFO L482 AbstractCegarLoop]: Abstraction has 3265 states and 11584 transitions. [2021-06-05 21:13:52,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3265 states and 11584 transitions. [2021-06-05 21:13:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:52,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:52,998 INFO L554 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 21:13:53,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 21:13:53,199 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:53,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:53,199 INFO L82 PathProgramCache]: Analyzing trace with hash -50344256, now seen corresponding path program 15 times [2021-06-05 21:13:53,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:53,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112764320] [2021-06-05 21:13:53,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:53,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:53,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112764320] [2021-06-05 21:13:53,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112764320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:53,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37687743] [2021-06-05 21:13:53,268 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 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 21:13:53,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:13:53,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:53,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:13:53,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:53,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37687743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:53,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:53,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:53,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92090321] [2021-06-05 21:13:53,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:53,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:53,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:53,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:53,368 INFO L87 Difference]: Start difference. First operand 3265 states and 11584 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:53,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:53,471 INFO L93 Difference]: Finished difference Result 3597 states and 12578 transitions. [2021-06-05 21:13:53,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:13:53,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:53,476 INFO L225 Difference]: With dead ends: 3597 [2021-06-05 21:13:53,476 INFO L226 Difference]: Without dead ends: 3567 [2021-06-05 21:13:53,476 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:53,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3567 states. [2021-06-05 21:13:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3567 to 3319. [2021-06-05 21:13:53,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 3318 states have (on average 3.5491259795057264) internal successors, (11776), 3318 states have internal predecessors, (11776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:53,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 11776 transitions. [2021-06-05 21:13:53,525 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 11776 transitions. Word has length 23 [2021-06-05 21:13:53,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:53,526 INFO L482 AbstractCegarLoop]: Abstraction has 3319 states and 11776 transitions. [2021-06-05 21:13:53,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:53,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 11776 transitions. [2021-06-05 21:13:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:53,530 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:53,530 INFO L554 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 21:13:53,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 21:13:53,737 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:53,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1087752272, now seen corresponding path program 16 times [2021-06-05 21:13:53,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:53,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071843586] [2021-06-05 21:13:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:53,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:53,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:53,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071843586] [2021-06-05 21:13:53,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071843586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:53,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678476082] [2021-06-05 21:13:53,784 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 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 21:13:53,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:53,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:53,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:13:53,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:53,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:53,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678476082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:53,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:53,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:53,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516332673] [2021-06-05 21:13:53,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:53,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:53,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:53,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:53,883 INFO L87 Difference]: Start difference. First operand 3319 states and 11776 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:54,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:54,026 INFO L93 Difference]: Finished difference Result 3599 states and 12594 transitions. [2021-06-05 21:13:54,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 21:13:54,026 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:54,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:54,031 INFO L225 Difference]: With dead ends: 3599 [2021-06-05 21:13:54,031 INFO L226 Difference]: Without dead ends: 3569 [2021-06-05 21:13:54,031 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:13:54,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2021-06-05 21:13:54,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 3339. [2021-06-05 21:13:54,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3339 states, 3338 states have (on average 3.5452366686638705) internal successors, (11834), 3338 states have internal predecessors, (11834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:54,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3339 states to 3339 states and 11834 transitions. [2021-06-05 21:13:54,069 INFO L78 Accepts]: Start accepts. Automaton has 3339 states and 11834 transitions. Word has length 23 [2021-06-05 21:13:54,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:54,069 INFO L482 AbstractCegarLoop]: Abstraction has 3339 states and 11834 transitions. [2021-06-05 21:13:54,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:54,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3339 states and 11834 transitions. [2021-06-05 21:13:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:54,073 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:54,073 INFO L554 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 21:13:54,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-05 21:13:54,274 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:54,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:54,274 INFO L82 PathProgramCache]: Analyzing trace with hash 466923328, now seen corresponding path program 17 times [2021-06-05 21:13:54,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:54,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171870518] [2021-06-05 21:13:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:54,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:54,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171870518] [2021-06-05 21:13:54,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171870518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:54,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831025855] [2021-06-05 21:13:54,333 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 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 21:13:54,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:13:54,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:54,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:13:54,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:54,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:54,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831025855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:54,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:54,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:54,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941892417] [2021-06-05 21:13:54,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:54,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:54,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:54,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:54,437 INFO L87 Difference]: Start difference. First operand 3339 states and 11834 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:54,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:54,541 INFO L93 Difference]: Finished difference Result 3822 states and 13200 transitions. [2021-06-05 21:13:54,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 21:13:54,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:54,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:54,546 INFO L225 Difference]: With dead ends: 3822 [2021-06-05 21:13:54,546 INFO L226 Difference]: Without dead ends: 3742 [2021-06-05 21:13:54,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:54,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2021-06-05 21:13:54,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3391. [2021-06-05 21:13:54,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3391 states, 3390 states have (on average 3.53952802359882) internal successors, (11999), 3390 states have internal predecessors, (11999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3391 states to 3391 states and 11999 transitions. [2021-06-05 21:13:54,588 INFO L78 Accepts]: Start accepts. Automaton has 3391 states and 11999 transitions. Word has length 23 [2021-06-05 21:13:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:54,588 INFO L482 AbstractCegarLoop]: Abstraction has 3391 states and 11999 transitions. [2021-06-05 21:13:54,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 3391 states and 11999 transitions. [2021-06-05 21:13:54,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 21:13:54,592 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:54,592 INFO L554 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 21:13:54,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:54,793 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:54,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:54,793 INFO L82 PathProgramCache]: Analyzing trace with hash 237981316, now seen corresponding path program 18 times [2021-06-05 21:13:54,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:54,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641575270] [2021-06-05 21:13:54,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:54,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:54,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641575270] [2021-06-05 21:13:54,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641575270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:54,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459716621] [2021-06-05 21:13:54,836 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 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 21:13:54,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:13:54,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:54,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 21:13:54,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:54,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459716621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:54,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:54,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:13:54,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215771591] [2021-06-05 21:13:54,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:13:54,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:54,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:13:54,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:13:54,926 INFO L87 Difference]: Start difference. First operand 3391 states and 11999 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:55,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:55,090 INFO L93 Difference]: Finished difference Result 4400 states and 15094 transitions. [2021-06-05 21:13:55,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:13:55,090 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 21:13:55,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:55,096 INFO L225 Difference]: With dead ends: 4400 [2021-06-05 21:13:55,096 INFO L226 Difference]: Without dead ends: 4355 [2021-06-05 21:13:55,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:13:55,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4355 states. [2021-06-05 21:13:55,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4355 to 3682. [2021-06-05 21:13:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 3.556370551480576) internal successors, (13091), 3681 states have internal predecessors, (13091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 13091 transitions. [2021-06-05 21:13:55,162 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 13091 transitions. Word has length 23 [2021-06-05 21:13:55,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:55,162 INFO L482 AbstractCegarLoop]: Abstraction has 3682 states and 13091 transitions. [2021-06-05 21:13:55,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:55,162 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 13091 transitions. [2021-06-05 21:13:55,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:13:55,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:55,166 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:55,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:55,368 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:55,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:55,368 INFO L82 PathProgramCache]: Analyzing trace with hash 290682850, now seen corresponding path program 22 times [2021-06-05 21:13:55,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:55,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221391251] [2021-06-05 21:13:55,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:55,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:55,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221391251] [2021-06-05 21:13:55,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221391251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:55,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956999535] [2021-06-05 21:13:55,398 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:13:55,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:13:55,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:55,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:13:55,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:55,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956999535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:55,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:55,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:13:55,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065266242] [2021-06-05 21:13:55,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:13:55,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:55,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:13:55,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:55,503 INFO L87 Difference]: Start difference. First operand 3682 states and 13091 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:13:55,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:55,721 INFO L93 Difference]: Finished difference Result 6019 states and 20295 transitions. [2021-06-05 21:13:55,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:13:55,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 25 [2021-06-05 21:13:55,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:55,731 INFO L225 Difference]: With dead ends: 6019 [2021-06-05 21:13:55,731 INFO L226 Difference]: Without dead ends: 6019 [2021-06-05 21:13:55,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:13:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6019 states. [2021-06-05 21:13:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6019 to 4114. [2021-06-05 21:13:55,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4114 states, 4113 states have (on average 3.573547289083394) internal successors, (14698), 4113 states have internal predecessors, (14698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4114 states to 4114 states and 14698 transitions. [2021-06-05 21:13:55,793 INFO L78 Accepts]: Start accepts. Automaton has 4114 states and 14698 transitions. Word has length 25 [2021-06-05 21:13:55,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:55,793 INFO L482 AbstractCegarLoop]: Abstraction has 4114 states and 14698 transitions. [2021-06-05 21:13:55,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:13:55,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4114 states and 14698 transitions. [2021-06-05 21:13:55,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:13:55,798 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:55,798 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:55,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:55,998 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:55,999 INFO L82 PathProgramCache]: Analyzing trace with hash -717425812, now seen corresponding path program 19 times [2021-06-05 21:13:55,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:55,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556234167] [2021-06-05 21:13:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:56,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:56,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556234167] [2021-06-05 21:13:56,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556234167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:56,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373983856] [2021-06-05 21:13:56,032 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 21:13:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:56,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:13:56,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:56,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373983856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:56,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:56,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:13:56,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682467301] [2021-06-05 21:13:56,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:13:56,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:56,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:13:56,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:56,164 INFO L87 Difference]: Start difference. First operand 4114 states and 14698 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:56,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:56,581 INFO L93 Difference]: Finished difference Result 6055 states and 21073 transitions. [2021-06-05 21:13:56,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:13:56,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:13:56,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:56,589 INFO L225 Difference]: With dead ends: 6055 [2021-06-05 21:13:56,589 INFO L226 Difference]: Without dead ends: 6055 [2021-06-05 21:13:56,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:13:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6055 states. [2021-06-05 21:13:56,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6055 to 4326. [2021-06-05 21:13:56,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 4325 states have (on average 3.570173410404624) internal successors, (15441), 4325 states have internal predecessors, (15441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 15441 transitions. [2021-06-05 21:13:56,648 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 15441 transitions. Word has length 25 [2021-06-05 21:13:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:56,648 INFO L482 AbstractCegarLoop]: Abstraction has 4326 states and 15441 transitions. [2021-06-05 21:13:56,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:56,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 15441 transitions. [2021-06-05 21:13:56,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:13:56,653 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:56,653 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:56,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:56,854 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:56,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:56,854 INFO L82 PathProgramCache]: Analyzing trace with hash -433027746, now seen corresponding path program 23 times [2021-06-05 21:13:56,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:56,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278825458] [2021-06-05 21:13:56,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:56,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:56,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278825458] [2021-06-05 21:13:56,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278825458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:56,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641167913] [2021-06-05 21:13:56,888 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 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 21:13:56,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:13:56,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:56,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:13:56,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:57,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641167913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:57,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:57,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:13:57,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334833948] [2021-06-05 21:13:57,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:13:57,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:57,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:13:57,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:13:57,033 INFO L87 Difference]: Start difference. First operand 4326 states and 15441 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:58,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:13:58,748 INFO L93 Difference]: Finished difference Result 8944 states and 29175 transitions. [2021-06-05 21:13:58,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 21:13:58,749 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:13:58,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:13:58,760 INFO L225 Difference]: With dead ends: 8944 [2021-06-05 21:13:58,760 INFO L226 Difference]: Without dead ends: 8944 [2021-06-05 21:13:58,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 1370.5ms TimeCoverageRelationStatistics Valid=2336, Invalid=6784, Unknown=0, NotChecked=0, Total=9120 [2021-06-05 21:13:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8944 states. [2021-06-05 21:13:58,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8944 to 4865. [2021-06-05 21:13:58,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4865 states, 4864 states have (on average 3.591282894736842) internal successors, (17468), 4864 states have internal predecessors, (17468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:58,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4865 states to 4865 states and 17468 transitions. [2021-06-05 21:13:58,847 INFO L78 Accepts]: Start accepts. Automaton has 4865 states and 17468 transitions. Word has length 25 [2021-06-05 21:13:58,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:13:58,847 INFO L482 AbstractCegarLoop]: Abstraction has 4865 states and 17468 transitions. [2021-06-05 21:13:58,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:13:58,847 INFO L276 IsEmpty]: Start isEmpty. Operand 4865 states and 17468 transitions. [2021-06-05 21:13:58,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:13:58,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:13:58,853 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:13:59,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 21:13:59,068 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:13:59,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:13:59,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1844695458, now seen corresponding path program 20 times [2021-06-05 21:13:59,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:13:59,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440082169] [2021-06-05 21:13:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:13:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:13:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:59,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:13:59,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440082169] [2021-06-05 21:13:59,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440082169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:59,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545793353] [2021-06-05 21:13:59,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:13:59,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:13:59,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:13:59,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:13:59,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:13:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:13:59,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545793353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:13:59,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:13:59,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:13:59,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524203640] [2021-06-05 21:13:59,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:13:59,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:13:59,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:13:59,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:13:59,219 INFO L87 Difference]: Start difference. First operand 4865 states and 17468 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:14:00,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:00,250 INFO L93 Difference]: Finished difference Result 13448 states and 45266 transitions. [2021-06-05 21:14:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 21:14:00,252 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 25 [2021-06-05 21:14:00,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:00,274 INFO L225 Difference]: With dead ends: 13448 [2021-06-05 21:14:00,274 INFO L226 Difference]: Without dead ends: 13438 [2021-06-05 21:14:00,274 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 662.1ms TimeCoverageRelationStatistics Valid=773, Invalid=3133, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 21:14:00,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13438 states. [2021-06-05 21:14:00,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13438 to 6561. [2021-06-05 21:14:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6561 states, 6560 states have (on average 3.6759146341463413) internal successors, (24114), 6560 states have internal predecessors, (24114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6561 states to 6561 states and 24114 transitions. [2021-06-05 21:14:00,409 INFO L78 Accepts]: Start accepts. Automaton has 6561 states and 24114 transitions. Word has length 25 [2021-06-05 21:14:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:00,409 INFO L482 AbstractCegarLoop]: Abstraction has 6561 states and 24114 transitions. [2021-06-05 21:14:00,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:14:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 6561 states and 24114 transitions. [2021-06-05 21:14:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:00,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:00,418 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:00,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:00,618 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:00,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:00,619 INFO L82 PathProgramCache]: Analyzing trace with hash -866138014, now seen corresponding path program 21 times [2021-06-05 21:14:00,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:00,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798056872] [2021-06-05 21:14:00,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:00,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:00,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:00,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798056872] [2021-06-05 21:14:00,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798056872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:00,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217925966] [2021-06-05 21:14:00,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:00,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:14:00,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:00,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:14:00,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:00,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217925966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:00,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:00,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:14:00,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680823289] [2021-06-05 21:14:00,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:14:00,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:00,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:14:00,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:14:00,807 INFO L87 Difference]: Start difference. First operand 6561 states and 24114 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:01,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:01,760 INFO L93 Difference]: Finished difference Result 15900 states and 53109 transitions. [2021-06-05 21:14:01,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 21:14:01,760 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:01,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:01,821 INFO L225 Difference]: With dead ends: 15900 [2021-06-05 21:14:01,821 INFO L226 Difference]: Without dead ends: 15900 [2021-06-05 21:14:01,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 624.6ms TimeCoverageRelationStatistics Valid=679, Invalid=2401, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 21:14:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15900 states. [2021-06-05 21:14:01,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15900 to 5733. [2021-06-05 21:14:01,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5733 states, 5732 states have (on average 3.641486392184229) internal successors, (20873), 5732 states have internal predecessors, (20873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:01,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5733 states to 5733 states and 20873 transitions. [2021-06-05 21:14:01,982 INFO L78 Accepts]: Start accepts. Automaton has 5733 states and 20873 transitions. Word has length 25 [2021-06-05 21:14:01,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:01,982 INFO L482 AbstractCegarLoop]: Abstraction has 5733 states and 20873 transitions. [2021-06-05 21:14:01,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:01,982 INFO L276 IsEmpty]: Start isEmpty. Operand 5733 states and 20873 transitions. [2021-06-05 21:14:01,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:01,990 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:01,990 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:02,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 21:14:02,206 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:02,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:02,206 INFO L82 PathProgramCache]: Analyzing trace with hash -559903394, now seen corresponding path program 24 times [2021-06-05 21:14:02,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:02,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15152215] [2021-06-05 21:14:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:02,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:02,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15152215] [2021-06-05 21:14:02,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15152215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:02,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486309556] [2021-06-05 21:14:02,237 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 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 21:14:02,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:14:02,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:02,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:02,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:02,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486309556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:02,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:02,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:02,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861691305] [2021-06-05 21:14:02,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:02,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:02,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:02,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:02,365 INFO L87 Difference]: Start difference. First operand 5733 states and 20873 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:03,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:03,460 INFO L93 Difference]: Finished difference Result 8941 states and 29935 transitions. [2021-06-05 21:14:03,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 21:14:03,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:03,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:03,473 INFO L225 Difference]: With dead ends: 8941 [2021-06-05 21:14:03,474 INFO L226 Difference]: Without dead ends: 8913 [2021-06-05 21:14:03,474 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 843.5ms TimeCoverageRelationStatistics Valid=1142, Invalid=3148, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 21:14:03,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8913 states. [2021-06-05 21:14:03,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8913 to 5621. [2021-06-05 21:14:03,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5621 states, 5620 states have (on average 3.6487544483985763) internal successors, (20506), 5620 states have internal predecessors, (20506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5621 states to 5621 states and 20506 transitions. [2021-06-05 21:14:03,572 INFO L78 Accepts]: Start accepts. Automaton has 5621 states and 20506 transitions. Word has length 25 [2021-06-05 21:14:03,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:03,573 INFO L482 AbstractCegarLoop]: Abstraction has 5621 states and 20506 transitions. [2021-06-05 21:14:03,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:03,573 INFO L276 IsEmpty]: Start isEmpty. Operand 5621 states and 20506 transitions. [2021-06-05 21:14:03,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:03,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:03,580 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:03,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:03,781 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:03,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:03,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1898789474, now seen corresponding path program 25 times [2021-06-05 21:14:03,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:03,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431212608] [2021-06-05 21:14:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:03,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:03,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431212608] [2021-06-05 21:14:03,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431212608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:03,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095376766] [2021-06-05 21:14:03,813 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:14:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:03,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:03,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:03,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095376766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:03,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:03,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:03,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28868912] [2021-06-05 21:14:03,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:03,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:03,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:03,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:03,954 INFO L87 Difference]: Start difference. First operand 5621 states and 20506 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:04,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:04,906 INFO L93 Difference]: Finished difference Result 8862 states and 29798 transitions. [2021-06-05 21:14:04,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 21:14:04,906 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:04,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:04,918 INFO L225 Difference]: With dead ends: 8862 [2021-06-05 21:14:04,918 INFO L226 Difference]: Without dead ends: 8799 [2021-06-05 21:14:04,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 718.8ms TimeCoverageRelationStatistics Valid=820, Invalid=2372, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 21:14:04,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8799 states. [2021-06-05 21:14:05,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8799 to 5763. [2021-06-05 21:14:05,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5763 states, 5762 states have (on average 3.6336341548073587) internal successors, (20937), 5762 states have internal predecessors, (20937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:05,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5763 states to 5763 states and 20937 transitions. [2021-06-05 21:14:05,017 INFO L78 Accepts]: Start accepts. Automaton has 5763 states and 20937 transitions. Word has length 25 [2021-06-05 21:14:05,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:05,017 INFO L482 AbstractCegarLoop]: Abstraction has 5763 states and 20937 transitions. [2021-06-05 21:14:05,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:05,017 INFO L276 IsEmpty]: Start isEmpty. Operand 5763 states and 20937 transitions. [2021-06-05 21:14:05,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:05,025 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:05,025 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:05,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 21:14:05,229 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:05,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:05,229 INFO L82 PathProgramCache]: Analyzing trace with hash 92819810, now seen corresponding path program 26 times [2021-06-05 21:14:05,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:05,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525126527] [2021-06-05 21:14:05,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:05,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:05,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525126527] [2021-06-05 21:14:05,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525126527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:05,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127918003] [2021-06-05 21:14:05,265 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 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 21:14:05,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:05,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:05,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:05,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:05,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127918003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:05,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:05,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:05,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732238701] [2021-06-05 21:14:05,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:05,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:05,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:05,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:05,397 INFO L87 Difference]: Start difference. First operand 5763 states and 20937 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:06,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:06,108 INFO L93 Difference]: Finished difference Result 8860 states and 29919 transitions. [2021-06-05 21:14:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 21:14:06,108 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:06,121 INFO L225 Difference]: With dead ends: 8860 [2021-06-05 21:14:06,121 INFO L226 Difference]: Without dead ends: 8782 [2021-06-05 21:14:06,121 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 536.4ms TimeCoverageRelationStatistics Valid=645, Invalid=1905, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:14:06,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8782 states. [2021-06-05 21:14:06,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8782 to 5891. [2021-06-05 21:14:06,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5891 states, 5890 states have (on average 3.6220713073005095) internal successors, (21334), 5890 states have internal predecessors, (21334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:06,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5891 states to 5891 states and 21334 transitions. [2021-06-05 21:14:06,222 INFO L78 Accepts]: Start accepts. Automaton has 5891 states and 21334 transitions. Word has length 25 [2021-06-05 21:14:06,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:06,222 INFO L482 AbstractCegarLoop]: Abstraction has 5891 states and 21334 transitions. [2021-06-05 21:14:06,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 5891 states and 21334 transitions. [2021-06-05 21:14:06,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:06,229 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:06,229 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:06,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:06,430 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:06,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:06,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1612048410, now seen corresponding path program 27 times [2021-06-05 21:14:06,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:06,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180733442] [2021-06-05 21:14:06,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:06,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:06,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180733442] [2021-06-05 21:14:06,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180733442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:06,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360054172] [2021-06-05 21:14:06,473 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 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 21:14:06,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:14:06,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:06,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:06,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:06,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360054172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:06,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:06,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:06,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515465001] [2021-06-05 21:14:06,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:06,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:06,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:06,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:06,616 INFO L87 Difference]: Start difference. First operand 5891 states and 21334 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:08,278 INFO L93 Difference]: Finished difference Result 10662 states and 35698 transitions. [2021-06-05 21:14:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 21:14:08,279 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:08,294 INFO L225 Difference]: With dead ends: 10662 [2021-06-05 21:14:08,294 INFO L226 Difference]: Without dead ends: 10662 [2021-06-05 21:14:08,295 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 1258.8ms TimeCoverageRelationStatistics Valid=1899, Invalid=6111, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 21:14:08,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10662 states. [2021-06-05 21:14:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10662 to 6331. [2021-06-05 21:14:08,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6331 states, 6330 states have (on average 3.6642969984202214) internal successors, (23195), 6330 states have internal predecessors, (23195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:08,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6331 states to 6331 states and 23195 transitions. [2021-06-05 21:14:08,456 INFO L78 Accepts]: Start accepts. Automaton has 6331 states and 23195 transitions. Word has length 25 [2021-06-05 21:14:08,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:08,456 INFO L482 AbstractCegarLoop]: Abstraction has 6331 states and 23195 transitions. [2021-06-05 21:14:08,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:08,456 INFO L276 IsEmpty]: Start isEmpty. Operand 6331 states and 23195 transitions. [2021-06-05 21:14:08,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:08,465 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:08,465 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:08,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:08,665 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:08,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:08,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1485172762, now seen corresponding path program 28 times [2021-06-05 21:14:08,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:08,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958162041] [2021-06-05 21:14:08,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:08,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:08,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958162041] [2021-06-05 21:14:08,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958162041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:08,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175249941] [2021-06-05 21:14:08,691 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 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 21:14:08,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:08,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:08,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:08,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:08,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175249941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:08,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:08,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:08,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723670617] [2021-06-05 21:14:08,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:08,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:08,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:08,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:08,812 INFO L87 Difference]: Start difference. First operand 6331 states and 23195 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:09,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:09,714 INFO L93 Difference]: Finished difference Result 9366 states and 31774 transitions. [2021-06-05 21:14:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 21:14:09,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:14:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:09,728 INFO L225 Difference]: With dead ends: 9366 [2021-06-05 21:14:09,728 INFO L226 Difference]: Without dead ends: 9331 [2021-06-05 21:14:09,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 633.9ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 21:14:09,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9331 states. [2021-06-05 21:14:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9331 to 6323. [2021-06-05 21:14:09,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6323 states, 6322 states have (on average 3.6616577032584625) internal successors, (23149), 6322 states have internal predecessors, (23149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:09,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 23149 transitions. [2021-06-05 21:14:09,883 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 23149 transitions. Word has length 25 [2021-06-05 21:14:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:09,883 INFO L482 AbstractCegarLoop]: Abstraction has 6323 states and 23149 transitions. [2021-06-05 21:14:09,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:09,883 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 23149 transitions. [2021-06-05 21:14:09,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:09,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:09,892 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:10,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-06-05 21:14:10,092 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:10,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:10,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2024341986, now seen corresponding path program 29 times [2021-06-05 21:14:10,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:10,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292906486] [2021-06-05 21:14:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:10,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:10,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292906486] [2021-06-05 21:14:10,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292906486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:10,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746862884] [2021-06-05 21:14:10,124 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 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 21:14:10,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:14:10,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:10,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:10,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:10,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746862884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:10,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:10,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:10,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484427407] [2021-06-05 21:14:10,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:10,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:10,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:10,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:10,246 INFO L87 Difference]: Start difference. First operand 6323 states and 23149 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:11,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:11,875 INFO L93 Difference]: Finished difference Result 11065 states and 37330 transitions. [2021-06-05 21:14:11,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-06-05 21:14:11,875 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:11,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:11,891 INFO L225 Difference]: With dead ends: 11065 [2021-06-05 21:14:11,891 INFO L226 Difference]: Without dead ends: 11065 [2021-06-05 21:14:11,892 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 1153.2ms TimeCoverageRelationStatistics Valid=1921, Invalid=6089, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 21:14:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11065 states. [2021-06-05 21:14:11,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11065 to 6327. [2021-06-05 21:14:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6327 states, 6326 states have (on average 3.66645589630098) internal successors, (23194), 6326 states have internal predecessors, (23194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6327 states to 6327 states and 23194 transitions. [2021-06-05 21:14:12,009 INFO L78 Accepts]: Start accepts. Automaton has 6327 states and 23194 transitions. Word has length 25 [2021-06-05 21:14:12,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:12,009 INFO L482 AbstractCegarLoop]: Abstraction has 6327 states and 23194 transitions. [2021-06-05 21:14:12,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:12,009 INFO L276 IsEmpty]: Start isEmpty. Operand 6327 states and 23194 transitions. [2021-06-05 21:14:12,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:12,017 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:12,017 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:12,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:12,218 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:12,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:12,218 INFO L82 PathProgramCache]: Analyzing trace with hash -987660262, now seen corresponding path program 30 times [2021-06-05 21:14:12,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:12,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986651197] [2021-06-05 21:14:12,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:12,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:12,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:12,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986651197] [2021-06-05 21:14:12,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986651197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:12,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922750157] [2021-06-05 21:14:12,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:14:12,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:14:12,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:12,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:12,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:12,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922750157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:12,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:12,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:12,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112855892] [2021-06-05 21:14:12,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:12,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:12,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:12,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:12,382 INFO L87 Difference]: Start difference. First operand 6327 states and 23194 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:13,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:13,653 INFO L93 Difference]: Finished difference Result 10442 states and 35260 transitions. [2021-06-05 21:14:13,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 21:14:13,653 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:13,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:13,671 INFO L225 Difference]: With dead ends: 10442 [2021-06-05 21:14:13,671 INFO L226 Difference]: Without dead ends: 10430 [2021-06-05 21:14:13,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 904.5ms TimeCoverageRelationStatistics Valid=1285, Invalid=3545, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 21:14:13,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10430 states. [2021-06-05 21:14:13,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10430 to 6390. [2021-06-05 21:14:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6390 states, 6389 states have (on average 3.6572233526373457) internal successors, (23366), 6389 states have internal predecessors, (23366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6390 states to 6390 states and 23366 transitions. [2021-06-05 21:14:13,802 INFO L78 Accepts]: Start accepts. Automaton has 6390 states and 23366 transitions. Word has length 25 [2021-06-05 21:14:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:13,803 INFO L482 AbstractCegarLoop]: Abstraction has 6390 states and 23366 transitions. [2021-06-05 21:14:13,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:13,803 INFO L276 IsEmpty]: Start isEmpty. Operand 6390 states and 23366 transitions. [2021-06-05 21:14:13,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:13,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:13,811 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:14,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:14,011 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:14,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:14,012 INFO L82 PathProgramCache]: Analyzing trace with hash -347367198, now seen corresponding path program 31 times [2021-06-05 21:14:14,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:14,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536351632] [2021-06-05 21:14:14,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:14,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:14,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536351632] [2021-06-05 21:14:14,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536351632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:14,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368720346] [2021-06-05 21:14:14,040 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 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 21:14:14,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:14,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:14:14,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:14,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368720346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:14,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:14,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 21:14:14,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349009849] [2021-06-05 21:14:14,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:14:14,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:14,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:14:14,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:14:14,110 INFO L87 Difference]: Start difference. First operand 6390 states and 23366 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 21:14:14,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:14,260 INFO L93 Difference]: Finished difference Result 8474 states and 29418 transitions. [2021-06-05 21:14:14,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:14:14,261 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 25 [2021-06-05 21:14:14,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:14,273 INFO L225 Difference]: With dead ends: 8474 [2021-06-05 21:14:14,273 INFO L226 Difference]: Without dead ends: 8466 [2021-06-05 21:14:14,273 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:14:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8466 states. [2021-06-05 21:14:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8466 to 6063. [2021-06-05 21:14:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6063 states, 6062 states have (on average 3.6413724843286044) internal successors, (22074), 6062 states have internal predecessors, (22074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:14,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6063 states to 6063 states and 22074 transitions. [2021-06-05 21:14:14,366 INFO L78 Accepts]: Start accepts. Automaton has 6063 states and 22074 transitions. Word has length 25 [2021-06-05 21:14:14,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:14,366 INFO L482 AbstractCegarLoop]: Abstraction has 6063 states and 22074 transitions. [2021-06-05 21:14:14,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 21:14:14,366 INFO L276 IsEmpty]: Start isEmpty. Operand 6063 states and 22074 transitions. [2021-06-05 21:14:14,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:14,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:14,374 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:14,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 21:14:14,574 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:14,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:14,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1536438246, now seen corresponding path program 32 times [2021-06-05 21:14:14,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:14,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674059552] [2021-06-05 21:14:14,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:14,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:14,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:14,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674059552] [2021-06-05 21:14:14,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674059552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:14,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685997765] [2021-06-05 21:14:14,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:14,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:14,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:14,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:14,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:14,719 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:14,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685997765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:14,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:14,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:14,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115568881] [2021-06-05 21:14:14,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:14,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:14,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:14,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:14,720 INFO L87 Difference]: Start difference. First operand 6063 states and 22074 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:15,661 INFO L93 Difference]: Finished difference Result 9404 states and 31613 transitions. [2021-06-05 21:14:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 21:14:15,662 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:14:15,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:15,675 INFO L225 Difference]: With dead ends: 9404 [2021-06-05 21:14:15,675 INFO L226 Difference]: Without dead ends: 9383 [2021-06-05 21:14:15,676 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 636.0ms TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 21:14:15,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9383 states. [2021-06-05 21:14:15,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9383 to 6156. [2021-06-05 21:14:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6156 states, 6155 states have (on average 3.6417546709991875) internal successors, (22415), 6155 states have internal predecessors, (22415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:15,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6156 states to 6156 states and 22415 transitions. [2021-06-05 21:14:15,787 INFO L78 Accepts]: Start accepts. Automaton has 6156 states and 22415 transitions. Word has length 25 [2021-06-05 21:14:15,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:15,787 INFO L482 AbstractCegarLoop]: Abstraction has 6156 states and 22415 transitions. [2021-06-05 21:14:15,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:15,787 INFO L276 IsEmpty]: Start isEmpty. Operand 6156 states and 22415 transitions. [2021-06-05 21:14:15,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:15,795 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:15,795 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:15,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:15,996 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:15,996 INFO L82 PathProgramCache]: Analyzing trace with hash -431843554, now seen corresponding path program 33 times [2021-06-05 21:14:15,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:15,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602445221] [2021-06-05 21:14:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:16,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:16,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602445221] [2021-06-05 21:14:16,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602445221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:16,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482701642] [2021-06-05 21:14:16,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:16,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:14:16,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:16,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:16,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:16,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482701642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:16,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:16,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:16,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482444449] [2021-06-05 21:14:16,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:16,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:16,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:16,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:16,160 INFO L87 Difference]: Start difference. First operand 6156 states and 22415 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 21:14:17,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:17,485 INFO L93 Difference]: Finished difference Result 10034 states and 33238 transitions. [2021-06-05 21:14:17,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 21:14:17,486 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 25 [2021-06-05 21:14:17,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:17,499 INFO L225 Difference]: With dead ends: 10034 [2021-06-05 21:14:17,500 INFO L226 Difference]: Without dead ends: 10022 [2021-06-05 21:14:17,500 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 946.4ms TimeCoverageRelationStatistics Valid=1341, Invalid=3915, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 21:14:17,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10022 states. [2021-06-05 21:14:17,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10022 to 5985. [2021-06-05 21:14:17,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5985 states, 5984 states have (on average 3.633522727272727) internal successors, (21743), 5984 states have internal predecessors, (21743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:17,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5985 states to 5985 states and 21743 transitions. [2021-06-05 21:14:17,608 INFO L78 Accepts]: Start accepts. Automaton has 5985 states and 21743 transitions. Word has length 25 [2021-06-05 21:14:17,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:17,608 INFO L482 AbstractCegarLoop]: Abstraction has 5985 states and 21743 transitions. [2021-06-05 21:14:17,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 21:14:17,608 INFO L276 IsEmpty]: Start isEmpty. Operand 5985 states and 21743 transitions. [2021-06-05 21:14:17,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:17,615 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:17,615 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:17,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 21:14:17,816 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:17,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:17,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1498494430, now seen corresponding path program 34 times [2021-06-05 21:14:17,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:17,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885204162] [2021-06-05 21:14:17,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:17,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:17,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885204162] [2021-06-05 21:14:17,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885204162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:17,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038062343] [2021-06-05 21:14:17,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:14:17,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:17,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:17,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:17,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:17,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038062343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:17,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:17,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:17,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287093779] [2021-06-05 21:14:17,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:17,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:17,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:17,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:17,970 INFO L87 Difference]: Start difference. First operand 5985 states and 21743 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:18,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:18,773 INFO L93 Difference]: Finished difference Result 10351 states and 35239 transitions. [2021-06-05 21:14:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 21:14:18,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:14:18,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:18,787 INFO L225 Difference]: With dead ends: 10351 [2021-06-05 21:14:18,788 INFO L226 Difference]: Without dead ends: 10288 [2021-06-05 21:14:18,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 563.8ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:14:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10288 states. [2021-06-05 21:14:18,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10288 to 6607. [2021-06-05 21:14:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6607 states, 6606 states have (on average 3.6678776869512566) internal successors, (24230), 6606 states have internal predecessors, (24230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:18,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6607 states to 6607 states and 24230 transitions. [2021-06-05 21:14:18,905 INFO L78 Accepts]: Start accepts. Automaton has 6607 states and 24230 transitions. Word has length 25 [2021-06-05 21:14:18,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:18,905 INFO L482 AbstractCegarLoop]: Abstraction has 6607 states and 24230 transitions. [2021-06-05 21:14:18,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:18,905 INFO L276 IsEmpty]: Start isEmpty. Operand 6607 states and 24230 transitions. [2021-06-05 21:14:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:18,914 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:18,914 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:19,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 21:14:19,114 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:19,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:19,114 INFO L82 PathProgramCache]: Analyzing trace with hash -964604898, now seen corresponding path program 35 times [2021-06-05 21:14:19,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:19,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973151103] [2021-06-05 21:14:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:19,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:19,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973151103] [2021-06-05 21:14:19,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973151103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:19,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79614713] [2021-06-05 21:14:19,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:14:19,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:14:19,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:19,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:19,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:19,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79614713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:19,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:19,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:19,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440612653] [2021-06-05 21:14:19,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:19,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:19,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:19,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:19,292 INFO L87 Difference]: Start difference. First operand 6607 states and 24230 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:20,309 INFO L93 Difference]: Finished difference Result 11074 states and 37311 transitions. [2021-06-05 21:14:20,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 21:14:20,309 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:14:20,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:20,325 INFO L225 Difference]: With dead ends: 11074 [2021-06-05 21:14:20,326 INFO L226 Difference]: Without dead ends: 11032 [2021-06-05 21:14:20,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 741.3ms TimeCoverageRelationStatistics Valid=900, Invalid=2522, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 21:14:20,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11032 states. [2021-06-05 21:14:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11032 to 7171. [2021-06-05 21:14:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7171 states, 7170 states have (on average 3.6553695955369596) internal successors, (26209), 7170 states have internal predecessors, (26209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7171 states to 7171 states and 26209 transitions. [2021-06-05 21:14:20,514 INFO L78 Accepts]: Start accepts. Automaton has 7171 states and 26209 transitions. Word has length 25 [2021-06-05 21:14:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:20,514 INFO L482 AbstractCegarLoop]: Abstraction has 7171 states and 26209 transitions. [2021-06-05 21:14:20,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:20,514 INFO L276 IsEmpty]: Start isEmpty. Operand 7171 states and 26209 transitions. [2021-06-05 21:14:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:20,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:20,524 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:20,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 21:14:20,725 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:20,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:20,725 INFO L82 PathProgramCache]: Analyzing trace with hash 139989794, now seen corresponding path program 36 times [2021-06-05 21:14:20,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:20,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780367946] [2021-06-05 21:14:20,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:20,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:20,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780367946] [2021-06-05 21:14:20,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780367946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:20,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677983620] [2021-06-05 21:14:20,754 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:14:20,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:14:20,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:20,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:20,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:20,889 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:20,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677983620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:20,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:20,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:20,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980347910] [2021-06-05 21:14:20,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:20,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:20,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:20,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:20,890 INFO L87 Difference]: Start difference. First operand 7171 states and 26209 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 21:14:22,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:22,173 INFO L93 Difference]: Finished difference Result 11413 states and 38133 transitions. [2021-06-05 21:14:22,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 21:14:22,173 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 25 [2021-06-05 21:14:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:22,190 INFO L225 Difference]: With dead ends: 11413 [2021-06-05 21:14:22,190 INFO L226 Difference]: Without dead ends: 11401 [2021-06-05 21:14:22,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 940.7ms TimeCoverageRelationStatistics Valid=1345, Invalid=3767, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 21:14:22,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11401 states. [2021-06-05 21:14:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11401 to 6870. [2021-06-05 21:14:22,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6870 states, 6869 states have (on average 3.6622506915125927) internal successors, (25156), 6869 states have internal predecessors, (25156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:22,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6870 states to 6870 states and 25156 transitions. [2021-06-05 21:14:22,324 INFO L78 Accepts]: Start accepts. Automaton has 6870 states and 25156 transitions. Word has length 25 [2021-06-05 21:14:22,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:22,324 INFO L482 AbstractCegarLoop]: Abstraction has 6870 states and 25156 transitions. [2021-06-05 21:14:22,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 21:14:22,324 INFO L276 IsEmpty]: Start isEmpty. Operand 6870 states and 25156 transitions. [2021-06-05 21:14:22,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:22,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:22,333 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:22,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:22,533 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:22,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:22,533 INFO L82 PathProgramCache]: Analyzing trace with hash -198895582, now seen corresponding path program 37 times [2021-06-05 21:14:22,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:22,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942294751] [2021-06-05 21:14:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:22,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:22,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942294751] [2021-06-05 21:14:22,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942294751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:22,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742081236] [2021-06-05 21:14:22,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:14:22,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:22,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:22,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:22,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742081236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:22,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:22,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:22,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121973233] [2021-06-05 21:14:22,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:22,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:22,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:22,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:22,755 INFO L87 Difference]: Start difference. First operand 6870 states and 25156 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:23,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:23,471 INFO L93 Difference]: Finished difference Result 10327 states and 35183 transitions. [2021-06-05 21:14:23,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 21:14:23,472 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:23,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:23,486 INFO L225 Difference]: With dead ends: 10327 [2021-06-05 21:14:23,486 INFO L226 Difference]: Without dead ends: 10249 [2021-06-05 21:14:23,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 599.0ms TimeCoverageRelationStatistics Valid=645, Invalid=1905, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:14:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10249 states. [2021-06-05 21:14:23,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10249 to 7154. [2021-06-05 21:14:23,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7154 states, 7153 states have (on average 3.6648958478959877) internal successors, (26215), 7153 states have internal predecessors, (26215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:23,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7154 states to 7154 states and 26215 transitions. [2021-06-05 21:14:23,622 INFO L78 Accepts]: Start accepts. Automaton has 7154 states and 26215 transitions. Word has length 25 [2021-06-05 21:14:23,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:23,622 INFO L482 AbstractCegarLoop]: Abstraction has 7154 states and 26215 transitions. [2021-06-05 21:14:23,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 7154 states and 26215 transitions. [2021-06-05 21:14:23,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:23,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:23,632 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:23,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:23,845 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:23,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:23,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1767836446, now seen corresponding path program 38 times [2021-06-05 21:14:23,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:23,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220733727] [2021-06-05 21:14:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:23,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:23,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220733727] [2021-06-05 21:14:23,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220733727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:23,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909808026] [2021-06-05 21:14:23,878 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:14:23,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:23,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:23,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:23,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:24,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909808026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:24,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:24,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:24,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067656982] [2021-06-05 21:14:24,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:24,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:24,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:24,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:24,012 INFO L87 Difference]: Start difference. First operand 7154 states and 26215 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:25,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:25,032 INFO L93 Difference]: Finished difference Result 10534 states and 35817 transitions. [2021-06-05 21:14:25,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 21:14:25,033 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:25,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:25,047 INFO L225 Difference]: With dead ends: 10534 [2021-06-05 21:14:25,048 INFO L226 Difference]: Without dead ends: 10429 [2021-06-05 21:14:25,048 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 743.6ms TimeCoverageRelationStatistics Valid=946, Invalid=2836, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 21:14:25,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10429 states. [2021-06-05 21:14:25,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10429 to 7613. [2021-06-05 21:14:25,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7613 states, 7612 states have (on average 3.6342616920651603) internal successors, (27664), 7612 states have internal predecessors, (27664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7613 states to 7613 states and 27664 transitions. [2021-06-05 21:14:25,191 INFO L78 Accepts]: Start accepts. Automaton has 7613 states and 27664 transitions. Word has length 25 [2021-06-05 21:14:25,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:25,191 INFO L482 AbstractCegarLoop]: Abstraction has 7613 states and 27664 transitions. [2021-06-05 21:14:25,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 7613 states and 27664 transitions. [2021-06-05 21:14:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:25,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:25,201 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:25,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:25,401 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:25,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:25,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1334664418, now seen corresponding path program 39 times [2021-06-05 21:14:25,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:25,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785321569] [2021-06-05 21:14:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:25,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:25,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785321569] [2021-06-05 21:14:25,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785321569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:25,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432594080] [2021-06-05 21:14:25,434 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 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 21:14:25,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:14:25,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:25,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:25,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:25,560 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:25,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432594080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:25,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:25,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:25,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951041359] [2021-06-05 21:14:25,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:25,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:25,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:25,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:25,561 INFO L87 Difference]: Start difference. First operand 7613 states and 27664 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:26,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:26,778 INFO L93 Difference]: Finished difference Result 11692 states and 39223 transitions. [2021-06-05 21:14:26,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 21:14:26,779 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:26,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:26,796 INFO L225 Difference]: With dead ends: 11692 [2021-06-05 21:14:26,797 INFO L226 Difference]: Without dead ends: 11650 [2021-06-05 21:14:26,797 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 923.7ms TimeCoverageRelationStatistics Valid=1316, Invalid=3654, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 21:14:26,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11650 states. [2021-06-05 21:14:26,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11650 to 8222. [2021-06-05 21:14:26,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8222 states, 8221 states have (on average 3.6144021408587763) internal successors, (29714), 8221 states have internal predecessors, (29714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8222 states to 8222 states and 29714 transitions. [2021-06-05 21:14:26,967 INFO L78 Accepts]: Start accepts. Automaton has 8222 states and 29714 transitions. Word has length 25 [2021-06-05 21:14:26,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:26,967 INFO L482 AbstractCegarLoop]: Abstraction has 8222 states and 29714 transitions. [2021-06-05 21:14:26,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:26,967 INFO L276 IsEmpty]: Start isEmpty. Operand 8222 states and 29714 transitions. [2021-06-05 21:14:26,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:26,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:26,977 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:27,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:27,178 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:27,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:27,178 INFO L82 PathProgramCache]: Analyzing trace with hash -230069726, now seen corresponding path program 40 times [2021-06-05 21:14:27,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:27,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007451921] [2021-06-05 21:14:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:27,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:27,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007451921] [2021-06-05 21:14:27,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007451921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:27,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878112941] [2021-06-05 21:14:27,212 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:14:27,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:27,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:27,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:27,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:27,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878112941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:27,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:27,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:27,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917096565] [2021-06-05 21:14:27,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:27,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:27,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:27,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:27,376 INFO L87 Difference]: Start difference. First operand 8222 states and 29714 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:14:28,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:28,892 INFO L93 Difference]: Finished difference Result 11897 states and 39696 transitions. [2021-06-05 21:14:28,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 21:14:28,892 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-06-05 21:14:28,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:28,910 INFO L225 Difference]: With dead ends: 11897 [2021-06-05 21:14:28,910 INFO L226 Difference]: Without dead ends: 11897 [2021-06-05 21:14:28,910 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 1204.1ms TimeCoverageRelationStatistics Valid=2040, Invalid=5442, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 21:14:28,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11897 states. [2021-06-05 21:14:29,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11897 to 7931. [2021-06-05 21:14:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7931 states, 7930 states have (on average 3.626860025220681) internal successors, (28761), 7930 states have internal predecessors, (28761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:29,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7931 states to 7931 states and 28761 transitions. [2021-06-05 21:14:29,118 INFO L78 Accepts]: Start accepts. Automaton has 7931 states and 28761 transitions. Word has length 25 [2021-06-05 21:14:29,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:29,118 INFO L482 AbstractCegarLoop]: Abstraction has 7931 states and 28761 transitions. [2021-06-05 21:14:29,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:14:29,118 INFO L276 IsEmpty]: Start isEmpty. Operand 7931 states and 28761 transitions. [2021-06-05 21:14:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:29,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:29,129 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:29,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 21:14:29,329 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:29,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1748642604, now seen corresponding path program 41 times [2021-06-05 21:14:29,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:29,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524505181] [2021-06-05 21:14:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:29,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:29,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524505181] [2021-06-05 21:14:29,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524505181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:29,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054159257] [2021-06-05 21:14:29,356 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 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 21:14:29,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:14:29,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:29,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:29,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054159257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:29,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:29,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:29,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434521202] [2021-06-05 21:14:29,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:29,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:29,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:29,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:29,503 INFO L87 Difference]: Start difference. First operand 7931 states and 28761 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:31,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:31,130 INFO L93 Difference]: Finished difference Result 11453 states and 39005 transitions. [2021-06-05 21:14:31,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-06-05 21:14:31,131 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:31,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:31,148 INFO L225 Difference]: With dead ends: 11453 [2021-06-05 21:14:31,148 INFO L226 Difference]: Without dead ends: 11453 [2021-06-05 21:14:31,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 1257.0ms TimeCoverageRelationStatistics Valid=1834, Invalid=6176, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 21:14:31,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11453 states. [2021-06-05 21:14:31,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11453 to 8073. [2021-06-05 21:14:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8073 states, 8072 states have (on average 3.632185332011893) internal successors, (29319), 8072 states have internal predecessors, (29319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8073 states to 8073 states and 29319 transitions. [2021-06-05 21:14:31,295 INFO L78 Accepts]: Start accepts. Automaton has 8073 states and 29319 transitions. Word has length 25 [2021-06-05 21:14:31,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:31,296 INFO L482 AbstractCegarLoop]: Abstraction has 8073 states and 29319 transitions. [2021-06-05 21:14:31,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:31,296 INFO L276 IsEmpty]: Start isEmpty. Operand 8073 states and 29319 transitions. [2021-06-05 21:14:31,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:31,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:31,306 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:31,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:31,507 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:31,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1875518252, now seen corresponding path program 42 times [2021-06-05 21:14:31,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:31,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484160534] [2021-06-05 21:14:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:31,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:31,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484160534] [2021-06-05 21:14:31,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484160534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:31,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806703254] [2021-06-05 21:14:31,533 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 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 21:14:31,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:14:31,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:31,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:31,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:31,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806703254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:31,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:31,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:31,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748582153] [2021-06-05 21:14:31,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:31,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:31,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:31,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:31,700 INFO L87 Difference]: Start difference. First operand 8073 states and 29319 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:32,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:32,734 INFO L93 Difference]: Finished difference Result 10292 states and 35448 transitions. [2021-06-05 21:14:32,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 21:14:32,734 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:14:32,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:32,749 INFO L225 Difference]: With dead ends: 10292 [2021-06-05 21:14:32,750 INFO L226 Difference]: Without dead ends: 10278 [2021-06-05 21:14:32,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 761.3ms TimeCoverageRelationStatistics Valid=885, Invalid=2655, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 21:14:32,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10278 states. [2021-06-05 21:14:32,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10278 to 8045. [2021-06-05 21:14:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8045 states, 8044 states have (on average 3.6301591248135257) internal successors, (29201), 8044 states have internal predecessors, (29201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8045 states to 8045 states and 29201 transitions. [2021-06-05 21:14:32,893 INFO L78 Accepts]: Start accepts. Automaton has 8045 states and 29201 transitions. Word has length 25 [2021-06-05 21:14:32,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:32,893 INFO L482 AbstractCegarLoop]: Abstraction has 8045 states and 29201 transitions. [2021-06-05 21:14:32,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:32,894 INFO L276 IsEmpty]: Start isEmpty. Operand 8045 states and 29201 transitions. [2021-06-05 21:14:32,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:32,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:32,904 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:33,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:33,105 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:33,105 INFO L82 PathProgramCache]: Analyzing trace with hash 583174616, now seen corresponding path program 43 times [2021-06-05 21:14:33,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:33,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530212370] [2021-06-05 21:14:33,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:33,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:33,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530212370] [2021-06-05 21:14:33,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530212370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:33,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944965914] [2021-06-05 21:14:33,135 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 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 21:14:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:33,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:33,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:33,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944965914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:33,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:33,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:33,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075367634] [2021-06-05 21:14:33,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:33,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:33,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:33,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:33,258 INFO L87 Difference]: Start difference. First operand 8045 states and 29201 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:34,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:34,083 INFO L93 Difference]: Finished difference Result 10084 states and 34890 transitions. [2021-06-05 21:14:34,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 21:14:34,084 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:14:34,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:34,099 INFO L225 Difference]: With dead ends: 10084 [2021-06-05 21:14:34,099 INFO L226 Difference]: Without dead ends: 10042 [2021-06-05 21:14:34,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 587.9ms TimeCoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 21:14:34,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10042 states. [2021-06-05 21:14:34,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10042 to 8045. [2021-06-05 21:14:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8045 states, 8044 states have (on average 3.6227001491795128) internal successors, (29141), 8044 states have internal predecessors, (29141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8045 states to 8045 states and 29141 transitions. [2021-06-05 21:14:34,256 INFO L78 Accepts]: Start accepts. Automaton has 8045 states and 29141 transitions. Word has length 25 [2021-06-05 21:14:34,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:34,256 INFO L482 AbstractCegarLoop]: Abstraction has 8045 states and 29141 transitions. [2021-06-05 21:14:34,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 8045 states and 29141 transitions. [2021-06-05 21:14:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:34,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:34,266 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:34,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 21:14:34,466 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:34,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:34,467 INFO L82 PathProgramCache]: Analyzing trace with hash -973619432, now seen corresponding path program 44 times [2021-06-05 21:14:34,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:34,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487928460] [2021-06-05 21:14:34,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:34,488 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:34,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:34,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487928460] [2021-06-05 21:14:34,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487928460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:34,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842426423] [2021-06-05 21:14:34,488 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 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 21:14:34,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:34,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:34,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:14:34,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:34,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842426423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:34,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:34,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:14:34,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794812324] [2021-06-05 21:14:34,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:14:34,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:34,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:14:34,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:14:34,575 INFO L87 Difference]: Start difference. First operand 8045 states and 29141 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:34,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:34,823 INFO L93 Difference]: Finished difference Result 18209 states and 62511 transitions. [2021-06-05 21:14:34,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:14:34,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:34,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:34,854 INFO L225 Difference]: With dead ends: 18209 [2021-06-05 21:14:34,854 INFO L226 Difference]: Without dead ends: 18202 [2021-06-05 21:14:34,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:14:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18202 states. [2021-06-05 21:14:35,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18202 to 10877. [2021-06-05 21:14:35,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10877 states, 10876 states have (on average 3.713313718278779) internal successors, (40386), 10876 states have internal predecessors, (40386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10877 states to 10877 states and 40386 transitions. [2021-06-05 21:14:35,079 INFO L78 Accepts]: Start accepts. Automaton has 10877 states and 40386 transitions. Word has length 25 [2021-06-05 21:14:35,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:35,079 INFO L482 AbstractCegarLoop]: Abstraction has 10877 states and 40386 transitions. [2021-06-05 21:14:35,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:35,080 INFO L276 IsEmpty]: Start isEmpty. Operand 10877 states and 40386 transitions. [2021-06-05 21:14:35,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:35,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:35,094 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:35,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:35,294 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:35,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:35,294 INFO L82 PathProgramCache]: Analyzing trace with hash -487815328, now seen corresponding path program 45 times [2021-06-05 21:14:35,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:35,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121726955] [2021-06-05 21:14:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:35,316 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:35,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:35,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121726955] [2021-06-05 21:14:35,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121726955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:35,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814690991] [2021-06-05 21:14:35,316 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 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 21:14:35,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:14:35,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:35,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:14:35,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:35,390 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:14:35,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814690991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:35,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:35,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 21:14:35,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486978111] [2021-06-05 21:14:35,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:14:35,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:35,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:14:35,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:14:35,391 INFO L87 Difference]: Start difference. First operand 10877 states and 40386 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 21:14:35,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:35,587 INFO L93 Difference]: Finished difference Result 15076 states and 52663 transitions. [2021-06-05 21:14:35,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:14:35,587 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 25 [2021-06-05 21:14:35,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:35,612 INFO L225 Difference]: With dead ends: 15076 [2021-06-05 21:14:35,613 INFO L226 Difference]: Without dead ends: 15062 [2021-06-05 21:14:35,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:14:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15062 states. [2021-06-05 21:14:35,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15062 to 10165. [2021-06-05 21:14:35,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10165 states, 10164 states have (on average 3.6990358126721765) internal successors, (37597), 10164 states have internal predecessors, (37597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10165 states to 10165 states and 37597 transitions. [2021-06-05 21:14:35,808 INFO L78 Accepts]: Start accepts. Automaton has 10165 states and 37597 transitions. Word has length 25 [2021-06-05 21:14:35,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:35,808 INFO L482 AbstractCegarLoop]: Abstraction has 10165 states and 37597 transitions. [2021-06-05 21:14:35,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 21:14:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 10165 states and 37597 transitions. [2021-06-05 21:14:35,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:35,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:35,822 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:36,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 21:14:36,023 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:36,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:36,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1124282182, now seen corresponding path program 46 times [2021-06-05 21:14:36,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:36,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613668255] [2021-06-05 21:14:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:36,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:36,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:36,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613668255] [2021-06-05 21:14:36,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613668255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:36,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348071025] [2021-06-05 21:14:36,109 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 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 21:14:36,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:36,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:36,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:14:36,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:36,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348071025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:36,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:36,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 21:14:36,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154116070] [2021-06-05 21:14:36,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:14:36,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:36,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:14:36,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:14:36,179 INFO L87 Difference]: Start difference. First operand 10165 states and 37597 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:36,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:36,412 INFO L93 Difference]: Finished difference Result 14216 states and 49460 transitions. [2021-06-05 21:14:36,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:14:36,412 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:36,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:36,437 INFO L225 Difference]: With dead ends: 14216 [2021-06-05 21:14:36,437 INFO L226 Difference]: Without dead ends: 14194 [2021-06-05 21:14:36,437 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:14:36,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14194 states. [2021-06-05 21:14:36,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14194 to 8955. [2021-06-05 21:14:36,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8955 states, 8954 states have (on average 3.668528032164396) internal successors, (32848), 8954 states have internal predecessors, (32848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:36,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8955 states to 8955 states and 32848 transitions. [2021-06-05 21:14:36,607 INFO L78 Accepts]: Start accepts. Automaton has 8955 states and 32848 transitions. Word has length 25 [2021-06-05 21:14:36,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:36,607 INFO L482 AbstractCegarLoop]: Abstraction has 8955 states and 32848 transitions. [2021-06-05 21:14:36,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:36,608 INFO L276 IsEmpty]: Start isEmpty. Operand 8955 states and 32848 transitions. [2021-06-05 21:14:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:36,619 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:36,619 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:36,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:36,819 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:36,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:36,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1910600748, now seen corresponding path program 22 times [2021-06-05 21:14:36,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:36,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597248244] [2021-06-05 21:14:36,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:36,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:36,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597248244] [2021-06-05 21:14:36,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597248244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:36,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415888339] [2021-06-05 21:14:36,853 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 21:14:36,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:36,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:36,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:36,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:36,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415888339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:36,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:36,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:36,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366143157] [2021-06-05 21:14:36,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:36,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:36,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:36,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:36,985 INFO L87 Difference]: Start difference. First operand 8955 states and 32848 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:37,766 INFO L93 Difference]: Finished difference Result 9639 states and 34552 transitions. [2021-06-05 21:14:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 21:14:37,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:37,781 INFO L225 Difference]: With dead ends: 9639 [2021-06-05 21:14:37,781 INFO L226 Difference]: Without dead ends: 9635 [2021-06-05 21:14:37,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 616.6ms TimeCoverageRelationStatistics Valid=486, Invalid=1964, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:14:37,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9635 states. [2021-06-05 21:14:37,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9635 to 9003. [2021-06-05 21:14:37,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9003 states, 9002 states have (on average 3.6654076871806267) internal successors, (32996), 9002 states have internal predecessors, (32996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:37,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9003 states to 9003 states and 32996 transitions. [2021-06-05 21:14:37,907 INFO L78 Accepts]: Start accepts. Automaton has 9003 states and 32996 transitions. Word has length 25 [2021-06-05 21:14:37,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:37,907 INFO L482 AbstractCegarLoop]: Abstraction has 9003 states and 32996 transitions. [2021-06-05 21:14:37,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:37,908 INFO L276 IsEmpty]: Start isEmpty. Operand 9003 states and 32996 transitions. [2021-06-05 21:14:37,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:37,919 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:37,920 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:38,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-06-05 21:14:38,120 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:38,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:38,120 INFO L82 PathProgramCache]: Analyzing trace with hash 25489256, now seen corresponding path program 23 times [2021-06-05 21:14:38,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:38,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247283392] [2021-06-05 21:14:38,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:38,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:38,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247283392] [2021-06-05 21:14:38,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247283392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:38,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500777536] [2021-06-05 21:14:38,155 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 21:14:38,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:14:38,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:38,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:14:38,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:38,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500777536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:38,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:38,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:14:38,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311452815] [2021-06-05 21:14:38,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:38,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:38,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:38,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:38,266 INFO L87 Difference]: Start difference. First operand 9003 states and 32996 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:38,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:38,906 INFO L93 Difference]: Finished difference Result 21111 states and 74093 transitions. [2021-06-05 21:14:38,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:14:38,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:14:38,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:38,945 INFO L225 Difference]: With dead ends: 21111 [2021-06-05 21:14:38,945 INFO L226 Difference]: Without dead ends: 21095 [2021-06-05 21:14:38,945 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 412.6ms TimeCoverageRelationStatistics Valid=392, Invalid=1168, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:14:38,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21095 states. [2021-06-05 21:14:39,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21095 to 10207. [2021-06-05 21:14:39,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.700862237899275) internal successors, (37771), 10206 states have internal predecessors, (37771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 37771 transitions. [2021-06-05 21:14:39,204 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 37771 transitions. Word has length 25 [2021-06-05 21:14:39,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:39,204 INFO L482 AbstractCegarLoop]: Abstraction has 10207 states and 37771 transitions. [2021-06-05 21:14:39,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:39,205 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 37771 transitions. [2021-06-05 21:14:39,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:39,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:39,218 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:39,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:39,418 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:39,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:39,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1925748840, now seen corresponding path program 24 times [2021-06-05 21:14:39,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:39,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780171360] [2021-06-05 21:14:39,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:39,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:39,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780171360] [2021-06-05 21:14:39,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780171360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:39,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503511446] [2021-06-05 21:14:39,457 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 21:14:39,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:14:39,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:39,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:14:39,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:39,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503511446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:39,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:39,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:14:39,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729761220] [2021-06-05 21:14:39,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:14:39,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:39,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:14:39,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:14:39,568 INFO L87 Difference]: Start difference. First operand 10207 states and 37771 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:40,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:40,209 INFO L93 Difference]: Finished difference Result 25646 states and 89918 transitions. [2021-06-05 21:14:40,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:14:40,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:40,260 INFO L225 Difference]: With dead ends: 25646 [2021-06-05 21:14:40,260 INFO L226 Difference]: Without dead ends: 25618 [2021-06-05 21:14:40,260 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 407.8ms TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:14:40,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25618 states. [2021-06-05 21:14:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25618 to 12139. [2021-06-05 21:14:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12139 states, 12138 states have (on average 3.709342560553633) internal successors, (45024), 12138 states have internal predecessors, (45024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12139 states to 12139 states and 45024 transitions. [2021-06-05 21:14:40,543 INFO L78 Accepts]: Start accepts. Automaton has 12139 states and 45024 transitions. Word has length 25 [2021-06-05 21:14:40,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:40,543 INFO L482 AbstractCegarLoop]: Abstraction has 12139 states and 45024 transitions. [2021-06-05 21:14:40,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:40,544 INFO L276 IsEmpty]: Start isEmpty. Operand 12139 states and 45024 transitions. [2021-06-05 21:14:40,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:40,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:40,559 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:40,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-06-05 21:14:40,760 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:40,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:40,760 INFO L82 PathProgramCache]: Analyzing trace with hash -2062983836, now seen corresponding path program 25 times [2021-06-05 21:14:40,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:40,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103297934] [2021-06-05 21:14:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:40,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:40,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103297934] [2021-06-05 21:14:40,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103297934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:40,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357306484] [2021-06-05 21:14:40,789 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 21:14:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:40,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:40,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:40,927 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:40,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357306484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:40,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:40,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:40,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200654505] [2021-06-05 21:14:40,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:40,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:40,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:40,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:40,928 INFO L87 Difference]: Start difference. First operand 12139 states and 45024 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:41,658 INFO L93 Difference]: Finished difference Result 12705 states and 46419 transitions. [2021-06-05 21:14:41,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:14:41,658 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:14:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:41,679 INFO L225 Difference]: With dead ends: 12705 [2021-06-05 21:14:41,679 INFO L226 Difference]: Without dead ends: 12698 [2021-06-05 21:14:41,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 572.4ms TimeCoverageRelationStatistics Valid=380, Invalid=1600, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:14:41,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12698 states. [2021-06-05 21:14:41,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12698 to 12117. [2021-06-05 21:14:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12117 states, 12116 states have (on average 3.710052822713767) internal successors, (44951), 12116 states have internal predecessors, (44951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:41,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12117 states to 12117 states and 44951 transitions. [2021-06-05 21:14:41,858 INFO L78 Accepts]: Start accepts. Automaton has 12117 states and 44951 transitions. Word has length 25 [2021-06-05 21:14:41,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:41,858 INFO L482 AbstractCegarLoop]: Abstraction has 12117 states and 44951 transitions. [2021-06-05 21:14:41,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:41,858 INFO L276 IsEmpty]: Start isEmpty. Operand 12117 states and 44951 transitions. [2021-06-05 21:14:41,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:41,874 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:41,874 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:42,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:42,075 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:42,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:42,077 INFO L82 PathProgramCache]: Analyzing trace with hash -519372456, now seen corresponding path program 26 times [2021-06-05 21:14:42,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:42,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392929267] [2021-06-05 21:14:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:42,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:42,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392929267] [2021-06-05 21:14:42,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392929267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:42,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449722524] [2021-06-05 21:14:42,112 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 21:14:42,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:42,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:42,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:42,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:42,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449722524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:42,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:42,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:42,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832534584] [2021-06-05 21:14:42,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:42,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:42,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:42,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:42,246 INFO L87 Difference]: Start difference. First operand 12117 states and 44951 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:42,897 INFO L93 Difference]: Finished difference Result 12951 states and 47049 transitions. [2021-06-05 21:14:42,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:14:42,897 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:42,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:42,919 INFO L225 Difference]: With dead ends: 12951 [2021-06-05 21:14:42,920 INFO L226 Difference]: Without dead ends: 12909 [2021-06-05 21:14:42,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 475.9ms TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 21:14:42,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12909 states. [2021-06-05 21:14:43,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12909 to 12231. [2021-06-05 21:14:43,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12231 states, 12230 states have (on average 3.7036794766966477) internal successors, (45296), 12230 states have internal predecessors, (45296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:43,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12231 states to 12231 states and 45296 transitions. [2021-06-05 21:14:43,099 INFO L78 Accepts]: Start accepts. Automaton has 12231 states and 45296 transitions. Word has length 25 [2021-06-05 21:14:43,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:43,099 INFO L482 AbstractCegarLoop]: Abstraction has 12231 states and 45296 transitions. [2021-06-05 21:14:43,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:43,099 INFO L276 IsEmpty]: Start isEmpty. Operand 12231 states and 45296 transitions. [2021-06-05 21:14:43,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:43,115 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:43,115 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:43,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:43,316 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:43,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:43,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1810377428, now seen corresponding path program 27 times [2021-06-05 21:14:43,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:43,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413169877] [2021-06-05 21:14:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:43,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:43,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413169877] [2021-06-05 21:14:43,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413169877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:43,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507951098] [2021-06-05 21:14:43,350 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 21:14:43,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:14:43,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:43,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:14:43,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:43,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507951098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:43,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:43,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:14:43,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197407454] [2021-06-05 21:14:43,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:43,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:43,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:43,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:43,468 INFO L87 Difference]: Start difference. First operand 12231 states and 45296 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 21:14:44,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:44,013 INFO L93 Difference]: Finished difference Result 16039 states and 57612 transitions. [2021-06-05 21:14:44,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:14:44,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 25 [2021-06-05 21:14:44,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:44,041 INFO L225 Difference]: With dead ends: 16039 [2021-06-05 21:14:44,041 INFO L226 Difference]: Without dead ends: 16018 [2021-06-05 21:14:44,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:14:44,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16018 states. [2021-06-05 21:14:44,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16018 to 12188. [2021-06-05 21:14:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12188 states, 12187 states have (on average 3.704767375071798) internal successors, (45150), 12187 states have internal predecessors, (45150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12188 states to 12188 states and 45150 transitions. [2021-06-05 21:14:44,241 INFO L78 Accepts]: Start accepts. Automaton has 12188 states and 45150 transitions. Word has length 25 [2021-06-05 21:14:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:44,241 INFO L482 AbstractCegarLoop]: Abstraction has 12188 states and 45150 transitions. [2021-06-05 21:14:44,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 21:14:44,242 INFO L276 IsEmpty]: Start isEmpty. Operand 12188 states and 45150 transitions. [2021-06-05 21:14:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:44,258 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:44,258 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:44,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:44,458 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:44,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:44,458 INFO L82 PathProgramCache]: Analyzing trace with hash 22577300, now seen corresponding path program 28 times [2021-06-05 21:14:44,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:44,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274855551] [2021-06-05 21:14:44,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:44,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:44,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274855551] [2021-06-05 21:14:44,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274855551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:44,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230674292] [2021-06-05 21:14:44,509 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) [2021-06-05 21:14:44,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:44,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:44,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:44,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:44,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:44,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230674292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:44,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:44,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:44,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289591310] [2021-06-05 21:14:44,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:44,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:44,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:44,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:44,642 INFO L87 Difference]: Start difference. First operand 12188 states and 45150 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:45,077 INFO L93 Difference]: Finished difference Result 12816 states and 46753 transitions. [2021-06-05 21:14:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:14:45,078 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:45,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:45,099 INFO L225 Difference]: With dead ends: 12816 [2021-06-05 21:14:45,100 INFO L226 Difference]: Without dead ends: 12777 [2021-06-05 21:14:45,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 332.1ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:14:45,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12777 states. [2021-06-05 21:14:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12777 to 12192. [2021-06-05 21:14:45,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12192 states, 12191 states have (on average 3.705028299565253) internal successors, (45168), 12191 states have internal predecessors, (45168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12192 states to 12192 states and 45168 transitions. [2021-06-05 21:14:45,287 INFO L78 Accepts]: Start accepts. Automaton has 12192 states and 45168 transitions. Word has length 25 [2021-06-05 21:14:45,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:45,287 INFO L482 AbstractCegarLoop]: Abstraction has 12192 states and 45168 transitions. [2021-06-05 21:14:45,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:45,287 INFO L276 IsEmpty]: Start isEmpty. Operand 12192 states and 45168 transitions. [2021-06-05 21:14:45,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:45,304 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:45,305 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:45,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:45,505 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:45,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:45,505 INFO L82 PathProgramCache]: Analyzing trace with hash -375648860, now seen corresponding path program 29 times [2021-06-05 21:14:45,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:45,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019524831] [2021-06-05 21:14:45,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:45,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:45,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019524831] [2021-06-05 21:14:45,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019524831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:45,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890613085] [2021-06-05 21:14:45,539 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 21:14:45,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:14:45,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:45,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:14:45,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:45,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890613085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:45,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:45,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:14:45,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932427953] [2021-06-05 21:14:45,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:14:45,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:45,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:14:45,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:14:45,656 INFO L87 Difference]: Start difference. First operand 12192 states and 45168 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:46,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:46,049 INFO L93 Difference]: Finished difference Result 15059 states and 54452 transitions. [2021-06-05 21:14:46,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 21:14:46,049 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:46,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:46,075 INFO L225 Difference]: With dead ends: 15059 [2021-06-05 21:14:46,075 INFO L226 Difference]: Without dead ends: 15038 [2021-06-05 21:14:46,076 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 250.3ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:14:46,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15038 states. [2021-06-05 21:14:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15038 to 12223. [2021-06-05 21:14:46,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12223 states, 12222 states have (on average 3.7051219113074785) internal successors, (45284), 12222 states have internal predecessors, (45284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:46,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12223 states to 12223 states and 45284 transitions. [2021-06-05 21:14:46,316 INFO L78 Accepts]: Start accepts. Automaton has 12223 states and 45284 transitions. Word has length 25 [2021-06-05 21:14:46,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:46,316 INFO L482 AbstractCegarLoop]: Abstraction has 12223 states and 45284 transitions. [2021-06-05 21:14:46,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:46,316 INFO L276 IsEmpty]: Start isEmpty. Operand 12223 states and 45284 transitions. [2021-06-05 21:14:46,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:46,333 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:46,333 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:46,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 21:14:46,533 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:46,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:46,534 INFO L82 PathProgramCache]: Analyzing trace with hash -2056092692, now seen corresponding path program 30 times [2021-06-05 21:14:46,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:46,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832742607] [2021-06-05 21:14:46,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:46,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:46,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832742607] [2021-06-05 21:14:46,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832742607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:46,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202400225] [2021-06-05 21:14:46,568 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 21:14:46,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:14:46,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:46,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:14:46,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:46,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202400225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:46,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:46,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:14:46,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99734739] [2021-06-05 21:14:46,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:14:46,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:46,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:14:46,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:14:46,683 INFO L87 Difference]: Start difference. First operand 12223 states and 45284 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:47,709 INFO L93 Difference]: Finished difference Result 19890 states and 68893 transitions. [2021-06-05 21:14:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 21:14:47,709 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:47,745 INFO L225 Difference]: With dead ends: 19890 [2021-06-05 21:14:47,745 INFO L226 Difference]: Without dead ends: 19820 [2021-06-05 21:14:47,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 709.8ms TimeCoverageRelationStatistics Valid=559, Invalid=1991, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:14:47,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19820 states. [2021-06-05 21:14:47,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19820 to 12409. [2021-06-05 21:14:47,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12409 states, 12408 states have (on average 3.700354609929078) internal successors, (45914), 12408 states have internal predecessors, (45914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12409 states to 12409 states and 45914 transitions. [2021-06-05 21:14:47,993 INFO L78 Accepts]: Start accepts. Automaton has 12409 states and 45914 transitions. Word has length 25 [2021-06-05 21:14:47,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:47,993 INFO L482 AbstractCegarLoop]: Abstraction has 12409 states and 45914 transitions. [2021-06-05 21:14:47,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:47,993 INFO L276 IsEmpty]: Start isEmpty. Operand 12409 states and 45914 transitions. [2021-06-05 21:14:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:48,010 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:48,010 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:48,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:48,210 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:48,210 INFO L82 PathProgramCache]: Analyzing trace with hash 839007340, now seen corresponding path program 31 times [2021-06-05 21:14:48,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:48,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962357995] [2021-06-05 21:14:48,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:48,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:48,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962357995] [2021-06-05 21:14:48,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962357995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:48,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975980142] [2021-06-05 21:14:48,254 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 21:14:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:48,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:48,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:48,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:48,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975980142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:48,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:48,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:48,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428901694] [2021-06-05 21:14:48,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:48,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:48,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:48,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:48,379 INFO L87 Difference]: Start difference. First operand 12409 states and 45914 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:49,384 INFO L93 Difference]: Finished difference Result 13776 states and 49426 transitions. [2021-06-05 21:14:49,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 21:14:49,384 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:49,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:49,407 INFO L225 Difference]: With dead ends: 13776 [2021-06-05 21:14:49,407 INFO L226 Difference]: Without dead ends: 13772 [2021-06-05 21:14:49,408 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 728.2ms TimeCoverageRelationStatistics Valid=759, Invalid=2663, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 21:14:49,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13772 states. [2021-06-05 21:14:49,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13772 to 12464. [2021-06-05 21:14:49,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12464 states, 12463 states have (on average 3.698146513680494) internal successors, (46090), 12463 states have internal predecessors, (46090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12464 states to 12464 states and 46090 transitions. [2021-06-05 21:14:49,616 INFO L78 Accepts]: Start accepts. Automaton has 12464 states and 46090 transitions. Word has length 25 [2021-06-05 21:14:49,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:49,616 INFO L482 AbstractCegarLoop]: Abstraction has 12464 states and 46090 transitions. [2021-06-05 21:14:49,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:49,616 INFO L276 IsEmpty]: Start isEmpty. Operand 12464 states and 46090 transitions. [2021-06-05 21:14:49,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:49,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:49,634 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:49,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 21:14:49,834 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:49,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:49,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1160390052, now seen corresponding path program 32 times [2021-06-05 21:14:49,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:49,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826309090] [2021-06-05 21:14:49,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:49,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:49,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:49,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826309090] [2021-06-05 21:14:49,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826309090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:49,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268702715] [2021-06-05 21:14:49,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:14:49,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:49,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:49,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:49,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:49,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268702715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:49,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:49,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:14:49,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622376161] [2021-06-05 21:14:49,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:14:49,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:49,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:14:49,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:14:49,997 INFO L87 Difference]: Start difference. First operand 12464 states and 46090 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:50,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:50,798 INFO L93 Difference]: Finished difference Result 13407 states and 48527 transitions. [2021-06-05 21:14:50,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 21:14:50,798 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:14:50,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:50,821 INFO L225 Difference]: With dead ends: 13407 [2021-06-05 21:14:50,821 INFO L226 Difference]: Without dead ends: 13386 [2021-06-05 21:14:50,821 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 578.1ms TimeCoverageRelationStatistics Valid=545, Invalid=2005, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:14:50,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13386 states. [2021-06-05 21:14:50,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13386 to 12326. [2021-06-05 21:14:50,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12326 states, 12325 states have (on average 3.7058823529411766) internal successors, (45675), 12325 states have internal predecessors, (45675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12326 states to 12326 states and 45675 transitions. [2021-06-05 21:14:51,020 INFO L78 Accepts]: Start accepts. Automaton has 12326 states and 45675 transitions. Word has length 25 [2021-06-05 21:14:51,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:51,020 INFO L482 AbstractCegarLoop]: Abstraction has 12326 states and 45675 transitions. [2021-06-05 21:14:51,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:14:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand 12326 states and 45675 transitions. [2021-06-05 21:14:51,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:51,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:51,037 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:51,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 21:14:51,237 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:51,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:51,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1590965864, now seen corresponding path program 33 times [2021-06-05 21:14:51,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:51,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453311361] [2021-06-05 21:14:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:51,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:51,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453311361] [2021-06-05 21:14:51,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453311361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:51,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548403422] [2021-06-05 21:14:51,269 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 21:14:51,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:14:51,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:51,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:51,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:51,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548403422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:51,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:51,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:51,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359030157] [2021-06-05 21:14:51,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:51,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:51,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:51,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:51,395 INFO L87 Difference]: Start difference. First operand 12326 states and 45675 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:52,187 INFO L93 Difference]: Finished difference Result 13626 states and 49095 transitions. [2021-06-05 21:14:52,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 21:14:52,187 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:52,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:52,210 INFO L225 Difference]: With dead ends: 13626 [2021-06-05 21:14:52,210 INFO L226 Difference]: Without dead ends: 13563 [2021-06-05 21:14:52,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 564.5ms TimeCoverageRelationStatistics Valid=494, Invalid=2158, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 21:14:52,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13563 states. [2021-06-05 21:14:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13563 to 12450. [2021-06-05 21:14:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12450 states, 12449 states have (on average 3.696441481243473) internal successors, (46017), 12449 states have internal predecessors, (46017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12450 states to 12450 states and 46017 transitions. [2021-06-05 21:14:52,413 INFO L78 Accepts]: Start accepts. Automaton has 12450 states and 46017 transitions. Word has length 25 [2021-06-05 21:14:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:52,413 INFO L482 AbstractCegarLoop]: Abstraction has 12450 states and 46017 transitions. [2021-06-05 21:14:52,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 12450 states and 46017 transitions. [2021-06-05 21:14:52,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:52,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:52,431 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:52,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 21:14:52,632 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:52,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:52,632 INFO L82 PathProgramCache]: Analyzing trace with hash -855389204, now seen corresponding path program 34 times [2021-06-05 21:14:52,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:52,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155935151] [2021-06-05 21:14:52,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:52,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:52,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155935151] [2021-06-05 21:14:52,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155935151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:52,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77804769] [2021-06-05 21:14:52,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:14:52,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:14:52,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:52,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:14:52,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:52,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77804769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:52,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:52,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:14:52,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764123376] [2021-06-05 21:14:52,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:14:52,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:52,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:14:52,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:14:52,786 INFO L87 Difference]: Start difference. First operand 12450 states and 46017 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:53,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:53,616 INFO L93 Difference]: Finished difference Result 26665 states and 93712 transitions. [2021-06-05 21:14:53,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:14:53,617 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:53,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:53,668 INFO L225 Difference]: With dead ends: 26665 [2021-06-05 21:14:53,668 INFO L226 Difference]: Without dead ends: 26651 [2021-06-05 21:14:53,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 533.2ms TimeCoverageRelationStatistics Valid=432, Invalid=1290, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:14:53,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26651 states. [2021-06-05 21:14:53,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26651 to 14569. [2021-06-05 21:14:53,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14569 states, 14568 states have (on average 3.7305738605161998) internal successors, (54347), 14568 states have internal predecessors, (54347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14569 states to 14569 states and 54347 transitions. [2021-06-05 21:14:54,004 INFO L78 Accepts]: Start accepts. Automaton has 14569 states and 54347 transitions. Word has length 25 [2021-06-05 21:14:54,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:54,004 INFO L482 AbstractCegarLoop]: Abstraction has 14569 states and 54347 transitions. [2021-06-05 21:14:54,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:54,004 INFO L276 IsEmpty]: Start isEmpty. Operand 14569 states and 54347 transitions. [2021-06-05 21:14:54,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:54,026 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:54,026 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:54,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 21:14:54,226 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:54,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1931977836, now seen corresponding path program 35 times [2021-06-05 21:14:54,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:54,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491383244] [2021-06-05 21:14:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:54,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:54,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491383244] [2021-06-05 21:14:54,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491383244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:54,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514518777] [2021-06-05 21:14:54,257 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 21:14:54,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:14:54,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:54,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:54,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:54,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514518777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:54,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:54,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:54,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981085942] [2021-06-05 21:14:54,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:54,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:54,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:54,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:54,399 INFO L87 Difference]: Start difference. First operand 14569 states and 54347 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:55,376 INFO L93 Difference]: Finished difference Result 16521 states and 59949 transitions. [2021-06-05 21:14:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 21:14:55,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:55,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:55,405 INFO L225 Difference]: With dead ends: 16521 [2021-06-05 21:14:55,405 INFO L226 Difference]: Without dead ends: 16517 [2021-06-05 21:14:55,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 713.4ms TimeCoverageRelationStatistics Valid=747, Invalid=2675, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 21:14:55,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16517 states. [2021-06-05 21:14:55,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16517 to 14783. [2021-06-05 21:14:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14783 states, 14782 states have (on average 3.7296035719117846) internal successors, (55131), 14782 states have internal predecessors, (55131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:55,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14783 states to 14783 states and 55131 transitions. [2021-06-05 21:14:55,661 INFO L78 Accepts]: Start accepts. Automaton has 14783 states and 55131 transitions. Word has length 25 [2021-06-05 21:14:55,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:55,661 INFO L482 AbstractCegarLoop]: Abstraction has 14783 states and 55131 transitions. [2021-06-05 21:14:55,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 14783 states and 55131 transitions. [2021-06-05 21:14:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:55,682 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:55,682 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:55,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:55,883 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:55,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:55,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1914731100, now seen corresponding path program 36 times [2021-06-05 21:14:55,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:55,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32884960] [2021-06-05 21:14:55,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:55,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:55,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32884960] [2021-06-05 21:14:55,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32884960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:55,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572624874] [2021-06-05 21:14:55,917 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 21:14:55,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:14:55,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:55,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:55,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:56,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572624874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:56,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:56,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:56,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601715233] [2021-06-05 21:14:56,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:56,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:56,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:56,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:56,047 INFO L87 Difference]: Start difference. First operand 14783 states and 55131 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:57,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:57,355 INFO L93 Difference]: Finished difference Result 17102 states and 61433 transitions. [2021-06-05 21:14:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 21:14:57,355 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:57,385 INFO L225 Difference]: With dead ends: 17102 [2021-06-05 21:14:57,385 INFO L226 Difference]: Without dead ends: 17098 [2021-06-05 21:14:57,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 943.5ms TimeCoverageRelationStatistics Valid=1184, Invalid=4668, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 21:14:57,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17098 states. [2021-06-05 21:14:57,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17098 to 14919. [2021-06-05 21:14:57,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14919 states, 14918 states have (on average 3.7264378603029895) internal successors, (55591), 14918 states have internal predecessors, (55591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:57,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14919 states to 14919 states and 55591 transitions. [2021-06-05 21:14:57,696 INFO L78 Accepts]: Start accepts. Automaton has 14919 states and 55591 transitions. Word has length 25 [2021-06-05 21:14:57,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:57,696 INFO L482 AbstractCegarLoop]: Abstraction has 14919 states and 55591 transitions. [2021-06-05 21:14:57,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:57,697 INFO L276 IsEmpty]: Start isEmpty. Operand 14919 states and 55591 transitions. [2021-06-05 21:14:57,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:57,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:57,718 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:57,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:14:57,918 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:57,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:57,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2041606748, now seen corresponding path program 37 times [2021-06-05 21:14:57,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:57,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799039617] [2021-06-05 21:14:57,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:57,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:57,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799039617] [2021-06-05 21:14:57,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799039617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:57,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648878441] [2021-06-05 21:14:57,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:14:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:57,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:57,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:58,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:58,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648878441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:58,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:58,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:58,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013199900] [2021-06-05 21:14:58,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:58,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:58,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:58,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:58,085 INFO L87 Difference]: Start difference. First operand 14919 states and 55591 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:59,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:14:59,049 INFO L93 Difference]: Finished difference Result 16756 states and 60539 transitions. [2021-06-05 21:14:59,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 21:14:59,050 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:14:59,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:14:59,080 INFO L225 Difference]: With dead ends: 16756 [2021-06-05 21:14:59,080 INFO L226 Difference]: Without dead ends: 16735 [2021-06-05 21:14:59,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 665.0ms TimeCoverageRelationStatistics Valid=719, Invalid=2821, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 21:14:59,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16735 states. [2021-06-05 21:14:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16735 to 14809. [2021-06-05 21:14:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14809 states, 14808 states have (on average 3.7282549972987575) internal successors, (55208), 14808 states have internal predecessors, (55208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:59,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14809 states to 14809 states and 55208 transitions. [2021-06-05 21:14:59,331 INFO L78 Accepts]: Start accepts. Automaton has 14809 states and 55208 transitions. Word has length 25 [2021-06-05 21:14:59,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:14:59,331 INFO L482 AbstractCegarLoop]: Abstraction has 14809 states and 55208 transitions. [2021-06-05 21:14:59,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:14:59,331 INFO L276 IsEmpty]: Start isEmpty. Operand 14809 states and 55208 transitions. [2021-06-05 21:14:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:14:59,352 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:14:59,352 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:14:59,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 21:14:59,553 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:14:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:14:59,553 INFO L82 PathProgramCache]: Analyzing trace with hash 873025256, now seen corresponding path program 38 times [2021-06-05 21:14:59,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:14:59,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048703467] [2021-06-05 21:14:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:14:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:14:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:59,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:14:59,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048703467] [2021-06-05 21:14:59,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048703467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:59,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462521507] [2021-06-05 21:14:59,599 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 21:14:59,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:14:59,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:14:59,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:14:59,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:14:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:14:59,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462521507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:14:59,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:14:59,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:14:59,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762502533] [2021-06-05 21:14:59,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:14:59,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:14:59,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:14:59,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:14:59,733 INFO L87 Difference]: Start difference. First operand 14809 states and 55208 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:00,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:00,870 INFO L93 Difference]: Finished difference Result 18149 states and 65122 transitions. [2021-06-05 21:15:00,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 21:15:00,870 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:00,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:00,902 INFO L225 Difference]: With dead ends: 18149 [2021-06-05 21:15:00,902 INFO L226 Difference]: Without dead ends: 18145 [2021-06-05 21:15:00,902 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 748.9ms TimeCoverageRelationStatistics Valid=854, Invalid=2928, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 21:15:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18145 states. [2021-06-05 21:15:01,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18145 to 14779. [2021-06-05 21:15:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14779 states, 14778 states have (on average 3.7307484097983488) internal successors, (55133), 14778 states have internal predecessors, (55133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14779 states to 14779 states and 55133 transitions. [2021-06-05 21:15:01,158 INFO L78 Accepts]: Start accepts. Automaton has 14779 states and 55133 transitions. Word has length 25 [2021-06-05 21:15:01,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:01,158 INFO L482 AbstractCegarLoop]: Abstraction has 14779 states and 55133 transitions. [2021-06-05 21:15:01,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:01,159 INFO L276 IsEmpty]: Start isEmpty. Operand 14779 states and 55133 transitions. [2021-06-05 21:15:01,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:01,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:01,180 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:01,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 21:15:01,381 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:01,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:01,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1319636132, now seen corresponding path program 39 times [2021-06-05 21:15:01,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:01,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668988323] [2021-06-05 21:15:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:01,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:01,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668988323] [2021-06-05 21:15:01,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668988323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:01,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462242820] [2021-06-05 21:15:01,411 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 21:15:01,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:15:01,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:01,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:15:01,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:01,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462242820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:01,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:01,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:15:01,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351111309] [2021-06-05 21:15:01,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:01,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:01,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:01,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:01,531 INFO L87 Difference]: Start difference. First operand 14779 states and 55133 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:02,309 INFO L93 Difference]: Finished difference Result 22989 states and 82056 transitions. [2021-06-05 21:15:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 21:15:02,309 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:02,353 INFO L225 Difference]: With dead ends: 22989 [2021-06-05 21:15:02,353 INFO L226 Difference]: Without dead ends: 22969 [2021-06-05 21:15:02,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 482.5ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:15:02,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22969 states. [2021-06-05 21:15:02,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22969 to 14781. [2021-06-05 21:15:02,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14781 states, 14780 states have (on average 3.728146143437077) internal successors, (55102), 14780 states have internal predecessors, (55102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14781 states to 14781 states and 55102 transitions. [2021-06-05 21:15:02,738 INFO L78 Accepts]: Start accepts. Automaton has 14781 states and 55102 transitions. Word has length 25 [2021-06-05 21:15:02,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:02,738 INFO L482 AbstractCegarLoop]: Abstraction has 14781 states and 55102 transitions. [2021-06-05 21:15:02,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:02,738 INFO L276 IsEmpty]: Start isEmpty. Operand 14781 states and 55102 transitions. [2021-06-05 21:15:02,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:02,763 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:02,763 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:02,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-05 21:15:02,965 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:02,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:02,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1896120598, now seen corresponding path program 40 times [2021-06-05 21:15:02,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:02,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640887286] [2021-06-05 21:15:02,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:03,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:03,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640887286] [2021-06-05 21:15:03,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640887286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:03,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339959149] [2021-06-05 21:15:03,009 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 21:15:03,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:15:03,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:03,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:15:03,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:03,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339959149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:03,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:03,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:15:03,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472232598] [2021-06-05 21:15:03,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:03,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:03,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:03,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:03,120 INFO L87 Difference]: Start difference. First operand 14781 states and 55102 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:15:04,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:04,902 INFO L93 Difference]: Finished difference Result 37195 states and 132000 transitions. [2021-06-05 21:15:04,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-05 21:15:04,902 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 25 [2021-06-05 21:15:04,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:04,979 INFO L225 Difference]: With dead ends: 37195 [2021-06-05 21:15:04,979 INFO L226 Difference]: Without dead ends: 37167 [2021-06-05 21:15:04,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2981 ImplicationChecksByTransitivity, 1176.7ms TimeCoverageRelationStatistics Valid=1753, Invalid=6257, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 21:15:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37167 states. [2021-06-05 21:15:05,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37167 to 19078. [2021-06-05 21:15:05,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19078 states, 19077 states have (on average 3.8080410966084814) internal successors, (72646), 19077 states have internal predecessors, (72646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19078 states to 19078 states and 72646 transitions. [2021-06-05 21:15:05,603 INFO L78 Accepts]: Start accepts. Automaton has 19078 states and 72646 transitions. Word has length 25 [2021-06-05 21:15:05,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:05,603 INFO L482 AbstractCegarLoop]: Abstraction has 19078 states and 72646 transitions. [2021-06-05 21:15:05,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:15:05,603 INFO L276 IsEmpty]: Start isEmpty. Operand 19078 states and 72646 transitions. [2021-06-05 21:15:05,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:05,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:05,632 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:05,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:05,832 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:05,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:05,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1420289254, now seen corresponding path program 41 times [2021-06-05 21:15:05,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:05,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025592215] [2021-06-05 21:15:05,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:05,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:05,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025592215] [2021-06-05 21:15:05,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025592215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:05,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851048783] [2021-06-05 21:15:05,862 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 21:15:05,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:15:05,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:05,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:15:05,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:05,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:05,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851048783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:05,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:05,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:15:05,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108095372] [2021-06-05 21:15:05,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:05,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:05,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:05,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:05,996 INFO L87 Difference]: Start difference. First operand 19078 states and 72646 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:07,828 INFO L93 Difference]: Finished difference Result 43751 states and 153541 transitions. [2021-06-05 21:15:07,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 21:15:07,828 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:07,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:07,921 INFO L225 Difference]: With dead ends: 43751 [2021-06-05 21:15:07,921 INFO L226 Difference]: Without dead ends: 43723 [2021-06-05 21:15:07,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 1213.6ms TimeCoverageRelationStatistics Valid=1622, Invalid=5020, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 21:15:07,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43723 states. [2021-06-05 21:15:08,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43723 to 17718. [2021-06-05 21:15:08,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17718 states, 17717 states have (on average 3.7882259976293957) internal successors, (67116), 17717 states have internal predecessors, (67116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:08,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17718 states to 17718 states and 67116 transitions. [2021-06-05 21:15:08,548 INFO L78 Accepts]: Start accepts. Automaton has 17718 states and 67116 transitions. Word has length 25 [2021-06-05 21:15:08,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:08,548 INFO L482 AbstractCegarLoop]: Abstraction has 17718 states and 67116 transitions. [2021-06-05 21:15:08,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:08,548 INFO L276 IsEmpty]: Start isEmpty. Operand 17718 states and 67116 transitions. [2021-06-05 21:15:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:08,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:08,576 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:08,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:08,792 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:08,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:08,792 INFO L82 PathProgramCache]: Analyzing trace with hash 463223062, now seen corresponding path program 42 times [2021-06-05 21:15:08,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:08,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244322656] [2021-06-05 21:15:08,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:08,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:08,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:08,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244322656] [2021-06-05 21:15:08,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244322656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:08,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966805938] [2021-06-05 21:15:08,818 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 21:15:08,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:15:08,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:08,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:15:08,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:08,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966805938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:08,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:08,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:15:08,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262221636] [2021-06-05 21:15:08,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:08,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:08,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:08,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:08,926 INFO L87 Difference]: Start difference. First operand 17718 states and 67116 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:15:10,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:10,663 INFO L93 Difference]: Finished difference Result 38872 states and 138147 transitions. [2021-06-05 21:15:10,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-05 21:15:10,663 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 25 [2021-06-05 21:15:10,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:10,744 INFO L225 Difference]: With dead ends: 38872 [2021-06-05 21:15:10,744 INFO L226 Difference]: Without dead ends: 38848 [2021-06-05 21:15:10,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2565 ImplicationChecksByTransitivity, 1099.3ms TimeCoverageRelationStatistics Valid=1644, Invalid=5666, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 21:15:10,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38848 states. [2021-06-05 21:15:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38848 to 18921. [2021-06-05 21:15:11,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18921 states, 18920 states have (on average 3.831553911205074) internal successors, (72493), 18920 states have internal predecessors, (72493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:11,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18921 states to 18921 states and 72493 transitions. [2021-06-05 21:15:11,378 INFO L78 Accepts]: Start accepts. Automaton has 18921 states and 72493 transitions. Word has length 25 [2021-06-05 21:15:11,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:11,378 INFO L482 AbstractCegarLoop]: Abstraction has 18921 states and 72493 transitions. [2021-06-05 21:15:11,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:15:11,378 INFO L276 IsEmpty]: Start isEmpty. Operand 18921 states and 72493 transitions. [2021-06-05 21:15:11,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:11,406 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:11,406 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:11,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 21:15:11,606 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:11,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:11,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1441780506, now seen corresponding path program 43 times [2021-06-05 21:15:11,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:11,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849921686] [2021-06-05 21:15:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:11,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:11,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:11,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:11,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849921686] [2021-06-05 21:15:11,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849921686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:11,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171550924] [2021-06-05 21:15:11,635 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 21:15:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:11,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:15:11,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:11,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171550924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:11,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:11,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:15:11,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512070670] [2021-06-05 21:15:11,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:11,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:11,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:11,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:11,748 INFO L87 Difference]: Start difference. First operand 18921 states and 72493 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:13,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:13,213 INFO L93 Difference]: Finished difference Result 43856 states and 155486 transitions. [2021-06-05 21:15:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 21:15:13,213 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:13,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:13,303 INFO L225 Difference]: With dead ends: 43856 [2021-06-05 21:15:13,303 INFO L226 Difference]: Without dead ends: 43856 [2021-06-05 21:15:13,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 925.0ms TimeCoverageRelationStatistics Valid=1246, Invalid=3584, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 21:15:13,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43856 states. [2021-06-05 21:15:13,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43856 to 19178. [2021-06-05 21:15:13,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19178 states, 19177 states have (on average 3.8273452573395215) internal successors, (73397), 19177 states have internal predecessors, (73397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19178 states to 19178 states and 73397 transitions. [2021-06-05 21:15:13,867 INFO L78 Accepts]: Start accepts. Automaton has 19178 states and 73397 transitions. Word has length 25 [2021-06-05 21:15:13,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:13,867 INFO L482 AbstractCegarLoop]: Abstraction has 19178 states and 73397 transitions. [2021-06-05 21:15:13,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:13,867 INFO L276 IsEmpty]: Start isEmpty. Operand 19178 states and 73397 transitions. [2021-06-05 21:15:14,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:14,003 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:14,003 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:14,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 21:15:14,210 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:14,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:14,211 INFO L82 PathProgramCache]: Analyzing trace with hash -830468258, now seen corresponding path program 44 times [2021-06-05 21:15:14,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:14,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102985133] [2021-06-05 21:15:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:14,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:14,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:14,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102985133] [2021-06-05 21:15:14,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102985133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:14,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711647906] [2021-06-05 21:15:14,246 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 21:15:14,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:15:14,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:14,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:15:14,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:14,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:14,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711647906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:14,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:14,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:15:14,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097668715] [2021-06-05 21:15:14,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:14,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:14,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:14,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:14,356 INFO L87 Difference]: Start difference. First operand 19178 states and 73397 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:15:15,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:15,722 INFO L93 Difference]: Finished difference Result 29040 states and 104169 transitions. [2021-06-05 21:15:15,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 21:15:15,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 25 [2021-06-05 21:15:15,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:15,780 INFO L225 Difference]: With dead ends: 29040 [2021-06-05 21:15:15,781 INFO L226 Difference]: Without dead ends: 29016 [2021-06-05 21:15:15,781 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 874.9ms TimeCoverageRelationStatistics Valid=1260, Invalid=4746, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 21:15:15,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29016 states. [2021-06-05 21:15:16,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29016 to 19204. [2021-06-05 21:15:16,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19204 states, 19203 states have (on average 3.8270061969483935) internal successors, (73490), 19203 states have internal predecessors, (73490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:16,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19204 states to 19204 states and 73490 transitions. [2021-06-05 21:15:16,211 INFO L78 Accepts]: Start accepts. Automaton has 19204 states and 73490 transitions. Word has length 25 [2021-06-05 21:15:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:16,211 INFO L482 AbstractCegarLoop]: Abstraction has 19204 states and 73490 transitions. [2021-06-05 21:15:16,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:15:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 19204 states and 73490 transitions. [2021-06-05 21:15:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:16,239 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:16,239 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:16,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:16,439 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:16,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:16,439 INFO L82 PathProgramCache]: Analyzing trace with hash 470709726, now seen corresponding path program 45 times [2021-06-05 21:15:16,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:16,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002139598] [2021-06-05 21:15:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:16,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:16,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002139598] [2021-06-05 21:15:16,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002139598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:16,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653512156] [2021-06-05 21:15:16,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:15:16,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:15:16,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:16,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:15:16,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:16,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653512156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:16,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:16,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:15:16,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286436342] [2021-06-05 21:15:16,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:16,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:16,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:16,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:16,578 INFO L87 Difference]: Start difference. First operand 19204 states and 73490 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:17,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:17,736 INFO L93 Difference]: Finished difference Result 27755 states and 100625 transitions. [2021-06-05 21:15:17,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 21:15:17,737 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:17,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:17,805 INFO L225 Difference]: With dead ends: 27755 [2021-06-05 21:15:17,805 INFO L226 Difference]: Without dead ends: 27721 [2021-06-05 21:15:17,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 698.4ms TimeCoverageRelationStatistics Valid=755, Invalid=2551, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 21:15:17,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27721 states. [2021-06-05 21:15:18,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27721 to 19202. [2021-06-05 21:15:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19202 states, 19201 states have (on average 3.826988177699078) internal successors, (73482), 19201 states have internal predecessors, (73482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:18,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19202 states to 19202 states and 73482 transitions. [2021-06-05 21:15:18,316 INFO L78 Accepts]: Start accepts. Automaton has 19202 states and 73482 transitions. Word has length 25 [2021-06-05 21:15:18,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:18,317 INFO L482 AbstractCegarLoop]: Abstraction has 19202 states and 73482 transitions. [2021-06-05 21:15:18,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:18,317 INFO L276 IsEmpty]: Start isEmpty. Operand 19202 states and 73482 transitions. [2021-06-05 21:15:18,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:18,348 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:18,348 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:18,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 21:15:18,548 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:18,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:18,549 INFO L82 PathProgramCache]: Analyzing trace with hash 472331746, now seen corresponding path program 46 times [2021-06-05 21:15:18,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:18,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185280292] [2021-06-05 21:15:18,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:18,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:18,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185280292] [2021-06-05 21:15:18,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185280292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:18,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355193917] [2021-06-05 21:15:18,579 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 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 21:15:18,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:15:18,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:18,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:15:18,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:18,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355193917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:18,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:18,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:15:18,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001069242] [2021-06-05 21:15:18,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:18,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:18,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:18,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:18,700 INFO L87 Difference]: Start difference. First operand 19202 states and 73482 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:20,237 INFO L93 Difference]: Finished difference Result 47167 states and 167443 transitions. [2021-06-05 21:15:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 21:15:20,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:20,334 INFO L225 Difference]: With dead ends: 47167 [2021-06-05 21:15:20,334 INFO L226 Difference]: Without dead ends: 47160 [2021-06-05 21:15:20,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 983.7ms TimeCoverageRelationStatistics Valid=1348, Invalid=4054, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 21:15:20,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47160 states. [2021-06-05 21:15:20,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47160 to 19624. [2021-06-05 21:15:20,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19624 states, 19623 states have (on average 3.8511440656372624) internal successors, (75571), 19623 states have internal predecessors, (75571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19624 states to 19624 states and 75571 transitions. [2021-06-05 21:15:21,069 INFO L78 Accepts]: Start accepts. Automaton has 19624 states and 75571 transitions. Word has length 25 [2021-06-05 21:15:21,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:21,070 INFO L482 AbstractCegarLoop]: Abstraction has 19624 states and 75571 transitions. [2021-06-05 21:15:21,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:21,070 INFO L276 IsEmpty]: Start isEmpty. Operand 19624 states and 75571 transitions. [2021-06-05 21:15:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:21,098 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:21,098 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:21,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:21,299 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:21,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:21,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1647610214, now seen corresponding path program 47 times [2021-06-05 21:15:21,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:21,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046810561] [2021-06-05 21:15:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:21,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:21,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046810561] [2021-06-05 21:15:21,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046810561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:21,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937836225] [2021-06-05 21:15:21,326 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 21:15:21,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:15:21,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:21,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:15:21,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:21,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937836225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:21,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:21,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:15:21,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622910563] [2021-06-05 21:15:21,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:21,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:21,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:21,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:21,440 INFO L87 Difference]: Start difference. First operand 19624 states and 75571 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:22,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:22,761 INFO L93 Difference]: Finished difference Result 40091 states and 144259 transitions. [2021-06-05 21:15:22,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 21:15:22,761 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:22,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:22,847 INFO L225 Difference]: With dead ends: 40091 [2021-06-05 21:15:22,847 INFO L226 Difference]: Without dead ends: 40051 [2021-06-05 21:15:22,848 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 819.5ms TimeCoverageRelationStatistics Valid=1088, Invalid=3604, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 21:15:22,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40051 states. [2021-06-05 21:15:23,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40051 to 19621. [2021-06-05 21:15:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19621 states, 19620 states have (on average 3.849796126401631) internal successors, (75533), 19620 states have internal predecessors, (75533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19621 states to 19621 states and 75533 transitions. [2021-06-05 21:15:23,372 INFO L78 Accepts]: Start accepts. Automaton has 19621 states and 75533 transitions. Word has length 25 [2021-06-05 21:15:23,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:23,372 INFO L482 AbstractCegarLoop]: Abstraction has 19621 states and 75533 transitions. [2021-06-05 21:15:23,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:23,372 INFO L276 IsEmpty]: Start isEmpty. Operand 19621 states and 75533 transitions. [2021-06-05 21:15:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:23,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:23,400 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:23,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 21:15:23,600 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:23,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:23,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1462510574, now seen corresponding path program 48 times [2021-06-05 21:15:23,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:23,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212553353] [2021-06-05 21:15:23,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:23,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:23,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212553353] [2021-06-05 21:15:23,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212553353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:23,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609856758] [2021-06-05 21:15:23,629 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 21:15:23,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:15:23,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:23,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:15:23,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:23,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609856758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:23,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:23,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:15:23,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526537719] [2021-06-05 21:15:23,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:23,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:23,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:23,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:23,741 INFO L87 Difference]: Start difference. First operand 19621 states and 75533 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:25,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:25,717 INFO L93 Difference]: Finished difference Result 45330 states and 159537 transitions. [2021-06-05 21:15:25,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 21:15:25,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:25,810 INFO L225 Difference]: With dead ends: 45330 [2021-06-05 21:15:25,810 INFO L226 Difference]: Without dead ends: 45295 [2021-06-05 21:15:25,810 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 1270.1ms TimeCoverageRelationStatistics Valid=1621, Invalid=5185, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 21:15:25,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45295 states. [2021-06-05 21:15:26,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45295 to 23060. [2021-06-05 21:15:26,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23060 states, 23059 states have (on average 3.8386747040201223) internal successors, (88516), 23059 states have internal predecessors, (88516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:26,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23060 states to 23060 states and 88516 transitions. [2021-06-05 21:15:26,394 INFO L78 Accepts]: Start accepts. Automaton has 23060 states and 88516 transitions. Word has length 25 [2021-06-05 21:15:26,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:26,394 INFO L482 AbstractCegarLoop]: Abstraction has 23060 states and 88516 transitions. [2021-06-05 21:15:26,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:26,394 INFO L276 IsEmpty]: Start isEmpty. Operand 23060 states and 88516 transitions. [2021-06-05 21:15:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:26,429 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:26,429 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:26,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:26,629 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1491412058, now seen corresponding path program 49 times [2021-06-05 21:15:26,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:26,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081493434] [2021-06-05 21:15:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:26,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:26,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081493434] [2021-06-05 21:15:26,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081493434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:26,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828947747] [2021-06-05 21:15:26,658 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 21:15:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:26,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:15:26,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:26,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828947747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:26,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:26,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:15:26,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873656083] [2021-06-05 21:15:26,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:26,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:26,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:26,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:26,771 INFO L87 Difference]: Start difference. First operand 23060 states and 88516 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:27,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:27,781 INFO L93 Difference]: Finished difference Result 35887 states and 129882 transitions. [2021-06-05 21:15:27,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 21:15:27,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:27,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:27,854 INFO L225 Difference]: With dead ends: 35887 [2021-06-05 21:15:27,854 INFO L226 Difference]: Without dead ends: 35838 [2021-06-05 21:15:27,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 648.6ms TimeCoverageRelationStatistics Valid=517, Invalid=1835, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:15:27,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35838 states. [2021-06-05 21:15:28,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35838 to 23291. [2021-06-05 21:15:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23291 states, 23290 states have (on average 3.831429798196651) internal successors, (89234), 23290 states have internal predecessors, (89234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:28,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23291 states to 23291 states and 89234 transitions. [2021-06-05 21:15:28,533 INFO L78 Accepts]: Start accepts. Automaton has 23291 states and 89234 transitions. Word has length 25 [2021-06-05 21:15:28,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:28,533 INFO L482 AbstractCegarLoop]: Abstraction has 23291 states and 89234 transitions. [2021-06-05 21:15:28,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:28,533 INFO L276 IsEmpty]: Start isEmpty. Operand 23291 states and 89234 transitions. [2021-06-05 21:15:28,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:28,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:28,566 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:28,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 21:15:28,767 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:28,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:28,767 INFO L82 PathProgramCache]: Analyzing trace with hash -340397470, now seen corresponding path program 50 times [2021-06-05 21:15:28,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:28,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588267728] [2021-06-05 21:15:28,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:28,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:28,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588267728] [2021-06-05 21:15:28,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588267728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:28,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776781107] [2021-06-05 21:15:28,813 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:15:28,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:15:28,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:28,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:15:28,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:28,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:28,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776781107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:28,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:28,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:15:28,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510266215] [2021-06-05 21:15:28,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:28,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:28,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:28,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:28,935 INFO L87 Difference]: Start difference. First operand 23291 states and 89234 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:29,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:29,700 INFO L93 Difference]: Finished difference Result 40122 states and 145058 transitions. [2021-06-05 21:15:29,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:15:29,700 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:29,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:29,782 INFO L225 Difference]: With dead ends: 40122 [2021-06-05 21:15:29,782 INFO L226 Difference]: Without dead ends: 40122 [2021-06-05 21:15:29,783 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 475.4ms TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:15:29,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40122 states. [2021-06-05 21:15:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40122 to 23660. [2021-06-05 21:15:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23660 states, 23659 states have (on average 3.8405258041337333) internal successors, (90863), 23659 states have internal predecessors, (90863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:30,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23660 states to 23660 states and 90863 transitions. [2021-06-05 21:15:30,349 INFO L78 Accepts]: Start accepts. Automaton has 23660 states and 90863 transitions. Word has length 25 [2021-06-05 21:15:30,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:30,349 INFO L482 AbstractCegarLoop]: Abstraction has 23660 states and 90863 transitions. [2021-06-05 21:15:30,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:30,349 INFO L276 IsEmpty]: Start isEmpty. Operand 23660 states and 90863 transitions. [2021-06-05 21:15:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:30,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:30,384 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:30,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:30,584 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:30,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:30,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2136719838, now seen corresponding path program 51 times [2021-06-05 21:15:30,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:30,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883326260] [2021-06-05 21:15:30,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:30,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:30,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883326260] [2021-06-05 21:15:30,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883326260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:30,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042959729] [2021-06-05 21:15:30,618 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 21:15:30,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:15:30,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:30,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:15:30,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:30,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042959729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:30,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:30,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:15:30,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124202347] [2021-06-05 21:15:30,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:15:30,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:30,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:15:30,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:15:30,761 INFO L87 Difference]: Start difference. First operand 23660 states and 90863 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:32,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:32,309 INFO L93 Difference]: Finished difference Result 36984 states and 135370 transitions. [2021-06-05 21:15:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 21:15:32,309 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:32,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:32,377 INFO L225 Difference]: With dead ends: 36984 [2021-06-05 21:15:32,377 INFO L226 Difference]: Without dead ends: 36984 [2021-06-05 21:15:32,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1930 ImplicationChecksByTransitivity, 931.1ms TimeCoverageRelationStatistics Valid=1100, Invalid=4302, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 21:15:32,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36984 states. [2021-06-05 21:15:32,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36984 to 23774. [2021-06-05 21:15:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23774 states, 23773 states have (on average 3.8443191856307575) internal successors, (91391), 23773 states have internal predecessors, (91391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23774 states to 23774 states and 91391 transitions. [2021-06-05 21:15:32,883 INFO L78 Accepts]: Start accepts. Automaton has 23774 states and 91391 transitions. Word has length 25 [2021-06-05 21:15:32,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:32,883 INFO L482 AbstractCegarLoop]: Abstraction has 23774 states and 91391 transitions. [2021-06-05 21:15:32,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:32,883 INFO L276 IsEmpty]: Start isEmpty. Operand 23774 states and 91391 transitions. [2021-06-05 21:15:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:32,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:32,918 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:33,118 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:33,118 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:33,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:33,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1764860382, now seen corresponding path program 52 times [2021-06-05 21:15:33,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:33,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938126505] [2021-06-05 21:15:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:33,151 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:33,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:33,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938126505] [2021-06-05 21:15:33,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938126505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:33,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021650611] [2021-06-05 21:15:33,152 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 21:15:33,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:15:33,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:33,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:15:33,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:33,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:33,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021650611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:33,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:33,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:15:33,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161104701] [2021-06-05 21:15:33,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:15:33,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:33,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:15:33,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:15:33,282 INFO L87 Difference]: Start difference. First operand 23774 states and 91391 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:34,783 INFO L93 Difference]: Finished difference Result 37247 states and 136569 transitions. [2021-06-05 21:15:34,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 21:15:34,784 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:34,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:34,861 INFO L225 Difference]: With dead ends: 37247 [2021-06-05 21:15:34,861 INFO L226 Difference]: Without dead ends: 37247 [2021-06-05 21:15:34,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2049 ImplicationChecksByTransitivity, 952.8ms TimeCoverageRelationStatistics Valid=1145, Invalid=4555, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 21:15:34,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37247 states. [2021-06-05 21:15:35,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37247 to 23804. [2021-06-05 21:15:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23804 states, 23803 states have (on average 3.842792925261522) internal successors, (91470), 23803 states have internal predecessors, (91470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:35,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23804 states to 23804 states and 91470 transitions. [2021-06-05 21:15:35,387 INFO L78 Accepts]: Start accepts. Automaton has 23804 states and 91470 transitions. Word has length 25 [2021-06-05 21:15:35,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:35,387 INFO L482 AbstractCegarLoop]: Abstraction has 23804 states and 91470 transitions. [2021-06-05 21:15:35,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:35,387 INFO L276 IsEmpty]: Start isEmpty. Operand 23804 states and 91470 transitions. [2021-06-05 21:15:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:35,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:35,562 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:35,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:35,762 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:35,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:35,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1834627866, now seen corresponding path program 53 times [2021-06-05 21:15:35,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:35,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611380015] [2021-06-05 21:15:35,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:35,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:35,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611380015] [2021-06-05 21:15:35,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611380015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:35,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620996104] [2021-06-05 21:15:35,795 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 21:15:35,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:15:35,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:35,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:15:35,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:35,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620996104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:35,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:35,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:15:35,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573114885] [2021-06-05 21:15:35,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:35,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:35,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:35,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:35,913 INFO L87 Difference]: Start difference. First operand 23804 states and 91470 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:36,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:36,725 INFO L93 Difference]: Finished difference Result 37636 states and 136760 transitions. [2021-06-05 21:15:36,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:15:36,725 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:36,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:36,807 INFO L225 Difference]: With dead ends: 37636 [2021-06-05 21:15:36,808 INFO L226 Difference]: Without dead ends: 37618 [2021-06-05 21:15:36,808 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 490.0ms TimeCoverageRelationStatistics Valid=366, Invalid=1356, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 21:15:36,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37618 states. [2021-06-05 21:15:37,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37618 to 23768. [2021-06-05 21:15:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23768 states, 23767 states have (on average 3.8401565195439056) internal successors, (91269), 23767 states have internal predecessors, (91269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23768 states to 23768 states and 91269 transitions. [2021-06-05 21:15:37,409 INFO L78 Accepts]: Start accepts. Automaton has 23768 states and 91269 transitions. Word has length 25 [2021-06-05 21:15:37,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:37,409 INFO L482 AbstractCegarLoop]: Abstraction has 23768 states and 91269 transitions. [2021-06-05 21:15:37,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:37,409 INFO L276 IsEmpty]: Start isEmpty. Operand 23768 states and 91269 transitions. [2021-06-05 21:15:37,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:37,446 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:37,446 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:37,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 21:15:37,646 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:37,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:37,647 INFO L82 PathProgramCache]: Analyzing trace with hash 2007733018, now seen corresponding path program 54 times [2021-06-05 21:15:37,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:37,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868934721] [2021-06-05 21:15:37,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:37,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:37,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868934721] [2021-06-05 21:15:37,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868934721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:37,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166029301] [2021-06-05 21:15:37,689 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 21:15:37,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:15:37,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:37,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:15:37,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:37,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166029301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:37,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:37,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:15:37,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122808915] [2021-06-05 21:15:37,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:15:37,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:37,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:15:37,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:15:37,819 INFO L87 Difference]: Start difference. First operand 23768 states and 91269 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:39,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:39,369 INFO L93 Difference]: Finished difference Result 30994 states and 113478 transitions. [2021-06-05 21:15:39,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 21:15:39,370 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:39,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:39,434 INFO L225 Difference]: With dead ends: 30994 [2021-06-05 21:15:39,434 INFO L226 Difference]: Without dead ends: 30990 [2021-06-05 21:15:39,435 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 1040.7ms TimeCoverageRelationStatistics Valid=1261, Invalid=4439, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 21:15:39,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30990 states. [2021-06-05 21:15:39,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30990 to 24082. [2021-06-05 21:15:39,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24082 states, 24081 states have (on average 3.8476392176404635) internal successors, (92655), 24081 states have internal predecessors, (92655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24082 states to 24082 states and 92655 transitions. [2021-06-05 21:15:39,934 INFO L78 Accepts]: Start accepts. Automaton has 24082 states and 92655 transitions. Word has length 25 [2021-06-05 21:15:39,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:39,935 INFO L482 AbstractCegarLoop]: Abstraction has 24082 states and 92655 transitions. [2021-06-05 21:15:39,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:39,935 INFO L276 IsEmpty]: Start isEmpty. Operand 24082 states and 92655 transitions. [2021-06-05 21:15:40,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:40,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:40,101 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:40,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:40,302 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:40,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1250552554, now seen corresponding path program 55 times [2021-06-05 21:15:40,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:40,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764810820] [2021-06-05 21:15:40,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:40,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:40,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764810820] [2021-06-05 21:15:40,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764810820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:40,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240529354] [2021-06-05 21:15:40,335 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 21:15:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:40,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:15:40,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:40,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240529354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:40,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:40,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:15:40,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838580638] [2021-06-05 21:15:40,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:15:40,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:15:40,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:15:40,471 INFO L87 Difference]: Start difference. First operand 24082 states and 92655 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:41,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:41,932 INFO L93 Difference]: Finished difference Result 30939 states and 113510 transitions. [2021-06-05 21:15:41,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 21:15:41,933 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:41,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:41,996 INFO L225 Difference]: With dead ends: 30939 [2021-06-05 21:15:41,996 INFO L226 Difference]: Without dead ends: 30933 [2021-06-05 21:15:41,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 962.3ms TimeCoverageRelationStatistics Valid=1160, Invalid=4096, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 21:15:42,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30933 states. [2021-06-05 21:15:42,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30933 to 24064. [2021-06-05 21:15:42,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24064 states, 24063 states have (on average 3.845779827951627) internal successors, (92541), 24063 states have internal predecessors, (92541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:42,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24064 states to 24064 states and 92541 transitions. [2021-06-05 21:15:42,483 INFO L78 Accepts]: Start accepts. Automaton has 24064 states and 92541 transitions. Word has length 25 [2021-06-05 21:15:42,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:42,483 INFO L482 AbstractCegarLoop]: Abstraction has 24064 states and 92541 transitions. [2021-06-05 21:15:42,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:42,484 INFO L276 IsEmpty]: Start isEmpty. Operand 24064 states and 92541 transitions. [2021-06-05 21:15:42,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:42,520 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:42,520 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:42,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 21:15:42,720 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:42,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:42,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1799330538, now seen corresponding path program 56 times [2021-06-05 21:15:42,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:42,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053882295] [2021-06-05 21:15:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:42,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:42,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053882295] [2021-06-05 21:15:42,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053882295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:42,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717849505] [2021-06-05 21:15:42,754 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 21:15:42,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:15:42,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:42,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:15:42,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:42,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717849505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:42,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:42,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:15:42,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256975216] [2021-06-05 21:15:42,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:15:42,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:42,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:15:42,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:15:42,885 INFO L87 Difference]: Start difference. First operand 24064 states and 92541 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:43,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:43,989 INFO L93 Difference]: Finished difference Result 26880 states and 100808 transitions. [2021-06-05 21:15:43,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 21:15:43,989 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:43,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:44,052 INFO L225 Difference]: With dead ends: 26880 [2021-06-05 21:15:44,053 INFO L226 Difference]: Without dead ends: 26852 [2021-06-05 21:15:44,053 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 717.8ms TimeCoverageRelationStatistics Valid=814, Invalid=3092, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 21:15:44,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26852 states. [2021-06-05 21:15:44,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26852 to 24166. [2021-06-05 21:15:44,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24166 states, 24165 states have (on average 3.8445272087730187) internal successors, (92903), 24165 states have internal predecessors, (92903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24166 states to 24166 states and 92903 transitions. [2021-06-05 21:15:44,699 INFO L78 Accepts]: Start accepts. Automaton has 24166 states and 92903 transitions. Word has length 25 [2021-06-05 21:15:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:44,699 INFO L482 AbstractCegarLoop]: Abstraction has 24166 states and 92903 transitions. [2021-06-05 21:15:44,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:44,699 INFO L276 IsEmpty]: Start isEmpty. Operand 24166 states and 92903 transitions. [2021-06-05 21:15:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:44,735 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:44,735 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:44,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 21:15:44,936 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:44,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:44,936 INFO L82 PathProgramCache]: Analyzing trace with hash -694735846, now seen corresponding path program 57 times [2021-06-05 21:15:44,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:44,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427035694] [2021-06-05 21:15:44,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:44,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:44,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427035694] [2021-06-05 21:15:44,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427035694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:44,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854550051] [2021-06-05 21:15:44,980 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 21:15:45,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:15:45,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:45,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:15:45,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:45,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854550051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:45,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:45,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:15:45,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110609087] [2021-06-05 21:15:45,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:15:45,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:45,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:15:45,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:15:45,105 INFO L87 Difference]: Start difference. First operand 24166 states and 92903 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:15:46,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:46,459 INFO L93 Difference]: Finished difference Result 27190 states and 101686 transitions. [2021-06-05 21:15:46,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 21:15:46,460 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-06-05 21:15:46,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:46,517 INFO L225 Difference]: With dead ends: 27190 [2021-06-05 21:15:46,517 INFO L226 Difference]: Without dead ends: 27184 [2021-06-05 21:15:46,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 921.8ms TimeCoverageRelationStatistics Valid=1157, Invalid=4245, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 21:15:46,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27184 states. [2021-06-05 21:15:46,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27184 to 24111. [2021-06-05 21:15:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24111 states, 24110 states have (on average 3.8443384487764414) internal successors, (92687), 24110 states have internal predecessors, (92687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:46,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24111 states to 24111 states and 92687 transitions. [2021-06-05 21:15:46,953 INFO L78 Accepts]: Start accepts. Automaton has 24111 states and 92687 transitions. Word has length 25 [2021-06-05 21:15:46,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:46,953 INFO L482 AbstractCegarLoop]: Abstraction has 24111 states and 92687 transitions. [2021-06-05 21:15:46,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:15:46,953 INFO L276 IsEmpty]: Start isEmpty. Operand 24111 states and 92687 transitions. [2021-06-05 21:15:46,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:46,989 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:46,989 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:47,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:47,193 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:47,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:47,193 INFO L82 PathProgramCache]: Analyzing trace with hash -715975424, now seen corresponding path program 58 times [2021-06-05 21:15:47,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:47,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872000000] [2021-06-05 21:15:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:47,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:47,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872000000] [2021-06-05 21:15:47,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872000000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:47,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43091005] [2021-06-05 21:15:47,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:15:47,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:15:47,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:47,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:15:47,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:47,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43091005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:47,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:47,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:15:47,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746363017] [2021-06-05 21:15:47,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:15:47,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:47,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:15:47,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:15:47,337 INFO L87 Difference]: Start difference. First operand 24111 states and 92687 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:47,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:47,962 INFO L93 Difference]: Finished difference Result 34704 states and 128099 transitions. [2021-06-05 21:15:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:15:47,963 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:47,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:48,036 INFO L225 Difference]: With dead ends: 34704 [2021-06-05 21:15:48,036 INFO L226 Difference]: Without dead ends: 34676 [2021-06-05 21:15:48,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:15:48,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34676 states. [2021-06-05 21:15:48,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34676 to 24102. [2021-06-05 21:15:48,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24102 states, 24101 states have (on average 3.842994066636239) internal successors, (92620), 24101 states have internal predecessors, (92620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24102 states to 24102 states and 92620 transitions. [2021-06-05 21:15:48,542 INFO L78 Accepts]: Start accepts. Automaton has 24102 states and 92620 transitions. Word has length 25 [2021-06-05 21:15:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:48,542 INFO L482 AbstractCegarLoop]: Abstraction has 24102 states and 92620 transitions. [2021-06-05 21:15:48,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:48,542 INFO L276 IsEmpty]: Start isEmpty. Operand 24102 states and 92620 transitions. [2021-06-05 21:15:48,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:48,576 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:48,576 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:48,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:48,778 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:48,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:48,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1721582306, now seen corresponding path program 59 times [2021-06-05 21:15:48,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:48,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503370221] [2021-06-05 21:15:48,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:48,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:48,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503370221] [2021-06-05 21:15:48,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503370221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:48,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966465633] [2021-06-05 21:15:48,821 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 21:15:48,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:15:48,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:48,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:15:48,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:48,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:48,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966465633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:48,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:48,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:15:48,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148484351] [2021-06-05 21:15:48,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:15:48,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:48,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:15:48,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:15:48,946 INFO L87 Difference]: Start difference. First operand 24102 states and 92620 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:49,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:49,938 INFO L93 Difference]: Finished difference Result 27178 states and 102221 transitions. [2021-06-05 21:15:49,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 21:15:49,939 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:49,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:49,995 INFO L225 Difference]: With dead ends: 27178 [2021-06-05 21:15:49,995 INFO L226 Difference]: Without dead ends: 27094 [2021-06-05 21:15:49,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 651.6ms TimeCoverageRelationStatistics Valid=595, Invalid=2161, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 21:15:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27094 states. [2021-06-05 21:15:50,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27094 to 24246. [2021-06-05 21:15:50,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24246 states, 24245 states have (on average 3.8435553722416995) internal successors, (93187), 24245 states have internal predecessors, (93187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:50,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24246 states to 24246 states and 93187 transitions. [2021-06-05 21:15:50,454 INFO L78 Accepts]: Start accepts. Automaton has 24246 states and 93187 transitions. Word has length 25 [2021-06-05 21:15:50,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:50,454 INFO L482 AbstractCegarLoop]: Abstraction has 24246 states and 93187 transitions. [2021-06-05 21:15:50,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:50,454 INFO L276 IsEmpty]: Start isEmpty. Operand 24246 states and 93187 transitions. [2021-06-05 21:15:50,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:50,489 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:50,489 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:50,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 21:15:50,690 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:50,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:50,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1187692774, now seen corresponding path program 60 times [2021-06-05 21:15:50,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:50,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485162657] [2021-06-05 21:15:50,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:50,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:50,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485162657] [2021-06-05 21:15:50,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485162657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:50,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486628270] [2021-06-05 21:15:50,724 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 21:15:50,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:15:50,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:50,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:15:50,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:50,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486628270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:50,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:50,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:15:50,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021150379] [2021-06-05 21:15:50,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:15:50,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:50,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:15:50,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:15:50,849 INFO L87 Difference]: Start difference. First operand 24246 states and 93187 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:51,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:51,934 INFO L93 Difference]: Finished difference Result 28189 states and 105216 transitions. [2021-06-05 21:15:51,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 21:15:51,934 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:51,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:51,992 INFO L225 Difference]: With dead ends: 28189 [2021-06-05 21:15:51,992 INFO L226 Difference]: Without dead ends: 28161 [2021-06-05 21:15:51,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 686.7ms TimeCoverageRelationStatistics Valid=714, Invalid=2478, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 21:15:52,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28161 states. [2021-06-05 21:15:52,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28161 to 24662. [2021-06-05 21:15:52,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24662 states, 24661 states have (on average 3.841287863428085) internal successors, (94730), 24661 states have internal predecessors, (94730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24662 states to 24662 states and 94730 transitions. [2021-06-05 21:15:52,456 INFO L78 Accepts]: Start accepts. Automaton has 24662 states and 94730 transitions. Word has length 25 [2021-06-05 21:15:52,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:52,457 INFO L482 AbstractCegarLoop]: Abstraction has 24662 states and 94730 transitions. [2021-06-05 21:15:52,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:52,457 INFO L276 IsEmpty]: Start isEmpty. Operand 24662 states and 94730 transitions. [2021-06-05 21:15:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:52,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:52,495 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:52,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:52,695 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:52,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:52,695 INFO L82 PathProgramCache]: Analyzing trace with hash -83098082, now seen corresponding path program 61 times [2021-06-05 21:15:52,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:52,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247896308] [2021-06-05 21:15:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:52,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:52,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247896308] [2021-06-05 21:15:52,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247896308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:52,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888986467] [2021-06-05 21:15:52,732 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 21:15:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:52,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:15:52,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:52,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:52,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888986467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:52,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:52,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:15:52,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365424084] [2021-06-05 21:15:52,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:15:52,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:52,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:15:52,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:15:52,858 INFO L87 Difference]: Start difference. First operand 24662 states and 94730 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:15:54,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:54,150 INFO L93 Difference]: Finished difference Result 28562 states and 106272 transitions. [2021-06-05 21:15:54,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 21:15:54,150 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-06-05 21:15:54,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:54,209 INFO L225 Difference]: With dead ends: 28562 [2021-06-05 21:15:54,209 INFO L226 Difference]: Without dead ends: 28562 [2021-06-05 21:15:54,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 808.1ms TimeCoverageRelationStatistics Valid=915, Invalid=2991, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 21:15:54,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28562 states. [2021-06-05 21:15:54,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28562 to 24461. [2021-06-05 21:15:54,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24461 states, 24460 states have (on average 3.8440719542109565) internal successors, (94026), 24460 states have internal predecessors, (94026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24461 states to 24461 states and 94026 transitions. [2021-06-05 21:15:54,677 INFO L78 Accepts]: Start accepts. Automaton has 24461 states and 94026 transitions. Word has length 25 [2021-06-05 21:15:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:54,677 INFO L482 AbstractCegarLoop]: Abstraction has 24461 states and 94026 transitions. [2021-06-05 21:15:54,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:15:54,677 INFO L276 IsEmpty]: Start isEmpty. Operand 24461 states and 94026 transitions. [2021-06-05 21:15:54,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:54,715 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:54,715 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:54,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:54,915 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:54,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:54,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1085733342, now seen corresponding path program 62 times [2021-06-05 21:15:54,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:54,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029210420] [2021-06-05 21:15:54,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:54,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:54,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029210420] [2021-06-05 21:15:54,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029210420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:54,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334569402] [2021-06-05 21:15:54,948 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 21:15:54,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:15:54,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:54,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:15:54,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:55,078 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:55,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334569402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:55,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:55,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:15:55,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705629098] [2021-06-05 21:15:55,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:15:55,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:55,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:15:55,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:15:55,079 INFO L87 Difference]: Start difference. First operand 24461 states and 94026 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:56,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:56,293 INFO L93 Difference]: Finished difference Result 29417 states and 109341 transitions. [2021-06-05 21:15:56,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 21:15:56,294 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:56,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:56,353 INFO L225 Difference]: With dead ends: 29417 [2021-06-05 21:15:56,354 INFO L226 Difference]: Without dead ends: 29413 [2021-06-05 21:15:56,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 800.6ms TimeCoverageRelationStatistics Valid=804, Invalid=2502, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 21:15:56,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29413 states. [2021-06-05 21:15:56,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29413 to 24515. [2021-06-05 21:15:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24515 states, 24514 states have (on average 3.8458431916455904) internal successors, (94277), 24514 states have internal predecessors, (94277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24515 states to 24515 states and 94277 transitions. [2021-06-05 21:15:56,813 INFO L78 Accepts]: Start accepts. Automaton has 24515 states and 94277 transitions. Word has length 25 [2021-06-05 21:15:56,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:56,813 INFO L482 AbstractCegarLoop]: Abstraction has 24515 states and 94277 transitions. [2021-06-05 21:15:56,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:56,814 INFO L276 IsEmpty]: Start isEmpty. Operand 24515 states and 94277 transitions. [2021-06-05 21:15:56,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:56,849 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:56,850 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:57,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:15:57,053 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:57,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:57,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2122415066, now seen corresponding path program 63 times [2021-06-05 21:15:57,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:57,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213823342] [2021-06-05 21:15:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:15:57,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:57,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213823342] [2021-06-05 21:15:57,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213823342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:57,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395709818] [2021-06-05 21:15:57,084 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 21:15:57,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:15:57,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:57,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:15:57,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:57,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395709818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:57,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:57,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:15:57,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96469000] [2021-06-05 21:15:57,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:15:57,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:57,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:15:57,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:15:57,215 INFO L87 Difference]: Start difference. First operand 24515 states and 94277 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:58,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:15:58,521 INFO L93 Difference]: Finished difference Result 29907 states and 110780 transitions. [2021-06-05 21:15:58,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 21:15:58,521 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:15:58,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:15:58,577 INFO L225 Difference]: With dead ends: 29907 [2021-06-05 21:15:58,577 INFO L226 Difference]: Without dead ends: 29907 [2021-06-05 21:15:58,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 784.3ms TimeCoverageRelationStatistics Valid=793, Invalid=2513, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 21:15:58,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29907 states. [2021-06-05 21:15:58,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29907 to 24470. [2021-06-05 21:15:58,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24470 states, 24469 states have (on average 3.8446605909518166) internal successors, (94075), 24469 states have internal predecessors, (94075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:59,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24470 states to 24470 states and 94075 transitions. [2021-06-05 21:15:59,019 INFO L78 Accepts]: Start accepts. Automaton has 24470 states and 94075 transitions. Word has length 25 [2021-06-05 21:15:59,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:15:59,019 INFO L482 AbstractCegarLoop]: Abstraction has 24470 states and 94075 transitions. [2021-06-05 21:15:59,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:15:59,019 INFO L276 IsEmpty]: Start isEmpty. Operand 24470 states and 94075 transitions. [2021-06-05 21:15:59,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:15:59,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:15:59,054 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:15:59,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-06-05 21:15:59,255 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:15:59,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:15:59,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1344648230, now seen corresponding path program 64 times [2021-06-05 21:15:59,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:15:59,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381122152] [2021-06-05 21:15:59,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:15:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:15:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:59,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:15:59,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381122152] [2021-06-05 21:15:59,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381122152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:59,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772838008] [2021-06-05 21:15:59,286 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 21:15:59,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:15:59,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:15:59,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:15:59,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:15:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:15:59,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772838008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:15:59,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:15:59,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:15:59,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074696621] [2021-06-05 21:15:59,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:15:59,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:15:59,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:15:59,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:15:59,411 INFO L87 Difference]: Start difference. First operand 24470 states and 94075 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:00,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:00,285 INFO L93 Difference]: Finished difference Result 28137 states and 105219 transitions. [2021-06-05 21:16:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 21:16:00,286 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:00,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:00,343 INFO L225 Difference]: With dead ends: 28137 [2021-06-05 21:16:00,343 INFO L226 Difference]: Without dead ends: 28053 [2021-06-05 21:16:00,344 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 531.6ms TimeCoverageRelationStatistics Valid=554, Invalid=1996, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:16:00,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28053 states. [2021-06-05 21:16:00,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28053 to 24568. [2021-06-05 21:16:00,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24568 states, 24567 states have (on average 3.8438962836325152) internal successors, (94433), 24567 states have internal predecessors, (94433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:00,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24568 states to 24568 states and 94433 transitions. [2021-06-05 21:16:00,854 INFO L78 Accepts]: Start accepts. Automaton has 24568 states and 94433 transitions. Word has length 25 [2021-06-05 21:16:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:00,855 INFO L482 AbstractCegarLoop]: Abstraction has 24568 states and 94433 transitions. [2021-06-05 21:16:00,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:00,855 INFO L276 IsEmpty]: Start isEmpty. Operand 24568 states and 94433 transitions. [2021-06-05 21:16:00,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:00,889 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:00,889 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:01,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 21:16:01,089 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:01,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:01,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1878537762, now seen corresponding path program 65 times [2021-06-05 21:16:01,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:01,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140110280] [2021-06-05 21:16:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:01,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:01,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140110280] [2021-06-05 21:16:01,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140110280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:01,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427911953] [2021-06-05 21:16:01,121 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 21:16:01,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:16:01,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:01,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:16:01,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:01,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427911953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:01,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:01,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:16:01,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223795936] [2021-06-05 21:16:01,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:16:01,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:01,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:16:01,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:01,255 INFO L87 Difference]: Start difference. First operand 24568 states and 94433 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:02,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:02,360 INFO L93 Difference]: Finished difference Result 29018 states and 107678 transitions. [2021-06-05 21:16:02,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 21:16:02,360 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:02,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:02,420 INFO L225 Difference]: With dead ends: 29018 [2021-06-05 21:16:02,420 INFO L226 Difference]: Without dead ends: 28983 [2021-06-05 21:16:02,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 684.8ms TimeCoverageRelationStatistics Valid=763, Invalid=2659, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 21:16:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28983 states. [2021-06-05 21:16:02,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28983 to 24726. [2021-06-05 21:16:02,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24726 states, 24725 states have (on average 3.8420222446916075) internal successors, (94994), 24725 states have internal predecessors, (94994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:02,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24726 states to 24726 states and 94994 transitions. [2021-06-05 21:16:02,997 INFO L78 Accepts]: Start accepts. Automaton has 24726 states and 94994 transitions. Word has length 25 [2021-06-05 21:16:02,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:02,997 INFO L482 AbstractCegarLoop]: Abstraction has 24726 states and 94994 transitions. [2021-06-05 21:16:02,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:02,997 INFO L276 IsEmpty]: Start isEmpty. Operand 24726 states and 94994 transitions. [2021-06-05 21:16:03,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:03,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:03,033 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:03,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 21:16:03,234 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:03,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1311834842, now seen corresponding path program 66 times [2021-06-05 21:16:03,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:03,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615261209] [2021-06-05 21:16:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:03,269 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:03,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:03,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615261209] [2021-06-05 21:16:03,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615261209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:03,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052355874] [2021-06-05 21:16:03,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:16:03,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:16:03,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:03,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:16:03,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:03,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052355874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:03,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:03,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:16:03,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232619618] [2021-06-05 21:16:03,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:16:03,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:03,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:16:03,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:03,400 INFO L87 Difference]: Start difference. First operand 24726 states and 94994 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:16:04,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:04,696 INFO L93 Difference]: Finished difference Result 29429 states and 108803 transitions. [2021-06-05 21:16:04,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 21:16:04,697 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-06-05 21:16:04,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:04,756 INFO L225 Difference]: With dead ends: 29429 [2021-06-05 21:16:04,756 INFO L226 Difference]: Without dead ends: 29429 [2021-06-05 21:16:04,756 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1330 ImplicationChecksByTransitivity, 823.2ms TimeCoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 21:16:04,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29429 states. [2021-06-05 21:16:05,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29429 to 24515. [2021-06-05 21:16:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24515 states, 24514 states have (on average 3.8443338500448725) internal successors, (94240), 24514 states have internal predecessors, (94240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:05,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24515 states to 24515 states and 94240 transitions. [2021-06-05 21:16:05,242 INFO L78 Accepts]: Start accepts. Automaton has 24515 states and 94240 transitions. Word has length 25 [2021-06-05 21:16:05,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:05,242 INFO L482 AbstractCegarLoop]: Abstraction has 24515 states and 94240 transitions. [2021-06-05 21:16:05,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:16:05,242 INFO L276 IsEmpty]: Start isEmpty. Operand 24515 states and 94240 transitions. [2021-06-05 21:16:05,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:05,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:05,280 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:05,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 21:16:05,482 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:05,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:05,482 INFO L82 PathProgramCache]: Analyzing trace with hash -118473758, now seen corresponding path program 67 times [2021-06-05 21:16:05,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:05,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99768914] [2021-06-05 21:16:05,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:05,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:05,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99768914] [2021-06-05 21:16:05,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99768914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:05,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881774392] [2021-06-05 21:16:05,515 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 21:16:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:05,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:16:05,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:05,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881774392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:05,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:05,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:16:05,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930206790] [2021-06-05 21:16:05,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:16:05,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:05,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:16:05,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:05,640 INFO L87 Difference]: Start difference. First operand 24515 states and 94240 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:06,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:06,847 INFO L93 Difference]: Finished difference Result 28251 states and 105608 transitions. [2021-06-05 21:16:06,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 21:16:06,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:06,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:06,908 INFO L225 Difference]: With dead ends: 28251 [2021-06-05 21:16:06,909 INFO L226 Difference]: Without dead ends: 28251 [2021-06-05 21:16:06,909 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 783.2ms TimeCoverageRelationStatistics Valid=933, Invalid=2973, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 21:16:06,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28251 states. [2021-06-05 21:16:07,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28251 to 24687. [2021-06-05 21:16:07,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24687 states, 24686 states have (on average 3.8474033865348782) internal successors, (94977), 24686 states have internal predecessors, (94977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24687 states to 24687 states and 94977 transitions. [2021-06-05 21:16:07,498 INFO L78 Accepts]: Start accepts. Automaton has 24687 states and 94977 transitions. Word has length 25 [2021-06-05 21:16:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:07,498 INFO L482 AbstractCegarLoop]: Abstraction has 24687 states and 94977 transitions. [2021-06-05 21:16:07,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:07,498 INFO L276 IsEmpty]: Start isEmpty. Operand 24687 states and 94977 transitions. [2021-06-05 21:16:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:07,536 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:07,536 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:07,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 21:16:07,736 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:07,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:07,737 INFO L82 PathProgramCache]: Analyzing trace with hash -245349406, now seen corresponding path program 68 times [2021-06-05 21:16:07,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:07,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373338477] [2021-06-05 21:16:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:07,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:07,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373338477] [2021-06-05 21:16:07,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373338477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:07,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809652878] [2021-06-05 21:16:07,769 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 21:16:07,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:16:07,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:07,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:16:07,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:07,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809652878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:07,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:07,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:16:07,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189356845] [2021-06-05 21:16:07,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:16:07,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:07,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:16:07,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:07,891 INFO L87 Difference]: Start difference. First operand 24687 states and 94977 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:08,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:08,848 INFO L93 Difference]: Finished difference Result 27902 states and 104651 transitions. [2021-06-05 21:16:08,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 21:16:08,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:08,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:08,905 INFO L225 Difference]: With dead ends: 27902 [2021-06-05 21:16:08,906 INFO L226 Difference]: Without dead ends: 27867 [2021-06-05 21:16:08,906 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 532.8ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:16:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27867 states. [2021-06-05 21:16:09,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27867 to 24681. [2021-06-05 21:16:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24681 states, 24680 states have (on average 3.8464343598055106) internal successors, (94930), 24680 states have internal predecessors, (94930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:09,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24681 states to 24681 states and 94930 transitions. [2021-06-05 21:16:09,393 INFO L78 Accepts]: Start accepts. Automaton has 24681 states and 94930 transitions. Word has length 25 [2021-06-05 21:16:09,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:09,393 INFO L482 AbstractCegarLoop]: Abstraction has 24681 states and 94930 transitions. [2021-06-05 21:16:09,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:09,394 INFO L276 IsEmpty]: Start isEmpty. Operand 24681 states and 94930 transitions. [2021-06-05 21:16:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:09,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:09,430 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:09,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:09,630 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:09,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:09,631 INFO L82 PathProgramCache]: Analyzing trace with hash 540103142, now seen corresponding path program 69 times [2021-06-05 21:16:09,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:09,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594006203] [2021-06-05 21:16:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:09,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:09,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594006203] [2021-06-05 21:16:09,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594006203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:09,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007648187] [2021-06-05 21:16:09,663 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) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:09,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:16:09,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:09,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:16:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:09,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007648187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:09,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:09,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:16:09,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092292407] [2021-06-05 21:16:09,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:16:09,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:09,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:16:09,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:09,788 INFO L87 Difference]: Start difference. First operand 24681 states and 94930 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:11,125 INFO L93 Difference]: Finished difference Result 31956 states and 117413 transitions. [2021-06-05 21:16:11,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 21:16:11,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:11,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:11,189 INFO L225 Difference]: With dead ends: 31956 [2021-06-05 21:16:11,189 INFO L226 Difference]: Without dead ends: 31956 [2021-06-05 21:16:11,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 797.0ms TimeCoverageRelationStatistics Valid=914, Invalid=2868, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 21:16:11,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31956 states. [2021-06-05 21:16:11,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31956 to 24719. [2021-06-05 21:16:11,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24719 states, 24718 states have (on average 3.848329152844081) internal successors, (95123), 24718 states have internal predecessors, (95123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:11,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24719 states to 24719 states and 95123 transitions. [2021-06-05 21:16:11,796 INFO L78 Accepts]: Start accepts. Automaton has 24719 states and 95123 transitions. Word has length 25 [2021-06-05 21:16:11,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:11,796 INFO L482 AbstractCegarLoop]: Abstraction has 24719 states and 95123 transitions. [2021-06-05 21:16:11,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:11,796 INFO L276 IsEmpty]: Start isEmpty. Operand 24719 states and 95123 transitions. [2021-06-05 21:16:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:11,831 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:11,831 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:12,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 21:16:12,031 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:12,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1576784866, now seen corresponding path program 70 times [2021-06-05 21:16:12,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:12,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576475576] [2021-06-05 21:16:12,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:12,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:12,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576475576] [2021-06-05 21:16:12,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576475576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:12,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039005244] [2021-06-05 21:16:12,064 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 21:16:12,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:16:12,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:12,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:16:12,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:12,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039005244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:12,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:12,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:16:12,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836031599] [2021-06-05 21:16:12,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:16:12,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:12,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:16:12,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:12,189 INFO L87 Difference]: Start difference. First operand 24719 states and 95123 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:13,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:13,434 INFO L93 Difference]: Finished difference Result 31907 states and 117451 transitions. [2021-06-05 21:16:13,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 21:16:13,434 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:13,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:13,499 INFO L225 Difference]: With dead ends: 31907 [2021-06-05 21:16:13,499 INFO L226 Difference]: Without dead ends: 31907 [2021-06-05 21:16:13,499 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 734.4ms TimeCoverageRelationStatistics Valid=851, Invalid=2809, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 21:16:13,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31907 states. [2021-06-05 21:16:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31907 to 24705. [2021-06-05 21:16:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24705 states, 24704 states have (on average 3.8469478626943006) internal successors, (95035), 24704 states have internal predecessors, (95035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:14,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24705 states to 24705 states and 95035 transitions. [2021-06-05 21:16:14,028 INFO L78 Accepts]: Start accepts. Automaton has 24705 states and 95035 transitions. Word has length 25 [2021-06-05 21:16:14,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:14,028 INFO L482 AbstractCegarLoop]: Abstraction has 24705 states and 95035 transitions. [2021-06-05 21:16:14,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 24705 states and 95035 transitions. [2021-06-05 21:16:14,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:14,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:14,064 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:14,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 21:16:14,264 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:14,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:14,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1028006882, now seen corresponding path program 71 times [2021-06-05 21:16:14,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:14,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742945570] [2021-06-05 21:16:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:14,296 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:14,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742945570] [2021-06-05 21:16:14,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742945570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:14,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230196171] [2021-06-05 21:16:14,297 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 21:16:14,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:16:14,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:14,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:16:14,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:14,419 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:14,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230196171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:14,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:14,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:16:14,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127332102] [2021-06-05 21:16:14,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:16:14,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:14,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:16:14,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:14,420 INFO L87 Difference]: Start difference. First operand 24705 states and 95035 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:15,334 INFO L93 Difference]: Finished difference Result 27965 states and 104854 transitions. [2021-06-05 21:16:15,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 21:16:15,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:15,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:15,392 INFO L225 Difference]: With dead ends: 27965 [2021-06-05 21:16:15,393 INFO L226 Difference]: Without dead ends: 27930 [2021-06-05 21:16:15,393 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 540.7ms TimeCoverageRelationStatistics Valid=564, Invalid=1986, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:16:15,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27930 states. [2021-06-05 21:16:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27930 to 24732. [2021-06-05 21:16:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24732 states, 24731 states have (on average 3.8465084307144877) internal successors, (95128), 24731 states have internal predecessors, (95128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:15,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24732 states to 24732 states and 95128 transitions. [2021-06-05 21:16:15,999 INFO L78 Accepts]: Start accepts. Automaton has 24732 states and 95128 transitions. Word has length 25 [2021-06-05 21:16:15,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:15,999 INFO L482 AbstractCegarLoop]: Abstraction has 24732 states and 95128 transitions. [2021-06-05 21:16:15,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:15,999 INFO L276 IsEmpty]: Start isEmpty. Operand 24732 states and 95128 transitions. [2021-06-05 21:16:16,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:16,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:16,036 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:16,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:16,236 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:16,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:16,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2132601574, now seen corresponding path program 72 times [2021-06-05 21:16:16,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:16,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507346941] [2021-06-05 21:16:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:16,270 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:16,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:16,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507346941] [2021-06-05 21:16:16,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507346941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:16,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885290546] [2021-06-05 21:16:16,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:16:16,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:16:16,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:16,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:16:16,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:16,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885290546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:16,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:16,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:16:16,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146473256] [2021-06-05 21:16:16,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:16:16,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:16,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:16:16,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:16,392 INFO L87 Difference]: Start difference. First operand 24732 states and 95128 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:16:17,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:17,570 INFO L93 Difference]: Finished difference Result 28264 states and 105755 transitions. [2021-06-05 21:16:17,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 21:16:17,570 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-06-05 21:16:17,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:17,629 INFO L225 Difference]: With dead ends: 28264 [2021-06-05 21:16:17,630 INFO L226 Difference]: Without dead ends: 28264 [2021-06-05 21:16:17,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 752.2ms TimeCoverageRelationStatistics Valid=879, Invalid=2903, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 21:16:17,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28264 states. [2021-06-05 21:16:18,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28264 to 24684. [2021-06-05 21:16:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24684 states, 24683 states have (on average 3.8468581614876634) internal successors, (94952), 24683 states have internal predecessors, (94952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:18,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24684 states to 24684 states and 94952 transitions. [2021-06-05 21:16:18,130 INFO L78 Accepts]: Start accepts. Automaton has 24684 states and 94952 transitions. Word has length 25 [2021-06-05 21:16:18,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:18,130 INFO L482 AbstractCegarLoop]: Abstraction has 24684 states and 94952 transitions. [2021-06-05 21:16:18,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:16:18,131 INFO L276 IsEmpty]: Start isEmpty. Operand 24684 states and 94952 transitions. [2021-06-05 21:16:18,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:18,167 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:18,168 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:18,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:18,373 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:18,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:18,373 INFO L82 PathProgramCache]: Analyzing trace with hash 513844762, now seen corresponding path program 73 times [2021-06-05 21:16:18,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:18,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276279741] [2021-06-05 21:16:18,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:18,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:18,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276279741] [2021-06-05 21:16:18,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276279741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:18,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950877209] [2021-06-05 21:16:18,408 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 21:16:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:18,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:16:18,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:18,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950877209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:18,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:18,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:16:18,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866239721] [2021-06-05 21:16:18,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:16:18,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:18,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:16:18,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:18,540 INFO L87 Difference]: Start difference. First operand 24684 states and 94952 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:19,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:19,096 INFO L93 Difference]: Finished difference Result 25632 states and 97440 transitions. [2021-06-05 21:16:19,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:16:19,097 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:19,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:19,150 INFO L225 Difference]: With dead ends: 25632 [2021-06-05 21:16:19,150 INFO L226 Difference]: Without dead ends: 25593 [2021-06-05 21:16:19,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:16:19,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25593 states. [2021-06-05 21:16:19,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25593 to 24694. [2021-06-05 21:16:19,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24694 states, 24693 states have (on average 3.846677195966468) internal successors, (94986), 24693 states have internal predecessors, (94986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:19,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24694 states to 24694 states and 94986 transitions. [2021-06-05 21:16:19,594 INFO L78 Accepts]: Start accepts. Automaton has 24694 states and 94986 transitions. Word has length 25 [2021-06-05 21:16:19,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:19,594 INFO L482 AbstractCegarLoop]: Abstraction has 24694 states and 94986 transitions. [2021-06-05 21:16:19,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:19,594 INFO L276 IsEmpty]: Start isEmpty. Operand 24694 states and 94986 transitions. [2021-06-05 21:16:19,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:19,629 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:19,630 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:19,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:19,830 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:19,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1943083934, now seen corresponding path program 74 times [2021-06-05 21:16:19,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:19,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297436025] [2021-06-05 21:16:19,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:19,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:19,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297436025] [2021-06-05 21:16:19,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297436025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:19,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600806916] [2021-06-05 21:16:19,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:16:19,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:16:19,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:19,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:16:19,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:19,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600806916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:19,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:19,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:16:19,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176332935] [2021-06-05 21:16:19,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:16:19,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:19,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:16:19,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:19,992 INFO L87 Difference]: Start difference. First operand 24694 states and 94986 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:20,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:20,760 INFO L93 Difference]: Finished difference Result 25462 states and 96999 transitions. [2021-06-05 21:16:20,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:16:20,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:20,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:20,822 INFO L225 Difference]: With dead ends: 25462 [2021-06-05 21:16:20,822 INFO L226 Difference]: Without dead ends: 25441 [2021-06-05 21:16:20,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 468.2ms TimeCoverageRelationStatistics Valid=347, Invalid=1213, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:16:20,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25441 states. [2021-06-05 21:16:21,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25441 to 24694. [2021-06-05 21:16:21,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24694 states, 24693 states have (on average 3.8464342121248936) internal successors, (94980), 24693 states have internal predecessors, (94980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:21,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24694 states to 24694 states and 94980 transitions. [2021-06-05 21:16:21,345 INFO L78 Accepts]: Start accepts. Automaton has 24694 states and 94980 transitions. Word has length 25 [2021-06-05 21:16:21,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:21,345 INFO L482 AbstractCegarLoop]: Abstraction has 24694 states and 94980 transitions. [2021-06-05 21:16:21,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:21,345 INFO L276 IsEmpty]: Start isEmpty. Operand 24694 states and 94980 transitions. [2021-06-05 21:16:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:21,380 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:21,380 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:21,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:21,580 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:21,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:21,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1021296226, now seen corresponding path program 75 times [2021-06-05 21:16:21,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:21,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702346689] [2021-06-05 21:16:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:21,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:21,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702346689] [2021-06-05 21:16:21,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702346689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:21,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925508292] [2021-06-05 21:16:21,617 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 21:16:21,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:16:21,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:21,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:16:21,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:21,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925508292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:21,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:21,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:16:21,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268784735] [2021-06-05 21:16:21,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:16:21,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:21,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:16:21,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:21,747 INFO L87 Difference]: Start difference. First operand 24694 states and 94980 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:22,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:22,524 INFO L93 Difference]: Finished difference Result 25395 states and 96836 transitions. [2021-06-05 21:16:22,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:16:22,525 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:22,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:22,584 INFO L225 Difference]: With dead ends: 25395 [2021-06-05 21:16:22,584 INFO L226 Difference]: Without dead ends: 25388 [2021-06-05 21:16:22,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 548.6ms TimeCoverageRelationStatistics Valid=451, Invalid=1441, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:16:22,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25388 states. [2021-06-05 21:16:22,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25388 to 24694. [2021-06-05 21:16:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24694 states, 24693 states have (on average 3.8463127202041063) internal successors, (94977), 24693 states have internal predecessors, (94977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:23,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24694 states to 24694 states and 94977 transitions. [2021-06-05 21:16:23,030 INFO L78 Accepts]: Start accepts. Automaton has 24694 states and 94977 transitions. Word has length 25 [2021-06-05 21:16:23,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:23,030 INFO L482 AbstractCegarLoop]: Abstraction has 24694 states and 94977 transitions. [2021-06-05 21:16:23,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:23,031 INFO L276 IsEmpty]: Start isEmpty. Operand 24694 states and 94977 transitions. [2021-06-05 21:16:23,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:23,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:23,065 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:23,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 21:16:23,265 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:23,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:23,266 INFO L82 PathProgramCache]: Analyzing trace with hash 2125890918, now seen corresponding path program 76 times [2021-06-05 21:16:23,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:23,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386724869] [2021-06-05 21:16:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:23,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:23,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386724869] [2021-06-05 21:16:23,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386724869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:23,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245136763] [2021-06-05 21:16:23,302 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 21:16:23,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:16:23,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:23,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:16:23,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:23,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245136763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:23,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:23,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:16:23,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85764191] [2021-06-05 21:16:23,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:16:23,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:23,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:16:23,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:23,440 INFO L87 Difference]: Start difference. First operand 24694 states and 94977 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:16:24,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:24,285 INFO L93 Difference]: Finished difference Result 25484 states and 97099 transitions. [2021-06-05 21:16:24,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:16:24,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-06-05 21:16:24,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:24,338 INFO L225 Difference]: With dead ends: 25484 [2021-06-05 21:16:24,338 INFO L226 Difference]: Without dead ends: 25484 [2021-06-05 21:16:24,338 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 619.8ms TimeCoverageRelationStatistics Valid=527, Invalid=1635, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:16:24,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25484 states. [2021-06-05 21:16:24,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25484 to 24676. [2021-06-05 21:16:24,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24676 states, 24675 states have (on average 3.846565349544073) internal successors, (94914), 24675 states have internal predecessors, (94914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:24,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24676 states to 24676 states and 94914 transitions. [2021-06-05 21:16:24,785 INFO L78 Accepts]: Start accepts. Automaton has 24676 states and 94914 transitions. Word has length 25 [2021-06-05 21:16:24,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:24,785 INFO L482 AbstractCegarLoop]: Abstraction has 24676 states and 94914 transitions. [2021-06-05 21:16:24,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:16:24,786 INFO L276 IsEmpty]: Start isEmpty. Operand 24676 states and 94914 transitions. [2021-06-05 21:16:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:24,822 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:24,822 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:25,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 21:16:25,022 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:25,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:25,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1782522160, now seen corresponding path program 47 times [2021-06-05 21:16:25,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:25,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855461783] [2021-06-05 21:16:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:25,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:25,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855461783] [2021-06-05 21:16:25,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855461783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:25,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269395084] [2021-06-05 21:16:25,047 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 21:16:25,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:16:25,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:25,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:16:25,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:25,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269395084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:25,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:25,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 21:16:25,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295233934] [2021-06-05 21:16:25,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:16:25,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:25,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:16:25,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:16:25,140 INFO L87 Difference]: Start difference. First operand 24676 states and 94914 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:25,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:25,585 INFO L93 Difference]: Finished difference Result 35078 states and 126526 transitions. [2021-06-05 21:16:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:16:25,585 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:25,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:25,655 INFO L225 Difference]: With dead ends: 35078 [2021-06-05 21:16:25,655 INFO L226 Difference]: Without dead ends: 35071 [2021-06-05 21:16:25,656 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:16:25,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35071 states. [2021-06-05 21:16:26,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35071 to 24193. [2021-06-05 21:16:26,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24193 states, 24192 states have (on average 3.8466848544973544) internal successors, (93059), 24192 states have internal predecessors, (93059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24193 states to 24193 states and 93059 transitions. [2021-06-05 21:16:26,193 INFO L78 Accepts]: Start accepts. Automaton has 24193 states and 93059 transitions. Word has length 25 [2021-06-05 21:16:26,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:26,193 INFO L482 AbstractCegarLoop]: Abstraction has 24193 states and 93059 transitions. [2021-06-05 21:16:26,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 24193 states and 93059 transitions. [2021-06-05 21:16:26,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:26,230 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:26,230 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:26,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 21:16:26,431 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1609809744, now seen corresponding path program 77 times [2021-06-05 21:16:26,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:26,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083547744] [2021-06-05 21:16:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:26,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:26,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083547744] [2021-06-05 21:16:26,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083547744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:26,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247803023] [2021-06-05 21:16:26,465 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 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 21:16:26,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:16:26,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:26,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:16:26,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:26,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247803023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:26,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:26,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:16:26,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358240184] [2021-06-05 21:16:26,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:16:26,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:26,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:16:26,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:16:26,578 INFO L87 Difference]: Start difference. First operand 24193 states and 93059 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:16:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:28,200 INFO L93 Difference]: Finished difference Result 52705 states and 193549 transitions. [2021-06-05 21:16:28,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 21:16:28,200 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 25 [2021-06-05 21:16:28,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:28,327 INFO L225 Difference]: With dead ends: 52705 [2021-06-05 21:16:28,327 INFO L226 Difference]: Without dead ends: 52653 [2021-06-05 21:16:28,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 1028.0ms TimeCoverageRelationStatistics Valid=1425, Invalid=5055, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 21:16:28,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52653 states. [2021-06-05 21:16:28,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52653 to 27845. [2021-06-05 21:16:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27845 states, 27844 states have (on average 3.8819135181726763) internal successors, (108088), 27844 states have internal predecessors, (108088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27845 states to 27845 states and 108088 transitions. [2021-06-05 21:16:29,094 INFO L78 Accepts]: Start accepts. Automaton has 27845 states and 108088 transitions. Word has length 25 [2021-06-05 21:16:29,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:29,094 INFO L482 AbstractCegarLoop]: Abstraction has 27845 states and 108088 transitions. [2021-06-05 21:16:29,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:16:29,094 INFO L276 IsEmpty]: Start isEmpty. Operand 27845 states and 108088 transitions. [2021-06-05 21:16:29,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:29,139 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:29,139 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:29,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 21:16:29,340 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:29,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:29,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1706600108, now seen corresponding path program 78 times [2021-06-05 21:16:29,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:29,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549029234] [2021-06-05 21:16:29,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:29,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:29,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549029234] [2021-06-05 21:16:29,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549029234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:29,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843990183] [2021-06-05 21:16:29,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:16:29,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:16:29,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:16:29,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:29,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843990183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:29,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:29,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:16:29,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519757079] [2021-06-05 21:16:29,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:16:29,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:29,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:16:29,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:16:29,482 INFO L87 Difference]: Start difference. First operand 27845 states and 108088 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:31,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:31,077 INFO L93 Difference]: Finished difference Result 60991 states and 221222 transitions. [2021-06-05 21:16:31,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 21:16:31,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:31,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:31,222 INFO L225 Difference]: With dead ends: 60991 [2021-06-05 21:16:31,222 INFO L226 Difference]: Without dead ends: 60949 [2021-06-05 21:16:31,222 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 985.9ms TimeCoverageRelationStatistics Valid=1103, Invalid=3727, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 21:16:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60949 states. [2021-06-05 21:16:31,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60949 to 26506. [2021-06-05 21:16:31,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26506 states, 26505 states have (on average 3.861950575363139) internal successors, (102361), 26505 states have internal predecessors, (102361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:32,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26506 states to 26506 states and 102361 transitions. [2021-06-05 21:16:32,021 INFO L78 Accepts]: Start accepts. Automaton has 26506 states and 102361 transitions. Word has length 25 [2021-06-05 21:16:32,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:32,021 INFO L482 AbstractCegarLoop]: Abstraction has 26506 states and 102361 transitions. [2021-06-05 21:16:32,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand 26506 states and 102361 transitions. [2021-06-05 21:16:32,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:32,064 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:32,065 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:32,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-06-05 21:16:32,265 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:32,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:32,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1176199720, now seen corresponding path program 79 times [2021-06-05 21:16:32,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:32,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949733310] [2021-06-05 21:16:32,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:32,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:32,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949733310] [2021-06-05 21:16:32,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949733310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:32,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287761579] [2021-06-05 21:16:32,297 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 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 21:16:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:32,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:16:32,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:32,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287761579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:32,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:32,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:16:32,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482051050] [2021-06-05 21:16:32,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:16:32,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:32,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:16:32,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:16:32,414 INFO L87 Difference]: Start difference. First operand 26506 states and 102361 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:33,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:33,720 INFO L93 Difference]: Finished difference Result 52440 states and 190195 transitions. [2021-06-05 21:16:33,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 21:16:33,720 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:33,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:33,846 INFO L225 Difference]: With dead ends: 52440 [2021-06-05 21:16:33,846 INFO L226 Difference]: Without dead ends: 52412 [2021-06-05 21:16:33,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 789.7ms TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 21:16:33,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52412 states. [2021-06-05 21:16:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52412 to 29320. [2021-06-05 21:16:34,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29320 states, 29319 states have (on average 3.863637913980695) internal successors, (113278), 29319 states have internal predecessors, (113278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:34,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29320 states to 29320 states and 113278 transitions. [2021-06-05 21:16:34,585 INFO L78 Accepts]: Start accepts. Automaton has 29320 states and 113278 transitions. Word has length 25 [2021-06-05 21:16:34,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:34,585 INFO L482 AbstractCegarLoop]: Abstraction has 29320 states and 113278 transitions. [2021-06-05 21:16:34,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:34,585 INFO L276 IsEmpty]: Start isEmpty. Operand 29320 states and 113278 transitions. [2021-06-05 21:16:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:34,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:34,632 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:34,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 21:16:34,833 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:34,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:34,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1107955728, now seen corresponding path program 80 times [2021-06-05 21:16:34,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:34,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741986373] [2021-06-05 21:16:34,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:34,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:34,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741986373] [2021-06-05 21:16:34,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741986373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:34,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512438670] [2021-06-05 21:16:34,862 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 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 21:16:34,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:16:34,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:34,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:16:34,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:34,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512438670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:34,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:34,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:16:34,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008056432] [2021-06-05 21:16:34,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:16:34,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:34,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:16:34,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:16:34,971 INFO L87 Difference]: Start difference. First operand 29320 states and 113278 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:36,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:36,507 INFO L93 Difference]: Finished difference Result 67617 states and 247482 transitions. [2021-06-05 21:16:36,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 21:16:36,507 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:36,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:36,675 INFO L225 Difference]: With dead ends: 67617 [2021-06-05 21:16:36,675 INFO L226 Difference]: Without dead ends: 67589 [2021-06-05 21:16:36,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 853.1ms TimeCoverageRelationStatistics Valid=961, Invalid=3199, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 21:16:36,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67589 states. [2021-06-05 21:16:37,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67589 to 35399. [2021-06-05 21:16:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35399 states, 35398 states have (on average 3.8848240013560087) internal successors, (137515), 35398 states have internal predecessors, (137515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:37,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35399 states to 35399 states and 137515 transitions. [2021-06-05 21:16:37,651 INFO L78 Accepts]: Start accepts. Automaton has 35399 states and 137515 transitions. Word has length 25 [2021-06-05 21:16:37,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:37,651 INFO L482 AbstractCegarLoop]: Abstraction has 35399 states and 137515 transitions. [2021-06-05 21:16:37,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:37,651 INFO L276 IsEmpty]: Start isEmpty. Operand 35399 states and 137515 transitions. [2021-06-05 21:16:37,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:37,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:37,707 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:37,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:37,909 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:37,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:37,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1067069608, now seen corresponding path program 81 times [2021-06-05 21:16:37,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:37,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962354583] [2021-06-05 21:16:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:37,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:37,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962354583] [2021-06-05 21:16:37,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962354583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:37,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132819526] [2021-06-05 21:16:37,938 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 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 21:16:37,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:16:37,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:37,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:16:37,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:38,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132819526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:38,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:38,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:16:38,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351804462] [2021-06-05 21:16:38,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:16:38,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:38,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:16:38,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:16:38,052 INFO L87 Difference]: Start difference. First operand 35399 states and 137515 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:39,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:39,242 INFO L93 Difference]: Finished difference Result 56637 states and 210055 transitions. [2021-06-05 21:16:39,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 21:16:39,242 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:39,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:39,380 INFO L225 Difference]: With dead ends: 56637 [2021-06-05 21:16:39,380 INFO L226 Difference]: Without dead ends: 56585 [2021-06-05 21:16:39,381 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 683.4ms TimeCoverageRelationStatistics Valid=733, Invalid=2689, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 21:16:39,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56585 states. [2021-06-05 21:16:40,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56585 to 30974. [2021-06-05 21:16:40,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30974 states, 30973 states have (on average 3.867174635973267) internal successors, (119778), 30973 states have internal predecessors, (119778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:40,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30974 states to 30974 states and 119778 transitions. [2021-06-05 21:16:40,449 INFO L78 Accepts]: Start accepts. Automaton has 30974 states and 119778 transitions. Word has length 25 [2021-06-05 21:16:40,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:40,450 INFO L482 AbstractCegarLoop]: Abstraction has 30974 states and 119778 transitions. [2021-06-05 21:16:40,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:40,450 INFO L276 IsEmpty]: Start isEmpty. Operand 30974 states and 119778 transitions. [2021-06-05 21:16:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:40,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:40,499 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:40,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:40,699 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:40,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:40,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1897971604, now seen corresponding path program 48 times [2021-06-05 21:16:40,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:40,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199331873] [2021-06-05 21:16:40,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:40,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:40,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199331873] [2021-06-05 21:16:40,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199331873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:40,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810490738] [2021-06-05 21:16:40,722 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:16:40,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:16:40,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:40,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:16:40,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:40,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810490738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:40,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:40,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:16:40,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104748496] [2021-06-05 21:16:40,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:16:40,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:40,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:16:40,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:16:40,817 INFO L87 Difference]: Start difference. First operand 30974 states and 119778 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:41,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:41,185 INFO L93 Difference]: Finished difference Result 51705 states and 192092 transitions. [2021-06-05 21:16:41,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:16:41,186 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:41,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:41,309 INFO L225 Difference]: With dead ends: 51705 [2021-06-05 21:16:41,309 INFO L226 Difference]: Without dead ends: 51705 [2021-06-05 21:16:41,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:16:41,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51705 states. [2021-06-05 21:16:42,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51705 to 39709. [2021-06-05 21:16:42,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39709 states, 39708 states have (on average 3.9065679460058425) internal successors, (155122), 39708 states have internal predecessors, (155122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:42,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39709 states to 39709 states and 155122 transitions. [2021-06-05 21:16:42,246 INFO L78 Accepts]: Start accepts. Automaton has 39709 states and 155122 transitions. Word has length 25 [2021-06-05 21:16:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:42,246 INFO L482 AbstractCegarLoop]: Abstraction has 39709 states and 155122 transitions. [2021-06-05 21:16:42,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 39709 states and 155122 transitions. [2021-06-05 21:16:42,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:42,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:42,308 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:42,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:42,508 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:42,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:42,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1363443692, now seen corresponding path program 82 times [2021-06-05 21:16:42,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:42,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128318965] [2021-06-05 21:16:42,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:42,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:42,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128318965] [2021-06-05 21:16:42,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128318965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:42,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206368408] [2021-06-05 21:16:42,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:42,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:16:42,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:42,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:16:42,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:42,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206368408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:42,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:42,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:16:42,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402745279] [2021-06-05 21:16:42,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:16:42,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:42,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:16:42,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:16:42,899 INFO L87 Difference]: Start difference. First operand 39709 states and 155122 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:16:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:44,271 INFO L93 Difference]: Finished difference Result 66388 states and 248949 transitions. [2021-06-05 21:16:44,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 21:16:44,271 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 25 [2021-06-05 21:16:44,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:44,433 INFO L225 Difference]: With dead ends: 66388 [2021-06-05 21:16:44,433 INFO L226 Difference]: Without dead ends: 66372 [2021-06-05 21:16:44,434 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 880.1ms TimeCoverageRelationStatistics Valid=844, Invalid=2816, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 21:16:44,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66372 states. [2021-06-05 21:16:45,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66372 to 41635. [2021-06-05 21:16:45,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41635 states, 41634 states have (on average 3.926910697987222) internal successors, (163493), 41634 states have internal predecessors, (163493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41635 states to 41635 states and 163493 transitions. [2021-06-05 21:16:45,618 INFO L78 Accepts]: Start accepts. Automaton has 41635 states and 163493 transitions. Word has length 25 [2021-06-05 21:16:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:45,618 INFO L482 AbstractCegarLoop]: Abstraction has 41635 states and 163493 transitions. [2021-06-05 21:16:45,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:16:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 41635 states and 163493 transitions. [2021-06-05 21:16:45,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:45,683 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:45,683 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:45,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:45,883 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:45,883 INFO L82 PathProgramCache]: Analyzing trace with hash -384886248, now seen corresponding path program 83 times [2021-06-05 21:16:45,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:45,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154321932] [2021-06-05 21:16:45,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:45,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:45,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:45,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154321932] [2021-06-05 21:16:45,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154321932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:45,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464153579] [2021-06-05 21:16:45,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:45,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:16:45,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:45,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:16:45,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:46,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464153579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:46,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:46,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:16:46,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829360875] [2021-06-05 21:16:46,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:16:46,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:46,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:16:46,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:16:46,026 INFO L87 Difference]: Start difference. First operand 41635 states and 163493 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:47,386 INFO L93 Difference]: Finished difference Result 72325 states and 269834 transitions. [2021-06-05 21:16:47,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 21:16:47,386 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:47,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:47,667 INFO L225 Difference]: With dead ends: 72325 [2021-06-05 21:16:47,667 INFO L226 Difference]: Without dead ends: 72325 [2021-06-05 21:16:47,667 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 603.2ms TimeCoverageRelationStatistics Valid=619, Invalid=1931, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:16:47,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72325 states. [2021-06-05 21:16:48,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72325 to 41575. [2021-06-05 21:16:48,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41575 states, 41574 states have (on average 3.9234617789964883) internal successors, (163114), 41574 states have internal predecessors, (163114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:48,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41575 states to 41575 states and 163114 transitions. [2021-06-05 21:16:48,912 INFO L78 Accepts]: Start accepts. Automaton has 41575 states and 163114 transitions. Word has length 25 [2021-06-05 21:16:48,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:48,912 INFO L482 AbstractCegarLoop]: Abstraction has 41575 states and 163114 transitions. [2021-06-05 21:16:48,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:48,912 INFO L276 IsEmpty]: Start isEmpty. Operand 41575 states and 163114 transitions. [2021-06-05 21:16:49,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:49,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:49,177 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:49,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:16:49,378 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:49,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:49,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1911191588, now seen corresponding path program 49 times [2021-06-05 21:16:49,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:49,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570650240] [2021-06-05 21:16:49,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:49,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:49,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570650240] [2021-06-05 21:16:49,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570650240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:49,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49884449] [2021-06-05 21:16:49,398 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 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 21:16:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:49,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:16:49,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:49,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49884449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:49,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:49,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 21:16:49,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213857745] [2021-06-05 21:16:49,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:16:49,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:49,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:16:49,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:16:49,478 INFO L87 Difference]: Start difference. First operand 41575 states and 163114 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 21:16:49,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:49,936 INFO L93 Difference]: Finished difference Result 49782 states and 187824 transitions. [2021-06-05 21:16:49,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:16:49,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 25 [2021-06-05 21:16:49,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:50,058 INFO L225 Difference]: With dead ends: 49782 [2021-06-05 21:16:50,058 INFO L226 Difference]: Without dead ends: 49774 [2021-06-05 21:16:50,059 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:16:50,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49774 states. [2021-06-05 21:16:51,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49774 to 41562. [2021-06-05 21:16:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41562 states, 41561 states have (on average 3.9228122518707442) internal successors, (163036), 41561 states have internal predecessors, (163036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:51,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41562 states to 41562 states and 163036 transitions. [2021-06-05 21:16:51,192 INFO L78 Accepts]: Start accepts. Automaton has 41562 states and 163036 transitions. Word has length 25 [2021-06-05 21:16:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:51,193 INFO L482 AbstractCegarLoop]: Abstraction has 41562 states and 163036 transitions. [2021-06-05 21:16:51,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 21:16:51,193 INFO L276 IsEmpty]: Start isEmpty. Operand 41562 states and 163036 transitions. [2021-06-05 21:16:51,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:51,443 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:51,443 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:51,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 21:16:51,643 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:51,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:51,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1231072, now seen corresponding path program 50 times [2021-06-05 21:16:51,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:51,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23715865] [2021-06-05 21:16:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:51,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:51,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23715865] [2021-06-05 21:16:51,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23715865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:51,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442086897] [2021-06-05 21:16:51,687 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 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 21:16:51,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:16:51,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:51,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:16:51,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:51,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442086897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:51,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:51,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:16:51,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838232149] [2021-06-05 21:16:51,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:16:51,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:51,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:16:51,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:51,813 INFO L87 Difference]: Start difference. First operand 41562 states and 163036 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:52,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:52,698 INFO L93 Difference]: Finished difference Result 46635 states and 178550 transitions. [2021-06-05 21:16:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:16:52,698 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:52,800 INFO L225 Difference]: With dead ends: 46635 [2021-06-05 21:16:52,800 INFO L226 Difference]: Without dead ends: 46635 [2021-06-05 21:16:52,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 357.5ms TimeCoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:16:52,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46635 states. [2021-06-05 21:16:53,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46635 to 41520. [2021-06-05 21:16:53,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41520 states, 41519 states have (on average 3.922902767407693) internal successors, (162875), 41519 states have internal predecessors, (162875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41520 states to 41520 states and 162875 transitions. [2021-06-05 21:16:53,803 INFO L78 Accepts]: Start accepts. Automaton has 41520 states and 162875 transitions. Word has length 25 [2021-06-05 21:16:53,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:53,803 INFO L482 AbstractCegarLoop]: Abstraction has 41520 states and 162875 transitions. [2021-06-05 21:16:53,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:53,804 INFO L276 IsEmpty]: Start isEmpty. Operand 41520 states and 162875 transitions. [2021-06-05 21:16:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:53,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:53,884 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:54,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 21:16:54,084 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:54,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1747308854, now seen corresponding path program 51 times [2021-06-05 21:16:54,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:54,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747495129] [2021-06-05 21:16:54,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:54,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:54,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747495129] [2021-06-05 21:16:54,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747495129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:54,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234408657] [2021-06-05 21:16:54,110 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 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 21:16:54,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:16:54,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:16:54,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:16:54,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234408657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:54,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:54,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 21:16:54,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370627996] [2021-06-05 21:16:54,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:16:54,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:54,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:16:54,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:16:54,187 INFO L87 Difference]: Start difference. First operand 41520 states and 162875 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 21:16:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:54,555 INFO L93 Difference]: Finished difference Result 48249 states and 183115 transitions. [2021-06-05 21:16:54,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:16:54,555 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 25 [2021-06-05 21:16:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:54,882 INFO L225 Difference]: With dead ends: 48249 [2021-06-05 21:16:54,882 INFO L226 Difference]: Without dead ends: 48227 [2021-06-05 21:16:54,882 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:16:54,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48227 states. [2021-06-05 21:16:55,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48227 to 41508. [2021-06-05 21:16:55,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41508 states, 41507 states have (on average 3.9222299853036837) internal successors, (162800), 41507 states have internal predecessors, (162800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:55,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41508 states to 41508 states and 162800 transitions. [2021-06-05 21:16:55,775 INFO L78 Accepts]: Start accepts. Automaton has 41508 states and 162800 transitions. Word has length 25 [2021-06-05 21:16:55,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:55,775 INFO L482 AbstractCegarLoop]: Abstraction has 41508 states and 162800 transitions. [2021-06-05 21:16:55,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 21:16:55,775 INFO L276 IsEmpty]: Start isEmpty. Operand 41508 states and 162800 transitions. [2021-06-05 21:16:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:55,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:55,841 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:56,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 21:16:56,041 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:56,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:56,042 INFO L82 PathProgramCache]: Analyzing trace with hash -772027368, now seen corresponding path program 52 times [2021-06-05 21:16:56,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:56,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552374470] [2021-06-05 21:16:56,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:56,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:56,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:56,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552374470] [2021-06-05 21:16:56,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552374470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:56,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994951319] [2021-06-05 21:16:56,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:16:56,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:16:56,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:56,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:16:56,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:56,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994951319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:56,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:56,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:16:56,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961788776] [2021-06-05 21:16:56,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:16:56,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:56,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:16:56,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:56,201 INFO L87 Difference]: Start difference. First operand 41508 states and 162800 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:57,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:57,022 INFO L93 Difference]: Finished difference Result 42773 states and 166354 transitions. [2021-06-05 21:16:57,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:16:57,022 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:16:57,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:57,122 INFO L225 Difference]: With dead ends: 42773 [2021-06-05 21:16:57,122 INFO L226 Difference]: Without dead ends: 42759 [2021-06-05 21:16:57,122 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 522.7ms TimeCoverageRelationStatistics Valid=337, Invalid=1303, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:16:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42759 states. [2021-06-05 21:16:57,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42759 to 41954. [2021-06-05 21:16:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41954 states, 41953 states have (on average 3.9150477915762876) internal successors, (164248), 41953 states have internal predecessors, (164248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:58,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41954 states to 41954 states and 164248 transitions. [2021-06-05 21:16:58,350 INFO L78 Accepts]: Start accepts. Automaton has 41954 states and 164248 transitions. Word has length 25 [2021-06-05 21:16:58,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:16:58,350 INFO L482 AbstractCegarLoop]: Abstraction has 41954 states and 164248 transitions. [2021-06-05 21:16:58,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:16:58,350 INFO L276 IsEmpty]: Start isEmpty. Operand 41954 states and 164248 transitions. [2021-06-05 21:16:58,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:16:58,417 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:16:58,417 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:16:58,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 21:16:58,618 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:16:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:16:58,618 INFO L82 PathProgramCache]: Analyzing trace with hash 332567324, now seen corresponding path program 53 times [2021-06-05 21:16:58,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:16:58,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066276771] [2021-06-05 21:16:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:16:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:16:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:58,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:16:58,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066276771] [2021-06-05 21:16:58,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066276771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:58,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993714086] [2021-06-05 21:16:58,655 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 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 21:16:58,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:16:58,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:16:58,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:16:58,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:16:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:16:58,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993714086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:16:58,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:16:58,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:16:58,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476633341] [2021-06-05 21:16:58,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:16:58,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:16:58,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:16:58,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:16:58,781 INFO L87 Difference]: Start difference. First operand 41954 states and 164248 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:16:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:16:59,609 INFO L93 Difference]: Finished difference Result 43033 states and 167158 transitions. [2021-06-05 21:16:59,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 21:16:59,610 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-06-05 21:16:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:16:59,884 INFO L225 Difference]: With dead ends: 43033 [2021-06-05 21:16:59,885 INFO L226 Difference]: Without dead ends: 43027 [2021-06-05 21:16:59,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 427.8ms TimeCoverageRelationStatistics Valid=472, Invalid=1784, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 21:16:59,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43027 states. [2021-06-05 21:17:00,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43027 to 41948. [2021-06-05 21:17:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41948 states, 41947 states have (on average 3.914940281784156) internal successors, (164220), 41947 states have internal predecessors, (164220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:00,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41948 states to 41948 states and 164220 transitions. [2021-06-05 21:17:00,709 INFO L78 Accepts]: Start accepts. Automaton has 41948 states and 164220 transitions. Word has length 25 [2021-06-05 21:17:00,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:00,709 INFO L482 AbstractCegarLoop]: Abstraction has 41948 states and 164220 transitions. [2021-06-05 21:17:00,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:17:00,709 INFO L276 IsEmpty]: Start isEmpty. Operand 41948 states and 164220 transitions. [2021-06-05 21:17:00,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:00,774 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:00,774 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:00,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:00,975 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:00,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:00,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1637832284, now seen corresponding path program 84 times [2021-06-05 21:17:00,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:00,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101150138] [2021-06-05 21:17:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:01,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:01,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:01,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101150138] [2021-06-05 21:17:01,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101150138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:01,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897282014] [2021-06-05 21:17:01,013 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 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 21:17:01,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:17:01,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:01,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:01,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:01,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897282014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:01,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:01,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:17:01,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020416315] [2021-06-05 21:17:01,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:17:01,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:01,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:17:01,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:01,130 INFO L87 Difference]: Start difference. First operand 41948 states and 164220 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:17:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:02,469 INFO L93 Difference]: Finished difference Result 59787 states and 225390 transitions. [2021-06-05 21:17:02,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 21:17:02,469 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 25 [2021-06-05 21:17:02,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:02,628 INFO L225 Difference]: With dead ends: 59787 [2021-06-05 21:17:02,629 INFO L226 Difference]: Without dead ends: 59763 [2021-06-05 21:17:02,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 674.1ms TimeCoverageRelationStatistics Valid=674, Invalid=2296, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 21:17:02,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59763 states. [2021-06-05 21:17:03,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59763 to 41978. [2021-06-05 21:17:03,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41978 states, 41977 states have (on average 3.9149296043071207) internal successors, (164337), 41977 states have internal predecessors, (164337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41978 states to 41978 states and 164337 transitions. [2021-06-05 21:17:03,768 INFO L78 Accepts]: Start accepts. Automaton has 41978 states and 164337 transitions. Word has length 25 [2021-06-05 21:17:03,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:03,769 INFO L482 AbstractCegarLoop]: Abstraction has 41978 states and 164337 transitions. [2021-06-05 21:17:03,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:17:03,769 INFO L276 IsEmpty]: Start isEmpty. Operand 41978 states and 164337 transitions. [2021-06-05 21:17:04,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:04,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:04,042 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:04,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:04,243 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:04,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:04,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1355957028, now seen corresponding path program 85 times [2021-06-05 21:17:04,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:04,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305285177] [2021-06-05 21:17:04,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:04,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:04,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305285177] [2021-06-05 21:17:04,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305285177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:04,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448341815] [2021-06-05 21:17:04,293 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 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 21:17:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:04,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:04,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:04,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448341815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:04,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:04,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:17:04,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302034210] [2021-06-05 21:17:04,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:17:04,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:04,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:17:04,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:04,404 INFO L87 Difference]: Start difference. First operand 41978 states and 164337 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:05,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:05,414 INFO L93 Difference]: Finished difference Result 58211 states and 220785 transitions. [2021-06-05 21:17:05,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 21:17:05,415 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:17:05,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:05,566 INFO L225 Difference]: With dead ends: 58211 [2021-06-05 21:17:05,566 INFO L226 Difference]: Without dead ends: 58187 [2021-06-05 21:17:05,567 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 520.2ms TimeCoverageRelationStatistics Valid=464, Invalid=1516, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 21:17:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58187 states. [2021-06-05 21:17:06,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58187 to 41944. [2021-06-05 21:17:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41944 states, 41943 states have (on average 3.9150513792527954) internal successors, (164209), 41943 states have internal predecessors, (164209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:06,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41944 states to 41944 states and 164209 transitions. [2021-06-05 21:17:06,763 INFO L78 Accepts]: Start accepts. Automaton has 41944 states and 164209 transitions. Word has length 25 [2021-06-05 21:17:06,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:06,763 INFO L482 AbstractCegarLoop]: Abstraction has 41944 states and 164209 transitions. [2021-06-05 21:17:06,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:06,763 INFO L276 IsEmpty]: Start isEmpty. Operand 41944 states and 164209 transitions. [2021-06-05 21:17:06,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:06,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:06,835 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:07,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 21:17:07,036 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:07,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:07,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1354335008, now seen corresponding path program 86 times [2021-06-05 21:17:07,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:07,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210569866] [2021-06-05 21:17:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:07,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:07,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210569866] [2021-06-05 21:17:07,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210569866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:07,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241679576] [2021-06-05 21:17:07,070 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 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 21:17:07,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:07,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:07,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:07,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:07,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241679576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:07,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:07,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:17:07,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547088881] [2021-06-05 21:17:07,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:17:07,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:07,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:17:07,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:07,193 INFO L87 Difference]: Start difference. First operand 41944 states and 164209 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:08,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:08,515 INFO L93 Difference]: Finished difference Result 74727 states and 277787 transitions. [2021-06-05 21:17:08,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 21:17:08,516 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:17:08,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:08,704 INFO L225 Difference]: With dead ends: 74727 [2021-06-05 21:17:08,704 INFO L226 Difference]: Without dead ends: 74727 [2021-06-05 21:17:08,704 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 625.4ms TimeCoverageRelationStatistics Valid=598, Invalid=1852, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 21:17:08,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74727 states. [2021-06-05 21:17:09,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74727 to 41961. [2021-06-05 21:17:09,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41961 states, 41960 states have (on average 3.915610104861773) internal successors, (164299), 41960 states have internal predecessors, (164299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:09,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41961 states to 41961 states and 164299 transitions. [2021-06-05 21:17:09,940 INFO L78 Accepts]: Start accepts. Automaton has 41961 states and 164299 transitions. Word has length 25 [2021-06-05 21:17:09,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:09,940 INFO L482 AbstractCegarLoop]: Abstraction has 41961 states and 164299 transitions. [2021-06-05 21:17:09,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:09,940 INFO L276 IsEmpty]: Start isEmpty. Operand 41961 states and 164299 transitions. [2021-06-05 21:17:10,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:10,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:10,004 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:10,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:10,205 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:10,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:10,205 INFO L82 PathProgramCache]: Analyzing trace with hash 820690328, now seen corresponding path program 87 times [2021-06-05 21:17:10,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:10,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625747385] [2021-06-05 21:17:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:10,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:10,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625747385] [2021-06-05 21:17:10,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625747385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:10,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403169254] [2021-06-05 21:17:10,236 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 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 21:17:10,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:17:10,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:10,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:10,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:10,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403169254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:10,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:10,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:17:10,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201216410] [2021-06-05 21:17:10,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:17:10,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:10,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:17:10,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:10,346 INFO L87 Difference]: Start difference. First operand 41961 states and 164299 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:10,617 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2021-06-05 21:17:11,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:11,615 INFO L93 Difference]: Finished difference Result 69090 states and 258749 transitions. [2021-06-05 21:17:11,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 21:17:11,616 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:17:11,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:11,785 INFO L225 Difference]: With dead ends: 69090 [2021-06-05 21:17:11,785 INFO L226 Difference]: Without dead ends: 69068 [2021-06-05 21:17:11,785 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 790.2ms TimeCoverageRelationStatistics Valid=596, Invalid=1954, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:17:11,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69068 states. [2021-06-05 21:17:13,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69068 to 41907. [2021-06-05 21:17:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41907 states, 41906 states have (on average 3.9144752541402186) internal successors, (164040), 41906 states have internal predecessors, (164040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41907 states to 41907 states and 164040 transitions. [2021-06-05 21:17:13,223 INFO L78 Accepts]: Start accepts. Automaton has 41907 states and 164040 transitions. Word has length 25 [2021-06-05 21:17:13,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:13,223 INFO L482 AbstractCegarLoop]: Abstraction has 41907 states and 164040 transitions. [2021-06-05 21:17:13,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:13,223 INFO L276 IsEmpty]: Start isEmpty. Operand 41907 states and 164040 transitions. [2021-06-05 21:17:13,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:13,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:13,284 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:13,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:13,484 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:13,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:13,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1463635770, now seen corresponding path program 54 times [2021-06-05 21:17:13,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:13,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165740673] [2021-06-05 21:17:13,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:13,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:13,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165740673] [2021-06-05 21:17:13,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165740673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:13,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770427109] [2021-06-05 21:17:13,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:17:13,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:17:13,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:13,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:13,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:13,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770427109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:13,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:13,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:17:13,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751799432] [2021-06-05 21:17:13,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:13,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:13,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:13,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:13,587 INFO L87 Difference]: Start difference. First operand 41907 states and 164040 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:13,912 INFO L93 Difference]: Finished difference Result 48500 states and 183886 transitions. [2021-06-05 21:17:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:13,913 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:17:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:14,026 INFO L225 Difference]: With dead ends: 48500 [2021-06-05 21:17:14,027 INFO L226 Difference]: Without dead ends: 48470 [2021-06-05 21:17:14,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:17:14,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48470 states. [2021-06-05 21:17:14,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48470 to 42003. [2021-06-05 21:17:14,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42003 states, 42002 states have (on average 3.912337507737727) internal successors, (164326), 42002 states have internal predecessors, (164326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:15,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42003 states to 42003 states and 164326 transitions. [2021-06-05 21:17:15,067 INFO L78 Accepts]: Start accepts. Automaton has 42003 states and 164326 transitions. Word has length 25 [2021-06-05 21:17:15,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:15,067 INFO L482 AbstractCegarLoop]: Abstraction has 42003 states and 164326 transitions. [2021-06-05 21:17:15,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:15,067 INFO L276 IsEmpty]: Start isEmpty. Operand 42003 states and 164326 transitions. [2021-06-05 21:17:15,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:15,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:15,130 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:15,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:15,330 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:15,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:15,331 INFO L82 PathProgramCache]: Analyzing trace with hash -121458378, now seen corresponding path program 88 times [2021-06-05 21:17:15,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:15,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766644662] [2021-06-05 21:17:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:15,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:15,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766644662] [2021-06-05 21:17:15,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766644662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:15,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641560005] [2021-06-05 21:17:15,552 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 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 21:17:15,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:15,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:15,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:15,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:15,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:15,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641560005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:15,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:15,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:17:15,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897996755] [2021-06-05 21:17:15,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:17:15,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:15,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:17:15,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:15,670 INFO L87 Difference]: Start difference. First operand 42003 states and 164326 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:17:16,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:16,416 INFO L93 Difference]: Finished difference Result 56025 states and 212844 transitions. [2021-06-05 21:17:16,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 21:17:16,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 25 [2021-06-05 21:17:16,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:16,560 INFO L225 Difference]: With dead ends: 56025 [2021-06-05 21:17:16,560 INFO L226 Difference]: Without dead ends: 56001 [2021-06-05 21:17:16,560 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 582.2ms TimeCoverageRelationStatistics Valid=292, Invalid=1190, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:17:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56001 states. [2021-06-05 21:17:17,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56001 to 42023. [2021-06-05 21:17:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42023 states, 42022 states have (on average 3.912284041692447) internal successors, (164402), 42022 states have internal predecessors, (164402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:17,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42023 states to 42023 states and 164402 transitions. [2021-06-05 21:17:17,673 INFO L78 Accepts]: Start accepts. Automaton has 42023 states and 164402 transitions. Word has length 25 [2021-06-05 21:17:17,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:17,673 INFO L482 AbstractCegarLoop]: Abstraction has 42023 states and 164402 transitions. [2021-06-05 21:17:17,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 21:17:17,673 INFO L276 IsEmpty]: Start isEmpty. Operand 42023 states and 164402 transitions. [2021-06-05 21:17:17,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:17,744 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:17,744 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:17,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 21:17:17,945 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:17,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:17,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1179719606, now seen corresponding path program 89 times [2021-06-05 21:17:17,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:17,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627996013] [2021-06-05 21:17:17,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:17,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:17,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627996013] [2021-06-05 21:17:17,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627996013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:17,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627207924] [2021-06-05 21:17:17,982 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 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 21:17:18,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:17:18,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:18,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:18,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:18,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627207924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:18,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:18,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:17:18,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263362485] [2021-06-05 21:17:18,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:17:18,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:18,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:17:18,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:18,104 INFO L87 Difference]: Start difference. First operand 42023 states and 164402 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:18,881 INFO L93 Difference]: Finished difference Result 54579 states and 208472 transitions. [2021-06-05 21:17:18,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:17:18,882 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:17:18,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:19,015 INFO L225 Difference]: With dead ends: 54579 [2021-06-05 21:17:19,015 INFO L226 Difference]: Without dead ends: 54555 [2021-06-05 21:17:19,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 327.9ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:17:19,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54555 states. [2021-06-05 21:17:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54555 to 41995. [2021-06-05 21:17:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41995 states, 41994 states have (on average 3.9124636852883747) internal successors, (164300), 41994 states have internal predecessors, (164300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:20,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41995 states to 41995 states and 164300 transitions. [2021-06-05 21:17:20,010 INFO L78 Accepts]: Start accepts. Automaton has 41995 states and 164300 transitions. Word has length 25 [2021-06-05 21:17:20,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:20,010 INFO L482 AbstractCegarLoop]: Abstraction has 41995 states and 164300 transitions. [2021-06-05 21:17:20,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:20,010 INFO L276 IsEmpty]: Start isEmpty. Operand 41995 states and 164300 transitions. [2021-06-05 21:17:20,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:20,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:20,075 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:20,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 21:17:20,275 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:20,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:20,275 INFO L82 PathProgramCache]: Analyzing trace with hash -366696404, now seen corresponding path program 90 times [2021-06-05 21:17:20,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:20,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240249034] [2021-06-05 21:17:20,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:20,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:20,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:20,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240249034] [2021-06-05 21:17:20,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240249034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:20,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143917796] [2021-06-05 21:17:20,312 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 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 21:17:20,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:17:20,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:20,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:20,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:20,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143917796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:20,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:20,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:17:20,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350254895] [2021-06-05 21:17:20,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:17:20,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:20,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:17:20,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:20,424 INFO L87 Difference]: Start difference. First operand 41995 states and 164300 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:21,237 INFO L93 Difference]: Finished difference Result 54843 states and 209486 transitions. [2021-06-05 21:17:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:17:21,237 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:17:21,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:21,371 INFO L225 Difference]: With dead ends: 54843 [2021-06-05 21:17:21,371 INFO L226 Difference]: Without dead ends: 54815 [2021-06-05 21:17:21,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 332.1ms TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:17:21,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54815 states. [2021-06-05 21:17:22,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54815 to 41993. [2021-06-05 21:17:22,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41993 states, 41992 states have (on average 3.912554772337588) internal successors, (164296), 41992 states have internal predecessors, (164296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:22,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41993 states to 41993 states and 164296 transitions. [2021-06-05 21:17:22,397 INFO L78 Accepts]: Start accepts. Automaton has 41993 states and 164296 transitions. Word has length 25 [2021-06-05 21:17:22,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:22,398 INFO L482 AbstractCegarLoop]: Abstraction has 41993 states and 164296 transitions. [2021-06-05 21:17:22,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:22,398 INFO L276 IsEmpty]: Start isEmpty. Operand 41993 states and 164296 transitions. [2021-06-05 21:17:22,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:22,474 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:22,474 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:22,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 21:17:22,674 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:22,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:22,675 INFO L82 PathProgramCache]: Analyzing trace with hash -2130720980, now seen corresponding path program 91 times [2021-06-05 21:17:22,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:22,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228088083] [2021-06-05 21:17:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:22,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:22,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228088083] [2021-06-05 21:17:22,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228088083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:22,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763726135] [2021-06-05 21:17:22,711 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 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 21:17:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:22,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:22,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:22,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763726135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:22,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:22,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:17:22,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838499047] [2021-06-05 21:17:22,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:17:22,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:22,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:17:22,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:22,840 INFO L87 Difference]: Start difference. First operand 41993 states and 164296 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:24,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:24,214 INFO L93 Difference]: Finished difference Result 74134 states and 278512 transitions. [2021-06-05 21:17:24,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 21:17:24,215 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:17:24,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:24,397 INFO L225 Difference]: With dead ends: 74134 [2021-06-05 21:17:24,397 INFO L226 Difference]: Without dead ends: 74134 [2021-06-05 21:17:24,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 724.2ms TimeCoverageRelationStatistics Valid=599, Invalid=2157, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 21:17:24,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74134 states. [2021-06-05 21:17:25,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74134 to 41984. [2021-06-05 21:17:25,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41984 states, 41983 states have (on average 3.9122501965081105) internal successors, (164248), 41983 states have internal predecessors, (164248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:25,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41984 states to 41984 states and 164248 transitions. [2021-06-05 21:17:25,592 INFO L78 Accepts]: Start accepts. Automaton has 41984 states and 164248 transitions. Word has length 25 [2021-06-05 21:17:25,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:25,592 INFO L482 AbstractCegarLoop]: Abstraction has 41984 states and 164248 transitions. [2021-06-05 21:17:25,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:25,592 INFO L276 IsEmpty]: Start isEmpty. Operand 41984 states and 164248 transitions. [2021-06-05 21:17:25,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:25,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:25,657 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:25,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 21:17:25,861 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:25,861 INFO L82 PathProgramCache]: Analyzing trace with hash 44304356, now seen corresponding path program 92 times [2021-06-05 21:17:25,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:25,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445220977] [2021-06-05 21:17:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:25,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:25,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445220977] [2021-06-05 21:17:25,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445220977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:25,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910103394] [2021-06-05 21:17:25,895 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 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 21:17:25,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:25,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:25,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:25,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:26,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910103394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:26,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:26,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:17:26,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452581170] [2021-06-05 21:17:26,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:17:26,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:26,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:17:26,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:26,011 INFO L87 Difference]: Start difference. First operand 41984 states and 164248 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:27,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:27,361 INFO L93 Difference]: Finished difference Result 71663 states and 269937 transitions. [2021-06-05 21:17:27,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 21:17:27,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:17:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:27,543 INFO L225 Difference]: With dead ends: 71663 [2021-06-05 21:17:27,543 INFO L226 Difference]: Without dead ends: 71645 [2021-06-05 21:17:27,543 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 911.0ms TimeCoverageRelationStatistics Valid=593, Invalid=2269, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 21:17:27,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71645 states. [2021-06-05 21:17:28,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71645 to 41971. [2021-06-05 21:17:28,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41971 states, 41970 states have (on average 3.911984751012628) internal successors, (164186), 41970 states have internal predecessors, (164186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:28,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41971 states to 41971 states and 164186 transitions. [2021-06-05 21:17:28,815 INFO L78 Accepts]: Start accepts. Automaton has 41971 states and 164186 transitions. Word has length 25 [2021-06-05 21:17:28,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:28,815 INFO L482 AbstractCegarLoop]: Abstraction has 41971 states and 164186 transitions. [2021-06-05 21:17:28,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:28,815 INFO L276 IsEmpty]: Start isEmpty. Operand 41971 states and 164186 transitions. [2021-06-05 21:17:28,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:28,879 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:28,879 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:29,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 21:17:29,080 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:29,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:29,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1788668362, now seen corresponding path program 93 times [2021-06-05 21:17:29,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:29,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242863765] [2021-06-05 21:17:29,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:29,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:29,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242863765] [2021-06-05 21:17:29,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242863765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:29,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484388970] [2021-06-05 21:17:29,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:17:29,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:17:29,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:29,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:29,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:29,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:29,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484388970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:29,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:29,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:17:29,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357539898] [2021-06-05 21:17:29,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:17:29,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:29,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:17:29,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:29,228 INFO L87 Difference]: Start difference. First operand 41971 states and 164186 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:30,372 INFO L93 Difference]: Finished difference Result 59035 states and 223208 transitions. [2021-06-05 21:17:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 21:17:30,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:17:30,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:30,516 INFO L225 Difference]: With dead ends: 59035 [2021-06-05 21:17:30,516 INFO L226 Difference]: Without dead ends: 59009 [2021-06-05 21:17:30,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 800.0ms TimeCoverageRelationStatistics Valid=456, Invalid=1614, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 21:17:30,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59009 states. [2021-06-05 21:17:31,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59009 to 41946. [2021-06-05 21:17:31,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41946 states, 41945 states have (on average 3.912075336750507) internal successors, (164092), 41945 states have internal predecessors, (164092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:31,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41946 states to 41946 states and 164092 transitions. [2021-06-05 21:17:31,549 INFO L78 Accepts]: Start accepts. Automaton has 41946 states and 164092 transitions. Word has length 25 [2021-06-05 21:17:31,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:31,549 INFO L482 AbstractCegarLoop]: Abstraction has 41946 states and 164092 transitions. [2021-06-05 21:17:31,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:31,549 INFO L276 IsEmpty]: Start isEmpty. Operand 41946 states and 164092 transitions. [2021-06-05 21:17:31,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:31,614 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:31,614 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:31,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-06-05 21:17:31,815 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:31,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:31,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1822725736, now seen corresponding path program 94 times [2021-06-05 21:17:31,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:31,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995313979] [2021-06-05 21:17:31,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:31,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:31,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995313979] [2021-06-05 21:17:31,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995313979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:31,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585246859] [2021-06-05 21:17:31,849 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 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 21:17:31,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:31,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:31,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:31,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:31,960 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:31,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585246859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:31,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:31,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:17:31,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348609416] [2021-06-05 21:17:31,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:17:31,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:31,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:17:31,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:17:31,961 INFO L87 Difference]: Start difference. First operand 41946 states and 164092 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:33,435 INFO L93 Difference]: Finished difference Result 70144 states and 262472 transitions. [2021-06-05 21:17:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 21:17:33,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:17:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:33,610 INFO L225 Difference]: With dead ends: 70144 [2021-06-05 21:17:33,610 INFO L226 Difference]: Without dead ends: 70123 [2021-06-05 21:17:33,611 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 722.4ms TimeCoverageRelationStatistics Valid=545, Invalid=2005, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 21:17:33,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70123 states. [2021-06-05 21:17:34,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70123 to 45168. [2021-06-05 21:17:34,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45168 states, 45167 states have (on average 3.9203622113489938) internal successors, (177071), 45167 states have internal predecessors, (177071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:34,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45168 states to 45168 states and 177071 transitions. [2021-06-05 21:17:34,903 INFO L78 Accepts]: Start accepts. Automaton has 45168 states and 177071 transitions. Word has length 25 [2021-06-05 21:17:34,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:34,903 INFO L482 AbstractCegarLoop]: Abstraction has 45168 states and 177071 transitions. [2021-06-05 21:17:34,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:34,903 INFO L276 IsEmpty]: Start isEmpty. Operand 45168 states and 177071 transitions. [2021-06-05 21:17:34,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:34,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:34,972 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:35,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:35,172 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:35,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:35,173 INFO L82 PathProgramCache]: Analyzing trace with hash -547677804, now seen corresponding path program 95 times [2021-06-05 21:17:35,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:35,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839876047] [2021-06-05 21:17:35,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:35,399 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 21:17:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:35,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:35,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839876047] [2021-06-05 21:17:35,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839876047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:35,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188820971] [2021-06-05 21:17:35,433 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 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 21:17:35,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:17:35,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:35,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:35,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:35,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188820971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:35,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:35,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:17:35,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547886393] [2021-06-05 21:17:35,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:17:35,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:35,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:17:35,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:17:35,553 INFO L87 Difference]: Start difference. First operand 45168 states and 177071 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:17:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:36,778 INFO L93 Difference]: Finished difference Result 69522 states and 260487 transitions. [2021-06-05 21:17:36,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 21:17:36,779 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:17:36,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:36,949 INFO L225 Difference]: With dead ends: 69522 [2021-06-05 21:17:36,949 INFO L226 Difference]: Without dead ends: 69522 [2021-06-05 21:17:36,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 963.4ms TimeCoverageRelationStatistics Valid=637, Invalid=2333, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 21:17:37,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69522 states. [2021-06-05 21:17:37,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69522 to 45166. [2021-06-05 21:17:38,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45166 states, 45165 states have (on average 3.9201815565150007) internal successors, (177055), 45165 states have internal predecessors, (177055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:38,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45166 states to 45166 states and 177055 transitions. [2021-06-05 21:17:38,346 INFO L78 Accepts]: Start accepts. Automaton has 45166 states and 177055 transitions. Word has length 25 [2021-06-05 21:17:38,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:38,346 INFO L482 AbstractCegarLoop]: Abstraction has 45166 states and 177055 transitions. [2021-06-05 21:17:38,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:17:38,346 INFO L276 IsEmpty]: Start isEmpty. Operand 45166 states and 177055 transitions. [2021-06-05 21:17:38,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:38,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:38,415 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:38,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:38,616 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:38,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:38,616 INFO L82 PathProgramCache]: Analyzing trace with hash -61873700, now seen corresponding path program 96 times [2021-06-05 21:17:38,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:38,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559334171] [2021-06-05 21:17:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:38,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:38,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559334171] [2021-06-05 21:17:38,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559334171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:38,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75611336] [2021-06-05 21:17:38,656 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 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 21:17:38,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:17:38,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:38,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:38,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:38,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75611336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:38,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:38,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:17:38,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851718377] [2021-06-05 21:17:38,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:17:38,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:38,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:17:38,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:17:38,771 INFO L87 Difference]: Start difference. First operand 45166 states and 177055 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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 21:17:39,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:39,943 INFO L93 Difference]: Finished difference Result 66133 states and 248811 transitions. [2021-06-05 21:17:39,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 21:17:39,943 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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 25 [2021-06-05 21:17:39,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:40,109 INFO L225 Difference]: With dead ends: 66133 [2021-06-05 21:17:40,109 INFO L226 Difference]: Without dead ends: 66119 [2021-06-05 21:17:40,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 736.5ms TimeCoverageRelationStatistics Valid=643, Invalid=2549, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 21:17:40,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66119 states. [2021-06-05 21:17:41,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66119 to 45154. [2021-06-05 21:17:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45154 states, 45153 states have (on average 3.9200939029521846) internal successors, (177004), 45153 states have internal predecessors, (177004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:41,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45154 states to 45154 states and 177004 transitions. [2021-06-05 21:17:41,497 INFO L78 Accepts]: Start accepts. Automaton has 45154 states and 177004 transitions. Word has length 25 [2021-06-05 21:17:41,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:41,497 INFO L482 AbstractCegarLoop]: Abstraction has 45154 states and 177004 transitions. [2021-06-05 21:17:41,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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 21:17:41,497 INFO L276 IsEmpty]: Start isEmpty. Operand 45154 states and 177004 transitions. [2021-06-05 21:17:41,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:41,565 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:41,565 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:41,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:41,765 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:41,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:41,766 INFO L82 PathProgramCache]: Analyzing trace with hash -698340554, now seen corresponding path program 97 times [2021-06-05 21:17:41,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:41,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258586461] [2021-06-05 21:17:41,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:41,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:41,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258586461] [2021-06-05 21:17:41,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258586461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:41,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754405064] [2021-06-05 21:17:41,809 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 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 21:17:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:41,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:17:41,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:41,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754405064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:41,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:41,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:17:41,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754186664] [2021-06-05 21:17:41,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:17:41,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:41,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:17:41,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:17:41,922 INFO L87 Difference]: Start difference. First operand 45154 states and 177004 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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 21:17:42,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:42,858 INFO L93 Difference]: Finished difference Result 60933 states and 232778 transitions. [2021-06-05 21:17:42,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:17:42,859 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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 25 [2021-06-05 21:17:42,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:43,008 INFO L225 Difference]: With dead ends: 60933 [2021-06-05 21:17:43,008 INFO L226 Difference]: Without dead ends: 60909 [2021-06-05 21:17:43,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 584.9ms TimeCoverageRelationStatistics Valid=445, Invalid=1717, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:17:43,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60909 states. [2021-06-05 21:17:43,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60909 to 45110. [2021-06-05 21:17:44,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45110 states, 45109 states have (on average 3.9205258374160366) internal successors, (176851), 45109 states have internal predecessors, (176851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:44,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45110 states to 45110 states and 176851 transitions. [2021-06-05 21:17:44,391 INFO L78 Accepts]: Start accepts. Automaton has 45110 states and 176851 transitions. Word has length 25 [2021-06-05 21:17:44,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:44,391 INFO L482 AbstractCegarLoop]: Abstraction has 45110 states and 176851 transitions. [2021-06-05 21:17:44,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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 21:17:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 45110 states and 176851 transitions. [2021-06-05 21:17:44,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:44,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:44,462 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:44,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:44,662 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:44,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:44,662 INFO L82 PathProgramCache]: Analyzing trace with hash -901130092, now seen corresponding path program 55 times [2021-06-05 21:17:44,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:44,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381193342] [2021-06-05 21:17:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:44,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:44,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381193342] [2021-06-05 21:17:44,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381193342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:44,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667385309] [2021-06-05 21:17:44,701 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 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 21:17:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:44,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:17:44,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:44,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667385309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:44,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:44,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:17:44,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794780976] [2021-06-05 21:17:44,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:17:44,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:44,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:17:44,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:17:44,824 INFO L87 Difference]: Start difference. First operand 45110 states and 176851 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:45,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:45,400 INFO L93 Difference]: Finished difference Result 46027 states and 179343 transitions. [2021-06-05 21:17:45,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 21:17:45,401 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:17:45,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:45,509 INFO L225 Difference]: With dead ends: 46027 [2021-06-05 21:17:45,509 INFO L226 Difference]: Without dead ends: 46020 [2021-06-05 21:17:45,509 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 268.2ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:17:45,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46020 states. [2021-06-05 21:17:46,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46020 to 45203. [2021-06-05 21:17:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45203 states, 45202 states have (on average 3.919538958453166) internal successors, (177171), 45202 states have internal predecessors, (177171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45203 states to 45203 states and 177171 transitions. [2021-06-05 21:17:46,546 INFO L78 Accepts]: Start accepts. Automaton has 45203 states and 177171 transitions. Word has length 25 [2021-06-05 21:17:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:46,546 INFO L482 AbstractCegarLoop]: Abstraction has 45203 states and 177171 transitions. [2021-06-05 21:17:46,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:46,546 INFO L276 IsEmpty]: Start isEmpty. Operand 45203 states and 177171 transitions. [2021-06-05 21:17:46,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:46,617 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:46,617 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:46,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:46,821 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:46,821 INFO L82 PathProgramCache]: Analyzing trace with hash 203464600, now seen corresponding path program 56 times [2021-06-05 21:17:46,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:46,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147636817] [2021-06-05 21:17:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:46,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:46,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:46,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:46,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147636817] [2021-06-05 21:17:46,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147636817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:46,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328441291] [2021-06-05 21:17:46,862 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 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 21:17:46,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:46,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:46,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:17:46,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:46,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328441291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:46,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:46,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:17:46,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916917963] [2021-06-05 21:17:46,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:17:46,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:46,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:17:46,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:17:46,985 INFO L87 Difference]: Start difference. First operand 45203 states and 177171 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:17:47,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:47,832 INFO L93 Difference]: Finished difference Result 46188 states and 179849 transitions. [2021-06-05 21:17:47,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:17:47,832 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-06-05 21:17:47,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:47,940 INFO L225 Difference]: With dead ends: 46188 [2021-06-05 21:17:47,941 INFO L226 Difference]: Without dead ends: 46188 [2021-06-05 21:17:47,941 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=262, Invalid=928, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:17:47,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46188 states. [2021-06-05 21:17:48,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46188 to 45098. [2021-06-05 21:17:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45098 states, 45097 states have (on average 3.9206599108588156) internal successors, (176810), 45097 states have internal predecessors, (176810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45098 states to 45098 states and 176810 transitions. [2021-06-05 21:17:49,068 INFO L78 Accepts]: Start accepts. Automaton has 45098 states and 176810 transitions. Word has length 25 [2021-06-05 21:17:49,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:49,068 INFO L482 AbstractCegarLoop]: Abstraction has 45098 states and 176810 transitions. [2021-06-05 21:17:49,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 21:17:49,068 INFO L276 IsEmpty]: Start isEmpty. Operand 45098 states and 176810 transitions. [2021-06-05 21:17:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:49,141 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:49,141 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:49,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:49,342 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:49,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:49,342 INFO L82 PathProgramCache]: Analyzing trace with hash 118243368, now seen corresponding path program 13 times [2021-06-05 21:17:49,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:49,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973989514] [2021-06-05 21:17:49,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:49,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:49,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973989514] [2021-06-05 21:17:49,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973989514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:49,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45847681] [2021-06-05 21:17:49,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:17:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:49,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:17:49,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:49,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45847681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:49,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:49,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:17:49,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356148291] [2021-06-05 21:17:49,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:17:49,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:49,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:17:49,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:17:49,501 INFO L87 Difference]: Start difference. First operand 45098 states and 176810 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:50,177 INFO L93 Difference]: Finished difference Result 45514 states and 177888 transitions. [2021-06-05 21:17:50,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 21:17:50,177 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:17:50,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:50,282 INFO L225 Difference]: With dead ends: 45514 [2021-06-05 21:17:50,283 INFO L226 Difference]: Without dead ends: 45514 [2021-06-05 21:17:50,283 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 401.2ms TimeCoverageRelationStatistics Valid=321, Invalid=1319, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:17:50,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45514 states. [2021-06-05 21:17:51,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45514 to 45166. [2021-06-05 21:17:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45166 states, 45165 states have (on average 3.919406620170486) internal successors, (177020), 45165 states have internal predecessors, (177020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45166 states to 45166 states and 177020 transitions. [2021-06-05 21:17:51,298 INFO L78 Accepts]: Start accepts. Automaton has 45166 states and 177020 transitions. Word has length 25 [2021-06-05 21:17:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:51,298 INFO L482 AbstractCegarLoop]: Abstraction has 45166 states and 177020 transitions. [2021-06-05 21:17:51,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:51,298 INFO L276 IsEmpty]: Start isEmpty. Operand 45166 states and 177020 transitions. [2021-06-05 21:17:51,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:51,368 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:51,368 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:51,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 21:17:51,568 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:51,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1002298468, now seen corresponding path program 14 times [2021-06-05 21:17:51,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:51,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912909457] [2021-06-05 21:17:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:51,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:51,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912909457] [2021-06-05 21:17:51,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912909457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:51,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68453155] [2021-06-05 21:17:51,593 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 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 21:17:51,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:17:51,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:51,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:51,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:51,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68453155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:51,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:51,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 21:17:51,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759358807] [2021-06-05 21:17:51,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:51,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:51,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:51,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:51,673 INFO L87 Difference]: Start difference. First operand 45166 states and 177020 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:52,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:52,377 INFO L93 Difference]: Finished difference Result 72292 states and 278253 transitions. [2021-06-05 21:17:52,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:17:52,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:17:52,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:52,590 INFO L225 Difference]: With dead ends: 72292 [2021-06-05 21:17:52,591 INFO L226 Difference]: Without dead ends: 72266 [2021-06-05 21:17:52,591 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:17:52,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72266 states. [2021-06-05 21:17:53,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72266 to 59431. [2021-06-05 21:17:53,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59431 states, 59430 states have (on average 3.973548712771328) internal successors, (236148), 59430 states have internal predecessors, (236148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:54,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59431 states to 59431 states and 236148 transitions. [2021-06-05 21:17:54,067 INFO L78 Accepts]: Start accepts. Automaton has 59431 states and 236148 transitions. Word has length 25 [2021-06-05 21:17:54,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:54,067 INFO L482 AbstractCegarLoop]: Abstraction has 59431 states and 236148 transitions. [2021-06-05 21:17:54,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:54,067 INFO L276 IsEmpty]: Start isEmpty. Operand 59431 states and 236148 transitions. [2021-06-05 21:17:54,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:54,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:54,170 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:54,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:17:54,371 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:54,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:54,371 INFO L82 PathProgramCache]: Analyzing trace with hash -170939552, now seen corresponding path program 15 times [2021-06-05 21:17:54,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:54,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972618183] [2021-06-05 21:17:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:54,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:54,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972618183] [2021-06-05 21:17:54,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972618183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:54,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395972873] [2021-06-05 21:17:54,399 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 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 21:17:54,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:17:54,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:54,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:17:54,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:54,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395972873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:54,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:54,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:17:54,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684704480] [2021-06-05 21:17:54,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:17:54,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:54,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:17:54,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:17:54,535 INFO L87 Difference]: Start difference. First operand 59431 states and 236148 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:55,028 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-06-05 21:17:55,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:55,563 INFO L93 Difference]: Finished difference Result 60679 states and 239362 transitions. [2021-06-05 21:17:55,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:17:55,563 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:17:55,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:55,725 INFO L225 Difference]: With dead ends: 60679 [2021-06-05 21:17:55,725 INFO L226 Difference]: Without dead ends: 60679 [2021-06-05 21:17:55,725 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 652.3ms TimeCoverageRelationStatistics Valid=316, Invalid=1166, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 21:17:55,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60679 states. [2021-06-05 21:17:56,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60679 to 59583. [2021-06-05 21:17:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59583 states, 59582 states have (on average 3.9715350273572554) internal successors, (236632), 59582 states have internal predecessors, (236632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59583 states to 59583 states and 236632 transitions. [2021-06-05 21:17:57,078 INFO L78 Accepts]: Start accepts. Automaton has 59583 states and 236632 transitions. Word has length 25 [2021-06-05 21:17:57,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:17:57,078 INFO L482 AbstractCegarLoop]: Abstraction has 59583 states and 236632 transitions. [2021-06-05 21:17:57,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:17:57,079 INFO L276 IsEmpty]: Start isEmpty. Operand 59583 states and 236632 transitions. [2021-06-05 21:17:57,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:17:57,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:17:57,187 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:17:57,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 21:17:57,387 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:17:57,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:17:57,387 INFO L82 PathProgramCache]: Analyzing trace with hash -604049820, now seen corresponding path program 16 times [2021-06-05 21:17:57,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:17:57,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831959806] [2021-06-05 21:17:57,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:17:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:17:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:17:57,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:17:57,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831959806] [2021-06-05 21:17:57,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831959806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:57,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189350703] [2021-06-05 21:17:57,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:17:57,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:17:57,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:17:57,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:17:57,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:17:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:17:57,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189350703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:17:57,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:17:57,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:17:57,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934766801] [2021-06-05 21:17:57,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:17:57,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:17:57,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:17:57,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:17:57,490 INFO L87 Difference]: Start difference. First operand 59583 states and 236632 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 21:17:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:17:58,316 INFO L93 Difference]: Finished difference Result 82434 states and 312359 transitions. [2021-06-05 21:17:58,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:17:58,316 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 25 [2021-06-05 21:17:58,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:17:58,540 INFO L225 Difference]: With dead ends: 82434 [2021-06-05 21:17:58,541 INFO L226 Difference]: Without dead ends: 82434 [2021-06-05 21:17:58,541 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:17:58,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82434 states. [2021-06-05 21:17:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82434 to 57923. [2021-06-05 21:17:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57923 states, 57922 states have (on average 3.962294119678188) internal successors, (229504), 57922 states have internal predecessors, (229504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:00,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57923 states to 57923 states and 229504 transitions. [2021-06-05 21:18:00,162 INFO L78 Accepts]: Start accepts. Automaton has 57923 states and 229504 transitions. Word has length 25 [2021-06-05 21:18:00,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:00,162 INFO L482 AbstractCegarLoop]: Abstraction has 57923 states and 229504 transitions. [2021-06-05 21:18:00,162 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 21:18:00,162 INFO L276 IsEmpty]: Start isEmpty. Operand 57923 states and 229504 transitions. [2021-06-05 21:18:00,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:00,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:00,263 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:00,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:00,463 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:00,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:00,463 INFO L82 PathProgramCache]: Analyzing trace with hash -297815200, now seen corresponding path program 17 times [2021-06-05 21:18:00,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:00,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454728602] [2021-06-05 21:18:00,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:00,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:00,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454728602] [2021-06-05 21:18:00,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454728602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:00,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992702259] [2021-06-05 21:18:00,491 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 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 21:18:00,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:18:00,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:00,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:18:00,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:00,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992702259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:00,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:00,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:18:00,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373760596] [2021-06-05 21:18:00,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:00,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:00,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:00,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:00,724 INFO L87 Difference]: Start difference. First operand 57923 states and 229504 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:18:01,007 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 9 [2021-06-05 21:18:01,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:01,758 INFO L93 Difference]: Finished difference Result 58661 states and 231313 transitions. [2021-06-05 21:18:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 21:18:01,758 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:18:01,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:01,914 INFO L225 Difference]: With dead ends: 58661 [2021-06-05 21:18:01,914 INFO L226 Difference]: Without dead ends: 58654 [2021-06-05 21:18:01,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 641.9ms TimeCoverageRelationStatistics Valid=282, Invalid=1124, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:18:01,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58654 states. [2021-06-05 21:18:03,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58654 to 57923. [2021-06-05 21:18:03,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57923 states, 57922 states have (on average 3.962259590483754) internal successors, (229502), 57922 states have internal predecessors, (229502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57923 states to 57923 states and 229502 transitions. [2021-06-05 21:18:03,284 INFO L78 Accepts]: Start accepts. Automaton has 57923 states and 229502 transitions. Word has length 25 [2021-06-05 21:18:03,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:03,284 INFO L482 AbstractCegarLoop]: Abstraction has 57923 states and 229502 transitions. [2021-06-05 21:18:03,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:18:03,284 INFO L276 IsEmpty]: Start isEmpty. Operand 57923 states and 229502 transitions. [2021-06-05 21:18:03,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:03,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:03,389 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:03,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:03,589 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:03,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:03,590 INFO L82 PathProgramCache]: Analyzing trace with hash 2110520852, now seen corresponding path program 18 times [2021-06-05 21:18:03,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:03,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131193975] [2021-06-05 21:18:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:03,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:03,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131193975] [2021-06-05 21:18:03,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131193975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:03,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081255138] [2021-06-05 21:18:03,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:18:03,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:18:03,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:03,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:18:03,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:03,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081255138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:03,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:03,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:18:03,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870396704] [2021-06-05 21:18:03,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:03,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:03,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:03,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:03,751 INFO L87 Difference]: Start difference. First operand 57923 states and 229502 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:04,233 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-06-05 21:18:04,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:04,948 INFO L93 Difference]: Finished difference Result 59862 states and 234684 transitions. [2021-06-05 21:18:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 21:18:04,948 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:18:04,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:05,105 INFO L225 Difference]: With dead ends: 59862 [2021-06-05 21:18:05,105 INFO L226 Difference]: Without dead ends: 59862 [2021-06-05 21:18:05,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 778.7ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 21:18:05,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59862 states. [2021-06-05 21:18:06,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59862 to 58277. [2021-06-05 21:18:06,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58277 states, 58276 states have (on average 3.957735602992656) internal successors, (230641), 58276 states have internal predecessors, (230641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58277 states to 58277 states and 230641 transitions. [2021-06-05 21:18:06,390 INFO L78 Accepts]: Start accepts. Automaton has 58277 states and 230641 transitions. Word has length 25 [2021-06-05 21:18:06,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:06,390 INFO L482 AbstractCegarLoop]: Abstraction has 58277 states and 230641 transitions. [2021-06-05 21:18:06,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:06,391 INFO L276 IsEmpty]: Start isEmpty. Operand 58277 states and 230641 transitions. [2021-06-05 21:18:06,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:06,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:06,491 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:06,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 21:18:06,691 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:06,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:06,692 INFO L82 PathProgramCache]: Analyzing trace with hash 698853140, now seen corresponding path program 19 times [2021-06-05 21:18:06,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:06,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729030134] [2021-06-05 21:18:06,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:06,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:06,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729030134] [2021-06-05 21:18:06,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729030134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:06,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701336644] [2021-06-05 21:18:06,711 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 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 21:18:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:06,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:18:06,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 21:18:06,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701336644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:06,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:06,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 21:18:06,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361405320] [2021-06-05 21:18:06,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 21:18:06,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:06,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 21:18:06,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 21:18:06,781 INFO L87 Difference]: Start difference. First operand 58277 states and 230641 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 21:18:07,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:07,571 INFO L93 Difference]: Finished difference Result 80678 states and 310924 transitions. [2021-06-05 21:18:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:18:07,571 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 25 [2021-06-05 21:18:07,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:07,785 INFO L225 Difference]: With dead ends: 80678 [2021-06-05 21:18:07,785 INFO L226 Difference]: Without dead ends: 80672 [2021-06-05 21:18:07,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:18:07,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80672 states. [2021-06-05 21:18:09,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80672 to 64580. [2021-06-05 21:18:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64580 states, 64579 states have (on average 3.9736911379860325) internal successors, (256617), 64579 states have internal predecessors, (256617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:09,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64580 states to 64580 states and 256617 transitions. [2021-06-05 21:18:09,404 INFO L78 Accepts]: Start accepts. Automaton has 64580 states and 256617 transitions. Word has length 25 [2021-06-05 21:18:09,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:09,404 INFO L482 AbstractCegarLoop]: Abstraction has 64580 states and 256617 transitions. [2021-06-05 21:18:09,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 21:18:09,404 INFO L276 IsEmpty]: Start isEmpty. Operand 64580 states and 256617 transitions. [2021-06-05 21:18:09,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:09,513 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:09,513 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:09,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:09,713 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:09,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:09,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1677410584, now seen corresponding path program 20 times [2021-06-05 21:18:09,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:09,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556871162] [2021-06-05 21:18:09,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:09,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:09,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556871162] [2021-06-05 21:18:09,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556871162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:09,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117181304] [2021-06-05 21:18:09,734 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 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 21:18:09,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:09,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:09,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:18:09,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 21:18:09,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117181304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:09,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:09,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 21:18:09,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653328575] [2021-06-05 21:18:09,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:18:09,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:09,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:18:09,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:18:09,825 INFO L87 Difference]: Start difference. First operand 64580 states and 256617 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:10,166 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2021-06-05 21:18:10,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:10,700 INFO L93 Difference]: Finished difference Result 87946 states and 334328 transitions. [2021-06-05 21:18:10,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:18:10,700 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:18:10,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:10,922 INFO L225 Difference]: With dead ends: 87946 [2021-06-05 21:18:10,922 INFO L226 Difference]: Without dead ends: 87939 [2021-06-05 21:18:10,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 449.3ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-06-05 21:18:11,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87939 states. [2021-06-05 21:18:12,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87939 to 63333. [2021-06-05 21:18:12,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63333 states, 63332 states have (on average 3.966541400871597) internal successors, (251209), 63332 states have internal predecessors, (251209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63333 states to 63333 states and 251209 transitions. [2021-06-05 21:18:12,870 INFO L78 Accepts]: Start accepts. Automaton has 63333 states and 251209 transitions. Word has length 25 [2021-06-05 21:18:12,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:12,870 INFO L482 AbstractCegarLoop]: Abstraction has 63333 states and 251209 transitions. [2021-06-05 21:18:12,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:12,870 INFO L276 IsEmpty]: Start isEmpty. Operand 63333 states and 251209 transitions. [2021-06-05 21:18:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:12,988 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:12,988 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:13,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:13,189 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:13,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:13,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1983645204, now seen corresponding path program 21 times [2021-06-05 21:18:13,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:13,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727820005] [2021-06-05 21:18:13,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:13,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:13,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727820005] [2021-06-05 21:18:13,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727820005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:13,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992181279] [2021-06-05 21:18:13,216 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 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 21:18:13,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:18:13,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:13,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:18:13,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:13,338 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:13,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992181279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:13,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:13,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:18:13,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902651971] [2021-06-05 21:18:13,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:13,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:13,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:13,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:13,339 INFO L87 Difference]: Start difference. First operand 63333 states and 251209 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:18:14,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:14,164 INFO L93 Difference]: Finished difference Result 64565 states and 254237 transitions. [2021-06-05 21:18:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 21:18:14,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:18:14,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:14,329 INFO L225 Difference]: With dead ends: 64565 [2021-06-05 21:18:14,329 INFO L226 Difference]: Without dead ends: 64544 [2021-06-05 21:18:14,330 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 412.5ms TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:18:14,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64544 states. [2021-06-05 21:18:15,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64544 to 63235. [2021-06-05 21:18:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63235 states, 63234 states have (on average 3.9675807318847456) internal successors, (250886), 63234 states have internal predecessors, (250886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63235 states to 63235 states and 250886 transitions. [2021-06-05 21:18:15,986 INFO L78 Accepts]: Start accepts. Automaton has 63235 states and 250886 transitions. Word has length 25 [2021-06-05 21:18:15,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:15,987 INFO L482 AbstractCegarLoop]: Abstraction has 63235 states and 250886 transitions. [2021-06-05 21:18:15,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:18:15,987 INFO L276 IsEmpty]: Start isEmpty. Operand 63235 states and 250886 transitions. [2021-06-05 21:18:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:16,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:16,094 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:16,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:16,294 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:16,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:16,295 INFO L82 PathProgramCache]: Analyzing trace with hash -403061012, now seen corresponding path program 22 times [2021-06-05 21:18:16,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:16,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060957372] [2021-06-05 21:18:16,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:16,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:16,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060957372] [2021-06-05 21:18:16,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060957372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:16,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907331194] [2021-06-05 21:18:16,318 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 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 21:18:16,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:16,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:16,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:18:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:16,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907331194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:16,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:16,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 21:18:16,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712279867] [2021-06-05 21:18:16,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 21:18:16,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:16,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 21:18:16,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-06-05 21:18:16,400 INFO L87 Difference]: Start difference. First operand 63235 states and 250886 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:16,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:16,976 INFO L93 Difference]: Finished difference Result 87988 states and 335139 transitions. [2021-06-05 21:18:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 21:18:16,977 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:18:16,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:17,203 INFO L225 Difference]: With dead ends: 87988 [2021-06-05 21:18:17,203 INFO L226 Difference]: Without dead ends: 87981 [2021-06-05 21:18:17,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-06-05 21:18:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87981 states. [2021-06-05 21:18:18,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87981 to 64228. [2021-06-05 21:18:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64228 states, 64227 states have (on average 3.9669142261042865) internal successors, (254783), 64227 states have internal predecessors, (254783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64228 states to 64228 states and 254783 transitions. [2021-06-05 21:18:19,121 INFO L78 Accepts]: Start accepts. Automaton has 64228 states and 254783 transitions. Word has length 25 [2021-06-05 21:18:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:19,121 INFO L482 AbstractCegarLoop]: Abstraction has 64228 states and 254783 transitions. [2021-06-05 21:18:19,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 64228 states and 254783 transitions. [2021-06-05 21:18:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:19,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:19,226 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:19,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:19,426 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:19,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:19,427 INFO L82 PathProgramCache]: Analyzing trace with hash 147370776, now seen corresponding path program 23 times [2021-06-05 21:18:19,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:19,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078143628] [2021-06-05 21:18:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:19,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:19,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078143628] [2021-06-05 21:18:19,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078143628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:19,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070674917] [2021-06-05 21:18:19,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:18:19,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:18:19,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:19,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:18:19,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:19,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:19,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070674917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:19,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:19,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:18:19,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012188180] [2021-06-05 21:18:19,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:18:19,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:19,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:18:19,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:19,607 INFO L87 Difference]: Start difference. First operand 64228 states and 254783 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:20,396 INFO L93 Difference]: Finished difference Result 65330 states and 257583 transitions. [2021-06-05 21:18:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 21:18:20,397 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:18:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:20,871 INFO L225 Difference]: With dead ends: 65330 [2021-06-05 21:18:20,871 INFO L226 Difference]: Without dead ends: 65288 [2021-06-05 21:18:20,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=338, Invalid=1302, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 21:18:20,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65288 states. [2021-06-05 21:18:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65288 to 64286. [2021-06-05 21:18:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64286 states, 64285 states have (on average 3.9662751808353427) internal successors, (254972), 64285 states have internal predecessors, (254972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:22,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64286 states to 64286 states and 254972 transitions. [2021-06-05 21:18:22,280 INFO L78 Accepts]: Start accepts. Automaton has 64286 states and 254972 transitions. Word has length 25 [2021-06-05 21:18:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:22,280 INFO L482 AbstractCegarLoop]: Abstraction has 64286 states and 254972 transitions. [2021-06-05 21:18:22,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:22,280 INFO L276 IsEmpty]: Start isEmpty. Operand 64286 states and 254972 transitions. [2021-06-05 21:18:22,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:22,388 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:22,388 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:22,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:22,588 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:22,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:22,589 INFO L82 PathProgramCache]: Analyzing trace with hash -329451636, now seen corresponding path program 24 times [2021-06-05 21:18:22,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:22,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641693198] [2021-06-05 21:18:22,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:22,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:22,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641693198] [2021-06-05 21:18:22,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641693198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:22,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857663838] [2021-06-05 21:18:22,620 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 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 21:18:22,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:18:22,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:22,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:18:22,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:22,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857663838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:22,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:22,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:18:22,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948397856] [2021-06-05 21:18:22,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:18:22,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:22,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:18:22,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:22,751 INFO L87 Difference]: Start difference. First operand 64286 states and 254972 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:23,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:23,963 INFO L93 Difference]: Finished difference Result 65661 states and 258484 transitions. [2021-06-05 21:18:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 21:18:23,964 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:18:23,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:24,140 INFO L225 Difference]: With dead ends: 65661 [2021-06-05 21:18:24,140 INFO L226 Difference]: Without dead ends: 65661 [2021-06-05 21:18:24,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 499.1ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 21:18:24,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65661 states. [2021-06-05 21:18:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65661 to 64188. [2021-06-05 21:18:25,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64188 states, 64187 states have (on average 3.967080561484413) internal successors, (254635), 64187 states have internal predecessors, (254635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64188 states to 64188 states and 254635 transitions. [2021-06-05 21:18:25,521 INFO L78 Accepts]: Start accepts. Automaton has 64188 states and 254635 transitions. Word has length 25 [2021-06-05 21:18:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:25,521 INFO L482 AbstractCegarLoop]: Abstraction has 64188 states and 254635 transitions. [2021-06-05 21:18:25,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:25,521 INFO L276 IsEmpty]: Start isEmpty. Operand 64188 states and 254635 transitions. [2021-06-05 21:18:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:25,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:25,627 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:25,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:25,827 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:25,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:25,828 INFO L82 PathProgramCache]: Analyzing trace with hash 267542668, now seen corresponding path program 25 times [2021-06-05 21:18:25,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:25,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785758052] [2021-06-05 21:18:25,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:25,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:25,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785758052] [2021-06-05 21:18:25,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785758052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:25,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838397646] [2021-06-05 21:18:25,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:18:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:25,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:18:25,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:25,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838397646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:25,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:25,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 21:18:25,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045817504] [2021-06-05 21:18:25,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 21:18:25,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:25,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 21:18:25,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 21:18:25,919 INFO L87 Difference]: Start difference. First operand 64188 states and 254635 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:26,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:26,375 INFO L93 Difference]: Finished difference Result 76364 states and 293526 transitions. [2021-06-05 21:18:26,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:26,375 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:18:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:26,922 INFO L225 Difference]: With dead ends: 76364 [2021-06-05 21:18:26,922 INFO L226 Difference]: Without dead ends: 76346 [2021-06-05 21:18:26,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:18:26,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76346 states. [2021-06-05 21:18:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76346 to 64118. [2021-06-05 21:18:28,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64118 states, 64117 states have (on average 3.9665143409704133) internal successors, (254321), 64117 states have internal predecessors, (254321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64118 states to 64118 states and 254321 transitions. [2021-06-05 21:18:28,403 INFO L78 Accepts]: Start accepts. Automaton has 64118 states and 254321 transitions. Word has length 25 [2021-06-05 21:18:28,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:28,403 INFO L482 AbstractCegarLoop]: Abstraction has 64118 states and 254321 transitions. [2021-06-05 21:18:28,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 64118 states and 254321 transitions. [2021-06-05 21:18:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:28,508 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:28,508 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:28,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 21:18:28,708 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:28,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:28,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1076367576, now seen corresponding path program 26 times [2021-06-05 21:18:28,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:28,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645463786] [2021-06-05 21:18:28,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:28,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:28,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645463786] [2021-06-05 21:18:28,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645463786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:28,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332734979] [2021-06-05 21:18:28,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:18:28,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:28,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:28,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:18:28,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:28,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332734979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:28,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:28,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 21:18:28,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774935493] [2021-06-05 21:18:28,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:18:28,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:28,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:18:28,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:18:28,814 INFO L87 Difference]: Start difference. First operand 64118 states and 254321 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 21:18:29,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:29,307 INFO L93 Difference]: Finished difference Result 78562 states and 304991 transitions. [2021-06-05 21:18:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:29,307 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 25 [2021-06-05 21:18:29,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:29,834 INFO L225 Difference]: With dead ends: 78562 [2021-06-05 21:18:29,834 INFO L226 Difference]: Without dead ends: 78541 [2021-06-05 21:18:29,834 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-06-05 21:18:29,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78541 states. [2021-06-05 21:18:31,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78541 to 68474. [2021-06-05 21:18:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68474 states, 68473 states have (on average 3.9671841455756285) internal successors, (271645), 68473 states have internal predecessors, (271645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:31,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68474 states to 68474 states and 271645 transitions. [2021-06-05 21:18:31,455 INFO L78 Accepts]: Start accepts. Automaton has 68474 states and 271645 transitions. Word has length 25 [2021-06-05 21:18:31,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:31,455 INFO L482 AbstractCegarLoop]: Abstraction has 68474 states and 271645 transitions. [2021-06-05 21:18:31,455 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 21:18:31,455 INFO L276 IsEmpty]: Start isEmpty. Operand 68474 states and 271645 transitions. [2021-06-05 21:18:31,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:31,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:31,570 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:31,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 21:18:31,773 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:31,773 INFO L82 PathProgramCache]: Analyzing trace with hash -525935788, now seen corresponding path program 27 times [2021-06-05 21:18:31,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:31,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250824099] [2021-06-05 21:18:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:18:31,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:31,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250824099] [2021-06-05 21:18:31,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250824099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:31,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679341183] [2021-06-05 21:18:31,801 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 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 21:18:31,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:18:31,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:31,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:18:31,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:31,922 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:31,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679341183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:31,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:31,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:18:31,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117004639] [2021-06-05 21:18:31,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:31,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:31,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:31,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:31,923 INFO L87 Difference]: Start difference. First operand 68474 states and 271645 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:18:32,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:32,990 INFO L93 Difference]: Finished difference Result 70511 states and 277156 transitions. [2021-06-05 21:18:32,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 21:18:32,991 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:18:32,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:33,224 INFO L225 Difference]: With dead ends: 70511 [2021-06-05 21:18:33,224 INFO L226 Difference]: Without dead ends: 70469 [2021-06-05 21:18:33,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 378.1ms TimeCoverageRelationStatistics Valid=308, Invalid=1024, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:18:33,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70469 states. [2021-06-05 21:18:34,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70469 to 68722. [2021-06-05 21:18:34,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68722 states, 68721 states have (on average 3.9638392922105323) internal successors, (272399), 68721 states have internal predecessors, (272399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68722 states to 68722 states and 272399 transitions. [2021-06-05 21:18:34,768 INFO L78 Accepts]: Start accepts. Automaton has 68722 states and 272399 transitions. Word has length 25 [2021-06-05 21:18:34,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:34,768 INFO L482 AbstractCegarLoop]: Abstraction has 68722 states and 272399 transitions. [2021-06-05 21:18:34,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:18:34,768 INFO L276 IsEmpty]: Start isEmpty. Operand 68722 states and 272399 transitions. [2021-06-05 21:18:34,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:34,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:34,880 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:35,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2021-06-05 21:18:35,088 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:35,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:35,088 INFO L82 PathProgramCache]: Analyzing trace with hash 130107116, now seen corresponding path program 28 times [2021-06-05 21:18:35,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:35,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070111119] [2021-06-05 21:18:35,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:35,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:35,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070111119] [2021-06-05 21:18:35,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070111119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:35,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100726448] [2021-06-05 21:18:35,114 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 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 21:18:35,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:35,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:35,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 21:18:35,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:35,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100726448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:35,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:35,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:18:35,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260491345] [2021-06-05 21:18:35,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:18:35,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:35,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:18:35,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:18:35,207 INFO L87 Difference]: Start difference. First operand 68722 states and 272399 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:36,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:36,060 INFO L93 Difference]: Finished difference Result 76782 states and 298131 transitions. [2021-06-05 21:18:36,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 21:18:36,060 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:18:36,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:36,292 INFO L225 Difference]: With dead ends: 76782 [2021-06-05 21:18:36,293 INFO L226 Difference]: Without dead ends: 76761 [2021-06-05 21:18:36,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-06-05 21:18:36,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76761 states. [2021-06-05 21:18:37,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76761 to 68563. [2021-06-05 21:18:37,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68563 states, 68562 states have (on average 3.9605612438376943) internal successors, (271544), 68562 states have internal predecessors, (271544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:37,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68563 states to 68563 states and 271544 transitions. [2021-06-05 21:18:37,865 INFO L78 Accepts]: Start accepts. Automaton has 68563 states and 271544 transitions. Word has length 25 [2021-06-05 21:18:37,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:37,865 INFO L482 AbstractCegarLoop]: Abstraction has 68563 states and 271544 transitions. [2021-06-05 21:18:37,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:37,865 INFO L276 IsEmpty]: Start isEmpty. Operand 68563 states and 271544 transitions. [2021-06-05 21:18:37,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:37,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:37,977 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:38,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:38,178 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:38,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1963061844, now seen corresponding path program 29 times [2021-06-05 21:18:38,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:38,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115319952] [2021-06-05 21:18:38,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:38,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:38,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115319952] [2021-06-05 21:18:38,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115319952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:38,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210747168] [2021-06-05 21:18:38,210 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 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 21:18:38,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:18:38,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:38,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:18:38,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:38,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210747168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:38,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:38,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:18:38,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359487013] [2021-06-05 21:18:38,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:18:38,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:38,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:18:38,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:38,336 INFO L87 Difference]: Start difference. First operand 68563 states and 271544 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:39,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:39,484 INFO L93 Difference]: Finished difference Result 70153 states and 275739 transitions. [2021-06-05 21:18:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:18:39,484 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:18:39,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:39,673 INFO L225 Difference]: With dead ends: 70153 [2021-06-05 21:18:39,674 INFO L226 Difference]: Without dead ends: 70079 [2021-06-05 21:18:39,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=303, Invalid=1029, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 21:18:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70079 states. [2021-06-05 21:18:40,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70079 to 68697. [2021-06-05 21:18:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68697 states, 68696 states have (on average 3.9588767904972633) internal successors, (271959), 68696 states have internal predecessors, (271959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:41,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68697 states to 68697 states and 271959 transitions. [2021-06-05 21:18:41,213 INFO L78 Accepts]: Start accepts. Automaton has 68697 states and 271959 transitions. Word has length 25 [2021-06-05 21:18:41,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:41,213 INFO L482 AbstractCegarLoop]: Abstraction has 68697 states and 271959 transitions. [2021-06-05 21:18:41,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:41,213 INFO L276 IsEmpty]: Start isEmpty. Operand 68697 states and 271959 transitions. [2021-06-05 21:18:41,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:41,327 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:41,327 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:41,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:41,528 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:41,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:41,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2056806376, now seen corresponding path program 98 times [2021-06-05 21:18:41,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:41,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067582156] [2021-06-05 21:18:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:41,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:41,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067582156] [2021-06-05 21:18:41,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067582156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:41,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290051789] [2021-06-05 21:18:41,568 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 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 21:18:41,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:18:41,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:41,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:18:41,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:41,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:41,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290051789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:41,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:41,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:18:41,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217448665] [2021-06-05 21:18:41,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:41,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:41,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:41,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:41,682 INFO L87 Difference]: Start difference. First operand 68697 states and 271959 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:18:43,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:43,009 INFO L93 Difference]: Finished difference Result 86344 states and 334372 transitions. [2021-06-05 21:18:43,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:18:43,009 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:18:43,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:43,237 INFO L225 Difference]: With dead ends: 86344 [2021-06-05 21:18:43,237 INFO L226 Difference]: Without dead ends: 86320 [2021-06-05 21:18:43,238 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 580.4ms TimeCoverageRelationStatistics Valid=445, Invalid=1717, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 21:18:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86320 states. [2021-06-05 21:18:44,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86320 to 68709. [2021-06-05 21:18:44,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68709 states, 68708 states have (on average 3.958665657565349) internal successors, (271992), 68708 states have internal predecessors, (271992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68709 states to 68709 states and 271992 transitions. [2021-06-05 21:18:44,923 INFO L78 Accepts]: Start accepts. Automaton has 68709 states and 271992 transitions. Word has length 25 [2021-06-05 21:18:44,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:44,923 INFO L482 AbstractCegarLoop]: Abstraction has 68709 states and 271992 transitions. [2021-06-05 21:18:44,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:18:44,923 INFO L276 IsEmpty]: Start isEmpty. Operand 68709 states and 271992 transitions. [2021-06-05 21:18:45,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:45,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:45,390 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:45,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 21:18:45,590 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:45,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:45,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1316458780, now seen corresponding path program 99 times [2021-06-05 21:18:45,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:45,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666020719] [2021-06-05 21:18:45,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:45,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:45,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666020719] [2021-06-05 21:18:45,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666020719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:45,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744254530] [2021-06-05 21:18:45,629 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 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 21:18:45,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:18:45,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:45,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:18:45,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:45,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744254530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:45,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:45,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:18:45,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561168192] [2021-06-05 21:18:45,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:45,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:45,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:45,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:45,756 INFO L87 Difference]: Start difference. First operand 68709 states and 271992 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:18:47,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:47,044 INFO L93 Difference]: Finished difference Result 92186 states and 352383 transitions. [2021-06-05 21:18:47,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 21:18:47,044 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:18:47,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:47,281 INFO L225 Difference]: With dead ends: 92186 [2021-06-05 21:18:47,281 INFO L226 Difference]: Without dead ends: 92174 [2021-06-05 21:18:47,282 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 736.4ms TimeCoverageRelationStatistics Valid=643, Invalid=2549, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 21:18:47,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92174 states. [2021-06-05 21:18:48,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92174 to 68716. [2021-06-05 21:18:48,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68716 states, 68715 states have (on average 3.9585825511169324) internal successors, (272014), 68715 states have internal predecessors, (272014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:49,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68716 states to 68716 states and 272014 transitions. [2021-06-05 21:18:49,162 INFO L78 Accepts]: Start accepts. Automaton has 68716 states and 272014 transitions. Word has length 25 [2021-06-05 21:18:49,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:49,163 INFO L482 AbstractCegarLoop]: Abstraction has 68716 states and 272014 transitions. [2021-06-05 21:18:49,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:18:49,163 INFO L276 IsEmpty]: Start isEmpty. Operand 68716 states and 272014 transitions. [2021-06-05 21:18:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:49,276 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:49,276 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:49,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:49,477 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:49,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:49,477 INFO L82 PathProgramCache]: Analyzing trace with hash -337901336, now seen corresponding path program 100 times [2021-06-05 21:18:49,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:49,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264093674] [2021-06-05 21:18:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:49,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:49,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264093674] [2021-06-05 21:18:49,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264093674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:49,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879793181] [2021-06-05 21:18:49,518 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 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 21:18:49,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:18:49,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:49,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:18:49,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:49,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879793181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:49,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:49,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:18:49,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683073043] [2021-06-05 21:18:49,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:18:49,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:49,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:18:49,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:18:49,634 INFO L87 Difference]: Start difference. First operand 68716 states and 272014 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 21:18:51,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:51,276 INFO L93 Difference]: Finished difference Result 95964 states and 365708 transitions. [2021-06-05 21:18:51,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 21:18:51,277 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 25 [2021-06-05 21:18:51,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:51,533 INFO L225 Difference]: With dead ends: 95964 [2021-06-05 21:18:51,534 INFO L226 Difference]: Without dead ends: 95943 [2021-06-05 21:18:51,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 750.6ms TimeCoverageRelationStatistics Valid=637, Invalid=2333, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 21:18:51,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95943 states. [2021-06-05 21:18:53,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95943 to 68734. [2021-06-05 21:18:53,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68734 states, 68733 states have (on average 3.9582151222847832) internal successors, (272060), 68733 states have internal predecessors, (272060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68734 states to 68734 states and 272060 transitions. [2021-06-05 21:18:53,738 INFO L78 Accepts]: Start accepts. Automaton has 68734 states and 272060 transitions. Word has length 25 [2021-06-05 21:18:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:53,738 INFO L482 AbstractCegarLoop]: Abstraction has 68734 states and 272060 transitions. [2021-06-05 21:18:53,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 21:18:53,738 INFO L276 IsEmpty]: Start isEmpty. Operand 68734 states and 272060 transitions. [2021-06-05 21:18:53,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:53,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:53,852 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:54,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2021-06-05 21:18:54,053 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:54,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:54,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1109129320, now seen corresponding path program 30 times [2021-06-05 21:18:54,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:54,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923267784] [2021-06-05 21:18:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:54,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:54,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923267784] [2021-06-05 21:18:54,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923267784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:54,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119774145] [2021-06-05 21:18:54,099 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 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 21:18:54,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:18:54,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:18:54,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:18:54,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:54,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119774145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:54,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:54,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:18:54,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340502266] [2021-06-05 21:18:54,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:18:54,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:54,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:18:54,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:54,220 INFO L87 Difference]: Start difference. First operand 68734 states and 272060 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:54,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:54,821 INFO L93 Difference]: Finished difference Result 69170 states and 273198 transitions. [2021-06-05 21:18:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:18:54,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:18:54,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:55,006 INFO L225 Difference]: With dead ends: 69170 [2021-06-05 21:18:55,006 INFO L226 Difference]: Without dead ends: 69170 [2021-06-05 21:18:55,006 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 234.8ms TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-06-05 21:18:55,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69170 states. [2021-06-05 21:18:56,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69170 to 68750. [2021-06-05 21:18:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68750 states, 68749 states have (on average 3.9579339335844885) internal successors, (272104), 68749 states have internal predecessors, (272104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:56,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68750 states to 68750 states and 272104 transitions. [2021-06-05 21:18:56,865 INFO L78 Accepts]: Start accepts. Automaton has 68750 states and 272104 transitions. Word has length 25 [2021-06-05 21:18:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:56,865 INFO L482 AbstractCegarLoop]: Abstraction has 68750 states and 272104 transitions. [2021-06-05 21:18:56,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 68750 states and 272104 transitions. [2021-06-05 21:18:56,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:18:56,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:18:56,980 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:18:57,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:18:57,180 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:18:57,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:18:57,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1906283616, now seen corresponding path program 31 times [2021-06-05 21:18:57,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:18:57,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533254678] [2021-06-05 21:18:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:18:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:57,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:18:57,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533254678] [2021-06-05 21:18:57,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533254678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:57,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099098697] [2021-06-05 21:18:57,218 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 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 21:18:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:18:57,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:18:57,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:18:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:18:57,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099098697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:18:57,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:18:57,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:18:57,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050511256] [2021-06-05 21:18:57,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:18:57,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:18:57,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:18:57,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:18:57,341 INFO L87 Difference]: Start difference. First operand 68750 states and 272104 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:57,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:18:57,984 INFO L93 Difference]: Finished difference Result 69296 states and 273509 transitions. [2021-06-05 21:18:57,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 21:18:57,985 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:18:57,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:18:58,163 INFO L225 Difference]: With dead ends: 69296 [2021-06-05 21:18:58,164 INFO L226 Difference]: Without dead ends: 69296 [2021-06-05 21:18:58,164 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 270.7ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:18:58,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69296 states. [2021-06-05 21:18:59,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69296 to 68742. [2021-06-05 21:18:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68742 states, 68741 states have (on average 3.958103606290278) internal successors, (272084), 68741 states have internal predecessors, (272084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68742 states to 68742 states and 272084 transitions. [2021-06-05 21:18:59,992 INFO L78 Accepts]: Start accepts. Automaton has 68742 states and 272084 transitions. Word has length 25 [2021-06-05 21:18:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:18:59,992 INFO L482 AbstractCegarLoop]: Abstraction has 68742 states and 272084 transitions. [2021-06-05 21:18:59,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:18:59,992 INFO L276 IsEmpty]: Start isEmpty. Operand 68742 states and 272084 transitions. [2021-06-05 21:19:00,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:00,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:00,106 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:00,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:00,307 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:00,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:00,307 INFO L82 PathProgramCache]: Analyzing trace with hash 819946400, now seen corresponding path program 32 times [2021-06-05 21:19:00,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:00,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865308099] [2021-06-05 21:19:00,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:00,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:00,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865308099] [2021-06-05 21:19:00,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865308099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:00,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611132899] [2021-06-05 21:19:00,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:19:00,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:00,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:00,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:19:00,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:00,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611132899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:00,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:00,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:19:00,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484527006] [2021-06-05 21:19:00,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:00,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:00,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:00,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:00,479 INFO L87 Difference]: Start difference. First operand 68742 states and 272084 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:01,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:01,169 INFO L93 Difference]: Finished difference Result 69843 states and 274981 transitions. [2021-06-05 21:19:01,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:19:01,169 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:19:01,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:01,348 INFO L225 Difference]: With dead ends: 69843 [2021-06-05 21:19:01,348 INFO L226 Difference]: Without dead ends: 69843 [2021-06-05 21:19:01,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 310.6ms TimeCoverageRelationStatistics Valid=262, Invalid=928, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 21:19:01,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69843 states. [2021-06-05 21:19:02,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69843 to 68778. [2021-06-05 21:19:02,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68778 states, 68777 states have (on average 3.9577184233101184) internal successors, (272200), 68777 states have internal predecessors, (272200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68778 states to 68778 states and 272200 transitions. [2021-06-05 21:19:03,106 INFO L78 Accepts]: Start accepts. Automaton has 68778 states and 272200 transitions. Word has length 25 [2021-06-05 21:19:03,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:03,107 INFO L482 AbstractCegarLoop]: Abstraction has 68778 states and 272200 transitions. [2021-06-05 21:19:03,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:03,107 INFO L276 IsEmpty]: Start isEmpty. Operand 68778 states and 272200 transitions. [2021-06-05 21:19:03,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:03,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:03,218 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:03,419 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 21:19:03,419 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:03,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:03,419 INFO L82 PathProgramCache]: Analyzing trace with hash 693070752, now seen corresponding path program 33 times [2021-06-05 21:19:03,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:03,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234704510] [2021-06-05 21:19:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:03,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:03,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:03,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234704510] [2021-06-05 21:19:03,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234704510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:03,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224684738] [2021-06-05 21:19:03,457 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 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 21:19:03,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:19:03,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:03,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:19:03,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:03,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224684738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:03,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:03,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:19:03,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512805442] [2021-06-05 21:19:03,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:03,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:03,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:03,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:03,581 INFO L87 Difference]: Start difference. First operand 68778 states and 272200 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:04,217 INFO L93 Difference]: Finished difference Result 69573 states and 274270 transitions. [2021-06-05 21:19:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:19:04,218 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:19:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:04,398 INFO L225 Difference]: With dead ends: 69573 [2021-06-05 21:19:04,398 INFO L226 Difference]: Without dead ends: 69566 [2021-06-05 21:19:04,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:19:04,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69566 states. [2021-06-05 21:19:05,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69566 to 68778. [2021-06-05 21:19:05,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68778 states, 68777 states have (on average 3.9576893438213356) internal successors, (272198), 68777 states have internal predecessors, (272198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:06,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68778 states to 68778 states and 272198 transitions. [2021-06-05 21:19:06,195 INFO L78 Accepts]: Start accepts. Automaton has 68778 states and 272198 transitions. Word has length 25 [2021-06-05 21:19:06,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:06,195 INFO L482 AbstractCegarLoop]: Abstraction has 68778 states and 272198 transitions. [2021-06-05 21:19:06,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:06,195 INFO L276 IsEmpty]: Start isEmpty. Operand 68778 states and 272198 transitions. [2021-06-05 21:19:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:06,316 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:06,316 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:06,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 21:19:06,516 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:06,516 INFO L82 PathProgramCache]: Analyzing trace with hash -1193560492, now seen corresponding path program 34 times [2021-06-05 21:19:06,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:06,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067451112] [2021-06-05 21:19:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:06,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:06,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:06,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067451112] [2021-06-05 21:19:06,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067451112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:06,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966318119] [2021-06-05 21:19:06,549 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 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 21:19:06,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:06,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:06,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:19:06,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:06,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966318119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:06,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:06,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:19:06,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608446163] [2021-06-05 21:19:06,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:06,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:06,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:06,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:06,670 INFO L87 Difference]: Start difference. First operand 68778 states and 272198 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:07,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:07,789 INFO L93 Difference]: Finished difference Result 70623 states and 277143 transitions. [2021-06-05 21:19:07,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 21:19:07,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:19:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:08,172 INFO L225 Difference]: With dead ends: 70623 [2021-06-05 21:19:08,172 INFO L226 Difference]: Without dead ends: 70615 [2021-06-05 21:19:08,172 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 21:19:08,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70615 states. [2021-06-05 21:19:09,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70615 to 68818. [2021-06-05 21:19:09,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68818 states, 68817 states have (on average 3.957132685237659) internal successors, (272318), 68817 states have internal predecessors, (272318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68818 states to 68818 states and 272318 transitions. [2021-06-05 21:19:09,950 INFO L78 Accepts]: Start accepts. Automaton has 68818 states and 272318 transitions. Word has length 25 [2021-06-05 21:19:09,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:09,950 INFO L482 AbstractCegarLoop]: Abstraction has 68818 states and 272318 transitions. [2021-06-05 21:19:09,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:09,950 INFO L276 IsEmpty]: Start isEmpty. Operand 68818 states and 272318 transitions. [2021-06-05 21:19:10,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:10,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:10,065 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:10,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 21:19:10,266 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:10,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1320436140, now seen corresponding path program 35 times [2021-06-05 21:19:10,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:10,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561631807] [2021-06-05 21:19:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:19:10,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:10,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561631807] [2021-06-05 21:19:10,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561631807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:10,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43126565] [2021-06-05 21:19:10,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:19:10,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:19:10,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:10,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:19:10,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:10,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43126565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:10,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:10,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:19:10,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522219408] [2021-06-05 21:19:10,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:10,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:10,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:10,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:10,437 INFO L87 Difference]: Start difference. First operand 68818 states and 272318 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:19:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:11,471 INFO L93 Difference]: Finished difference Result 70377 states and 276470 transitions. [2021-06-05 21:19:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:19:11,485 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:19:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:11,685 INFO L225 Difference]: With dead ends: 70377 [2021-06-05 21:19:11,685 INFO L226 Difference]: Without dead ends: 70363 [2021-06-05 21:19:11,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 293.7ms TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:19:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70363 states. [2021-06-05 21:19:12,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70363 to 68786. [2021-06-05 21:19:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68786 states, 68785 states have (on average 3.9574907319909864) internal successors, (272216), 68785 states have internal predecessors, (272216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:13,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68786 states to 68786 states and 272216 transitions. [2021-06-05 21:19:13,158 INFO L78 Accepts]: Start accepts. Automaton has 68786 states and 272216 transitions. Word has length 25 [2021-06-05 21:19:13,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:13,158 INFO L482 AbstractCegarLoop]: Abstraction has 68786 states and 272216 transitions. [2021-06-05 21:19:13,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:19:13,158 INFO L276 IsEmpty]: Start isEmpty. Operand 68786 states and 272216 transitions. [2021-06-05 21:19:13,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:13,271 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:13,271 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:13,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 21:19:13,471 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:13,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:13,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1138256728, now seen corresponding path program 36 times [2021-06-05 21:19:13,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:13,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017212278] [2021-06-05 21:19:13,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:13,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:13,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017212278] [2021-06-05 21:19:13,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017212278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:13,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388025576] [2021-06-05 21:19:13,508 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 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 21:19:13,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:19:13,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:13,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:19:13,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:13,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388025576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:13,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:13,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:19:13,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938543765] [2021-06-05 21:19:13,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:13,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:13,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:13,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:13,633 INFO L87 Difference]: Start difference. First operand 68786 states and 272216 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:14,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:14,667 INFO L93 Difference]: Finished difference Result 69992 states and 275361 transitions. [2021-06-05 21:19:14,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:19:14,667 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:19:14,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:14,854 INFO L225 Difference]: With dead ends: 69992 [2021-06-05 21:19:14,854 INFO L226 Difference]: Without dead ends: 69950 [2021-06-05 21:19:14,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:19:14,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69950 states. [2021-06-05 21:19:16,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69950 to 68734. [2021-06-05 21:19:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68734 states, 68733 states have (on average 3.9581860241805247) internal successors, (272058), 68733 states have internal predecessors, (272058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:16,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68734 states to 68734 states and 272058 transitions. [2021-06-05 21:19:16,355 INFO L78 Accepts]: Start accepts. Automaton has 68734 states and 272058 transitions. Word has length 25 [2021-06-05 21:19:16,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:16,355 INFO L482 AbstractCegarLoop]: Abstraction has 68734 states and 272058 transitions. [2021-06-05 21:19:16,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:16,355 INFO L276 IsEmpty]: Start isEmpty. Operand 68734 states and 272058 transitions. [2021-06-05 21:19:16,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:16,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:16,472 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:16,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-05 21:19:16,672 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:16,673 INFO L82 PathProgramCache]: Analyzing trace with hash 586655720, now seen corresponding path program 101 times [2021-06-05 21:19:16,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:16,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186573861] [2021-06-05 21:19:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:16,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:16,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186573861] [2021-06-05 21:19:16,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186573861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:16,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648770218] [2021-06-05 21:19:16,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:16,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:19:16,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:16,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:19:16,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:16,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648770218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:16,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:16,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:19:16,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814253823] [2021-06-05 21:19:16,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:16,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:16,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:16,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:16,836 INFO L87 Difference]: Start difference. First operand 68734 states and 272058 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:19:18,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:18,299 INFO L93 Difference]: Finished difference Result 90117 states and 348159 transitions. [2021-06-05 21:19:18,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 21:19:18,300 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:19:18,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:18,549 INFO L225 Difference]: With dead ends: 90117 [2021-06-05 21:19:18,549 INFO L226 Difference]: Without dead ends: 90093 [2021-06-05 21:19:18,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 647.3ms TimeCoverageRelationStatistics Valid=506, Invalid=1846, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 21:19:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90093 states. [2021-06-05 21:19:19,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90093 to 68738. [2021-06-05 21:19:20,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68738 states, 68737 states have (on average 3.9580429753989845) internal successors, (272064), 68737 states have internal predecessors, (272064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:20,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68738 states to 68738 states and 272064 transitions. [2021-06-05 21:19:20,249 INFO L78 Accepts]: Start accepts. Automaton has 68738 states and 272064 transitions. Word has length 25 [2021-06-05 21:19:20,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:20,249 INFO L482 AbstractCegarLoop]: Abstraction has 68738 states and 272064 transitions. [2021-06-05 21:19:20,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:19:20,249 INFO L276 IsEmpty]: Start isEmpty. Operand 68738 states and 272064 transitions. [2021-06-05 21:19:20,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:20,690 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:20,690 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:20,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 21:19:20,905 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:20,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:20,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1508357860, now seen corresponding path program 102 times [2021-06-05 21:19:20,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:20,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734832002] [2021-06-05 21:19:20,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:20,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:20,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734832002] [2021-06-05 21:19:20,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734832002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:20,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567717474] [2021-06-05 21:19:20,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:20,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:19:20,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:20,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:19:20,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:21,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567717474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:21,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:21,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:19:21,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785724619] [2021-06-05 21:19:21,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:21,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:21,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:21,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:21,064 INFO L87 Difference]: Start difference. First operand 68738 states and 272064 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:19:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:22,666 INFO L93 Difference]: Finished difference Result 116552 states and 446733 transitions. [2021-06-05 21:19:22,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 21:19:22,667 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:19:22,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:23,258 INFO L225 Difference]: With dead ends: 116552 [2021-06-05 21:19:23,258 INFO L226 Difference]: Without dead ends: 116538 [2021-06-05 21:19:23,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 904.6ms TimeCoverageRelationStatistics Valid=781, Invalid=3251, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 21:19:23,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116538 states. [2021-06-05 21:19:24,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116538 to 69064. [2021-06-05 21:19:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69064 states, 69063 states have (on average 3.9596021024282178) internal successors, (273462), 69063 states have internal predecessors, (273462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69064 states to 69064 states and 273462 transitions. [2021-06-05 21:19:25,116 INFO L78 Accepts]: Start accepts. Automaton has 69064 states and 273462 transitions. Word has length 25 [2021-06-05 21:19:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:25,116 INFO L482 AbstractCegarLoop]: Abstraction has 69064 states and 273462 transitions. [2021-06-05 21:19:25,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:19:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 69064 states and 273462 transitions. [2021-06-05 21:19:25,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:25,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:25,233 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:25,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:25,434 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:25,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:25,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1808051992, now seen corresponding path program 103 times [2021-06-05 21:19:25,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:25,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857354554] [2021-06-05 21:19:25,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:25,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:25,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857354554] [2021-06-05 21:19:25,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857354554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:25,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520075761] [2021-06-05 21:19:25,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:25,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:19:25,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:25,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520075761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:25,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:25,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:19:25,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155314205] [2021-06-05 21:19:25,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:25,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:25,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:25,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:25,596 INFO L87 Difference]: Start difference. First operand 69064 states and 273462 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 21:19:26,064 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2021-06-05 21:19:27,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:27,512 INFO L93 Difference]: Finished difference Result 120318 states and 460657 transitions. [2021-06-05 21:19:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 21:19:27,513 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 25 [2021-06-05 21:19:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:27,863 INFO L225 Difference]: With dead ends: 120318 [2021-06-05 21:19:27,863 INFO L226 Difference]: Without dead ends: 120318 [2021-06-05 21:19:27,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1194.3ms TimeCoverageRelationStatistics Valid=750, Invalid=2910, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 21:19:28,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120318 states. [2021-06-05 21:19:29,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120318 to 69037. [2021-06-05 21:19:29,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69037 states, 69036 states have (on average 3.9593690248565965) internal successors, (273339), 69036 states have internal predecessors, (273339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:30,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69037 states to 69037 states and 273339 transitions. [2021-06-05 21:19:30,040 INFO L78 Accepts]: Start accepts. Automaton has 69037 states and 273339 transitions. Word has length 25 [2021-06-05 21:19:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:30,040 INFO L482 AbstractCegarLoop]: Abstraction has 69037 states and 273339 transitions. [2021-06-05 21:19:30,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 21:19:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 69037 states and 273339 transitions. [2021-06-05 21:19:30,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:30,154 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:30,154 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:30,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 21:19:30,354 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:30,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:30,354 INFO L82 PathProgramCache]: Analyzing trace with hash -813211544, now seen corresponding path program 37 times [2021-06-05 21:19:30,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:30,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038121702] [2021-06-05 21:19:30,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:30,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:30,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038121702] [2021-06-05 21:19:30,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038121702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:30,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053988881] [2021-06-05 21:19:30,395 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 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 21:19:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:30,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:19:30,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:30,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053988881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:30,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:30,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:19:30,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056996815] [2021-06-05 21:19:30,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:30,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:30,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:30,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:30,513 INFO L87 Difference]: Start difference. First operand 69037 states and 273339 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:31,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:31,412 INFO L93 Difference]: Finished difference Result 69425 states and 274395 transitions. [2021-06-05 21:19:31,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:19:31,413 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:19:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:31,608 INFO L225 Difference]: With dead ends: 69425 [2021-06-05 21:19:31,608 INFO L226 Difference]: Without dead ends: 69425 [2021-06-05 21:19:31,609 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:31,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69425 states. [2021-06-05 21:19:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69425 to 69083. [2021-06-05 21:19:32,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69083 states, 69082 states have (on average 3.958773631336672) internal successors, (273480), 69082 states have internal predecessors, (273480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:33,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69083 states to 69083 states and 273480 transitions. [2021-06-05 21:19:33,118 INFO L78 Accepts]: Start accepts. Automaton has 69083 states and 273480 transitions. Word has length 25 [2021-06-05 21:19:33,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:33,118 INFO L482 AbstractCegarLoop]: Abstraction has 69083 states and 273480 transitions. [2021-06-05 21:19:33,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:33,118 INFO L276 IsEmpty]: Start isEmpty. Operand 69083 states and 273480 transitions. [2021-06-05 21:19:33,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:33,231 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:33,231 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:33,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:33,432 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:33,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:33,432 INFO L82 PathProgramCache]: Analyzing trace with hash 466342816, now seen corresponding path program 38 times [2021-06-05 21:19:33,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:33,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841120933] [2021-06-05 21:19:33,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:33,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:33,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841120933] [2021-06-05 21:19:33,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841120933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:33,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482594958] [2021-06-05 21:19:33,470 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 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 21:19:33,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:33,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:33,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:19:33,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:33,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482594958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:33,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:33,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:19:33,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836848774] [2021-06-05 21:19:33,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:33,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:33,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:33,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:33,590 INFO L87 Difference]: Start difference. First operand 69083 states and 273480 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:34,623 INFO L93 Difference]: Finished difference Result 69803 states and 275364 transitions. [2021-06-05 21:19:34,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 21:19:34,623 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:19:34,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:34,803 INFO L225 Difference]: With dead ends: 69803 [2021-06-05 21:19:34,803 INFO L226 Difference]: Without dead ends: 69803 [2021-06-05 21:19:34,803 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 294.3ms TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 21:19:34,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69803 states. [2021-06-05 21:19:36,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69803 to 69083. [2021-06-05 21:19:36,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69083 states, 69082 states have (on average 3.958773631336672) internal successors, (273480), 69082 states have internal predecessors, (273480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69083 states to 69083 states and 273480 transitions. [2021-06-05 21:19:36,310 INFO L78 Accepts]: Start accepts. Automaton has 69083 states and 273480 transitions. Word has length 25 [2021-06-05 21:19:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:36,310 INFO L482 AbstractCegarLoop]: Abstraction has 69083 states and 273480 transitions. [2021-06-05 21:19:36,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:36,310 INFO L276 IsEmpty]: Start isEmpty. Operand 69083 states and 273480 transitions. [2021-06-05 21:19:36,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:36,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:36,422 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:36,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:36,623 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:36,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:36,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1102394464, now seen corresponding path program 39 times [2021-06-05 21:19:36,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:36,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986993920] [2021-06-05 21:19:36,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:36,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:36,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986993920] [2021-06-05 21:19:36,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986993920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:36,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353245385] [2021-06-05 21:19:36,663 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 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 21:19:36,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 21:19:36,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:36,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:19:36,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:36,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353245385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:36,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:36,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:19:36,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924693295] [2021-06-05 21:19:36,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:36,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:36,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:36,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:36,788 INFO L87 Difference]: Start difference. First operand 69083 states and 273480 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:37,369 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-06-05 21:19:37,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:37,893 INFO L93 Difference]: Finished difference Result 70326 states and 276764 transitions. [2021-06-05 21:19:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 21:19:37,894 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:19:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:38,075 INFO L225 Difference]: With dead ends: 70326 [2021-06-05 21:19:38,075 INFO L226 Difference]: Without dead ends: 70326 [2021-06-05 21:19:38,075 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 657.2ms TimeCoverageRelationStatistics Valid=343, Invalid=1217, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 21:19:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70326 states. [2021-06-05 21:19:39,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70326 to 69123. [2021-06-05 21:19:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69123 states, 69122 states have (on average 3.958392407627094) internal successors, (273612), 69122 states have internal predecessors, (273612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:39,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69123 states to 69123 states and 273612 transitions. [2021-06-05 21:19:39,602 INFO L78 Accepts]: Start accepts. Automaton has 69123 states and 273612 transitions. Word has length 25 [2021-06-05 21:19:39,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:39,602 INFO L482 AbstractCegarLoop]: Abstraction has 69123 states and 273612 transitions. [2021-06-05 21:19:39,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:39,603 INFO L276 IsEmpty]: Start isEmpty. Operand 69123 states and 273612 transitions. [2021-06-05 21:19:39,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:39,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:39,720 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:39,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:39,920 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:39,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:39,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1229270112, now seen corresponding path program 40 times [2021-06-05 21:19:39,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:39,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144672498] [2021-06-05 21:19:39,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:39,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:39,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:39,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144672498] [2021-06-05 21:19:39,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144672498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:39,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792010833] [2021-06-05 21:19:39,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:19:39,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:39,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:39,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:19:39,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:40,360 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 21:19:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:40,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792010833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:40,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:40,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:19:40,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514286651] [2021-06-05 21:19:40,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:40,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:40,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:40,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:40,384 INFO L87 Difference]: Start difference. First operand 69123 states and 273612 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:41,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:41,105 INFO L93 Difference]: Finished difference Result 69976 states and 275839 transitions. [2021-06-05 21:19:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:19:41,105 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:19:41,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:41,288 INFO L225 Difference]: With dead ends: 69976 [2021-06-05 21:19:41,288 INFO L226 Difference]: Without dead ends: 69969 [2021-06-05 21:19:41,288 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 552.3ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:19:41,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69969 states. [2021-06-05 21:19:42,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69969 to 69041. [2021-06-05 21:19:42,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69041 states, 69040 states have (on average 3.959197566628042) internal successors, (273343), 69040 states have internal predecessors, (273343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:42,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69041 states to 69041 states and 273343 transitions. [2021-06-05 21:19:42,773 INFO L78 Accepts]: Start accepts. Automaton has 69041 states and 273343 transitions. Word has length 25 [2021-06-05 21:19:42,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:42,774 INFO L482 AbstractCegarLoop]: Abstraction has 69041 states and 273343 transitions. [2021-06-05 21:19:42,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:42,774 INFO L276 IsEmpty]: Start isEmpty. Operand 69041 states and 273343 transitions. [2021-06-05 21:19:43,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:43,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:43,131 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:43,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 21:19:43,347 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:43,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:43,347 INFO L82 PathProgramCache]: Analyzing trace with hash -559391772, now seen corresponding path program 41 times [2021-06-05 21:19:43,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:43,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089880210] [2021-06-05 21:19:43,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:43,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:43,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089880210] [2021-06-05 21:19:43,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089880210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:43,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663691422] [2021-06-05 21:19:43,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:43,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:19:43,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:43,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:19:43,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:43,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663691422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:43,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:43,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:19:43,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429513106] [2021-06-05 21:19:43,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:43,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:43,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:43,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:43,505 INFO L87 Difference]: Start difference. First operand 69041 states and 273343 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:44,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:44,017 INFO L93 Difference]: Finished difference Result 69395 states and 274304 transitions. [2021-06-05 21:19:44,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:19:44,018 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:19:44,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:44,211 INFO L225 Difference]: With dead ends: 69395 [2021-06-05 21:19:44,211 INFO L226 Difference]: Without dead ends: 69395 [2021-06-05 21:19:44,211 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-06-05 21:19:44,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69395 states. [2021-06-05 21:19:45,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69395 to 69003. [2021-06-05 21:19:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69003 states, 69002 states have (on average 3.959595374047129) internal successors, (273220), 69002 states have internal predecessors, (273220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:45,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69003 states to 69003 states and 273220 transitions. [2021-06-05 21:19:45,706 INFO L78 Accepts]: Start accepts. Automaton has 69003 states and 273220 transitions. Word has length 25 [2021-06-05 21:19:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:45,706 INFO L482 AbstractCegarLoop]: Abstraction has 69003 states and 273220 transitions. [2021-06-05 21:19:45,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand 69003 states and 273220 transitions. [2021-06-05 21:19:46,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:46,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:46,081 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:46,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:46,282 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:46,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:46,282 INFO L82 PathProgramCache]: Analyzing trace with hash -863069536, now seen corresponding path program 104 times [2021-06-05 21:19:46,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:46,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017138405] [2021-06-05 21:19:46,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:46,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:46,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:46,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017138405] [2021-06-05 21:19:46,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017138405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:46,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475624801] [2021-06-05 21:19:46,325 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 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 21:19:46,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:19:46,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:46,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:19:46,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:46,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475624801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:46,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:46,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-06-05 21:19:46,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143369891] [2021-06-05 21:19:46,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:19:46,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:46,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:19:46,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:19:46,442 INFO L87 Difference]: Start difference. First operand 69003 states and 273220 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:19:47,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:47,227 INFO L93 Difference]: Finished difference Result 85221 states and 330888 transitions. [2021-06-05 21:19:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 21:19:47,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:19:47,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:47,448 INFO L225 Difference]: With dead ends: 85221 [2021-06-05 21:19:47,448 INFO L226 Difference]: Without dead ends: 85193 [2021-06-05 21:19:47,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 354.9ms TimeCoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 21:19:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85193 states. [2021-06-05 21:19:48,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85193 to 68989. [2021-06-05 21:19:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68989 states, 68988 states have (on average 3.959891575346437) internal successors, (273185), 68988 states have internal predecessors, (273185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:49,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68989 states to 68989 states and 273185 transitions. [2021-06-05 21:19:49,409 INFO L78 Accepts]: Start accepts. Automaton has 68989 states and 273185 transitions. Word has length 25 [2021-06-05 21:19:49,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:49,409 INFO L482 AbstractCegarLoop]: Abstraction has 68989 states and 273185 transitions. [2021-06-05 21:19:49,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:19:49,409 INFO L276 IsEmpty]: Start isEmpty. Operand 68989 states and 273185 transitions. [2021-06-05 21:19:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:49,525 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:49,526 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:49,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 21:19:49,726 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:49,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:49,726 INFO L82 PathProgramCache]: Analyzing trace with hash -797437524, now seen corresponding path program 105 times [2021-06-05 21:19:49,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:49,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635317769] [2021-06-05 21:19:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:49,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:49,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:49,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:49,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635317769] [2021-06-05 21:19:49,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635317769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:49,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794474441] [2021-06-05 21:19:49,756 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 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 21:19:49,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:19:49,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:49,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:19:49,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:49,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794474441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:49,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:49,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:19:49,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400154657] [2021-06-05 21:19:49,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:49,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:49,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:49,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:49,869 INFO L87 Difference]: Start difference. First operand 68989 states and 273185 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:51,705 INFO L93 Difference]: Finished difference Result 119328 states and 453987 transitions. [2021-06-05 21:19:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 21:19:51,705 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:19:51,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:52,034 INFO L225 Difference]: With dead ends: 119328 [2021-06-05 21:19:52,034 INFO L226 Difference]: Without dead ends: 119293 [2021-06-05 21:19:52,034 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 794.1ms TimeCoverageRelationStatistics Valid=837, Invalid=2585, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 21:19:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119293 states. [2021-06-05 21:19:53,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119293 to 75170. [2021-06-05 21:19:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75170 states, 75169 states have (on average 3.962750601976879) internal successors, (297876), 75169 states have internal predecessors, (297876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75170 states to 75170 states and 297876 transitions. [2021-06-05 21:19:54,395 INFO L78 Accepts]: Start accepts. Automaton has 75170 states and 297876 transitions. Word has length 25 [2021-06-05 21:19:54,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:54,395 INFO L482 AbstractCegarLoop]: Abstraction has 75170 states and 297876 transitions. [2021-06-05 21:19:54,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:54,395 INFO L276 IsEmpty]: Start isEmpty. Operand 75170 states and 297876 transitions. [2021-06-05 21:19:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:54,524 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:54,524 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:54,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 21:19:54,724 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:54,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:54,724 INFO L82 PathProgramCache]: Analyzing trace with hash 650785256, now seen corresponding path program 106 times [2021-06-05 21:19:54,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:54,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96644991] [2021-06-05 21:19:54,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:54,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:54,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:54,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96644991] [2021-06-05 21:19:54,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96644991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:54,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467291137] [2021-06-05 21:19:54,753 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 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 21:19:54,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:19:54,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:54,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:19:54,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:54,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467291137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:54,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:54,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:19:54,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000334000] [2021-06-05 21:19:54,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:19:54,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:54,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:19:54,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:19:54,870 INFO L87 Difference]: Start difference. First operand 75170 states and 297876 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:56,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:19:56,822 INFO L93 Difference]: Finished difference Result 100461 states and 383370 transitions. [2021-06-05 21:19:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 21:19:56,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:19:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:19:57,090 INFO L225 Difference]: With dead ends: 100461 [2021-06-05 21:19:57,090 INFO L226 Difference]: Without dead ends: 100356 [2021-06-05 21:19:57,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 925.9ms TimeCoverageRelationStatistics Valid=1024, Invalid=3806, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 21:19:57,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100356 states. [2021-06-05 21:19:58,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100356 to 74448. [2021-06-05 21:19:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74448 states, 74447 states have (on average 3.9613416255859875) internal successors, (294910), 74447 states have internal predecessors, (294910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:59,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74448 states to 74448 states and 294910 transitions. [2021-06-05 21:19:59,306 INFO L78 Accepts]: Start accepts. Automaton has 74448 states and 294910 transitions. Word has length 25 [2021-06-05 21:19:59,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:19:59,306 INFO L482 AbstractCegarLoop]: Abstraction has 74448 states and 294910 transitions. [2021-06-05 21:19:59,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:19:59,307 INFO L276 IsEmpty]: Start isEmpty. Operand 74448 states and 294910 transitions. [2021-06-05 21:19:59,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:19:59,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:19:59,442 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:19:59,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:19:59,643 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:19:59,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:19:59,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1063817676, now seen corresponding path program 42 times [2021-06-05 21:19:59,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:19:59,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928594869] [2021-06-05 21:19:59,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:19:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:19:59,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:59,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:19:59,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928594869] [2021-06-05 21:19:59,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928594869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:59,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967137433] [2021-06-05 21:19:59,674 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 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 21:19:59,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:19:59,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:19:59,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:19:59,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:19:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:19:59,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967137433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:19:59,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:19:59,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:19:59,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884892736] [2021-06-05 21:19:59,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:19:59,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:19:59,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:19:59,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:19:59,796 INFO L87 Difference]: Start difference. First operand 74448 states and 294910 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:01,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:01,106 INFO L93 Difference]: Finished difference Result 77100 states and 301893 transitions. [2021-06-05 21:20:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 21:20:01,107 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:20:01,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:01,624 INFO L225 Difference]: With dead ends: 77100 [2021-06-05 21:20:01,624 INFO L226 Difference]: Without dead ends: 77088 [2021-06-05 21:20:01,625 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 765.8ms TimeCoverageRelationStatistics Valid=938, Invalid=2602, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 21:20:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77088 states. [2021-06-05 21:20:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77088 to 74708. [2021-06-05 21:20:02,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74708 states, 74707 states have (on average 3.958263616528572) internal successors, (295710), 74707 states have internal predecessors, (295710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:03,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74708 states to 74708 states and 295710 transitions. [2021-06-05 21:20:03,171 INFO L78 Accepts]: Start accepts. Automaton has 74708 states and 295710 transitions. Word has length 25 [2021-06-05 21:20:03,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:03,171 INFO L482 AbstractCegarLoop]: Abstraction has 74708 states and 295710 transitions. [2021-06-05 21:20:03,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:03,171 INFO L276 IsEmpty]: Start isEmpty. Operand 74708 states and 295710 transitions. [2021-06-05 21:20:03,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:20:03,299 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:03,299 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:03,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 21:20:03,499 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:03,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:03,499 INFO L82 PathProgramCache]: Analyzing trace with hash -631795252, now seen corresponding path program 43 times [2021-06-05 21:20:03,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:03,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660874124] [2021-06-05 21:20:03,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:03,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:03,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660874124] [2021-06-05 21:20:03,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660874124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:03,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873304149] [2021-06-05 21:20:03,526 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:03,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:20:03,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:03,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873304149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:03,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:03,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:20:03,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167664493] [2021-06-05 21:20:03,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:20:03,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:03,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:20:03,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:20:03,649 INFO L87 Difference]: Start difference. First operand 74708 states and 295710 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:20:05,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:05,259 INFO L93 Difference]: Finished difference Result 76474 states and 300187 transitions. [2021-06-05 21:20:05,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 21:20:05,259 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:20:05,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:05,490 INFO L225 Difference]: With dead ends: 76474 [2021-06-05 21:20:05,491 INFO L226 Difference]: Without dead ends: 76460 [2021-06-05 21:20:05,491 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 707.8ms TimeCoverageRelationStatistics Valid=760, Invalid=2320, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 21:20:05,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76460 states. [2021-06-05 21:20:06,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76460 to 74576. [2021-06-05 21:20:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74576 states, 74575 states have (on average 3.959557492457258) internal successors, (295284), 74575 states have internal predecessors, (295284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:07,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74576 states to 74576 states and 295284 transitions. [2021-06-05 21:20:07,251 INFO L78 Accepts]: Start accepts. Automaton has 74576 states and 295284 transitions. Word has length 25 [2021-06-05 21:20:07,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:07,251 INFO L482 AbstractCegarLoop]: Abstraction has 74576 states and 295284 transitions. [2021-06-05 21:20:07,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:20:07,251 INFO L276 IsEmpty]: Start isEmpty. Operand 74576 states and 295284 transitions. [2021-06-05 21:20:07,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:20:07,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:07,387 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:07,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 21:20:07,587 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:07,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:07,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1261594988, now seen corresponding path program 44 times [2021-06-05 21:20:07,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:07,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692913364] [2021-06-05 21:20:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:07,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:07,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692913364] [2021-06-05 21:20:07,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692913364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:07,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822905390] [2021-06-05 21:20:07,614 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:07,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:07,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:07,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:20:07,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:08,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822905390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:08,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:08,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:20:08,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599114024] [2021-06-05 21:20:08,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:20:08,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:08,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:20:08,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:20:08,076 INFO L87 Difference]: Start difference. First operand 74576 states and 295284 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:20:09,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:09,120 INFO L93 Difference]: Finished difference Result 76116 states and 299340 transitions. [2021-06-05 21:20:09,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 21:20:09,120 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:20:09,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:09,325 INFO L225 Difference]: With dead ends: 76116 [2021-06-05 21:20:09,325 INFO L226 Difference]: Without dead ends: 76074 [2021-06-05 21:20:09,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 855.6ms TimeCoverageRelationStatistics Valid=533, Invalid=1723, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 21:20:09,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76074 states. [2021-06-05 21:20:10,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76074 to 74576. [2021-06-05 21:20:10,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74576 states, 74575 states have (on average 3.9595038551793498) internal successors, (295280), 74575 states have internal predecessors, (295280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:11,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74576 states to 74576 states and 295280 transitions. [2021-06-05 21:20:11,299 INFO L78 Accepts]: Start accepts. Automaton has 74576 states and 295280 transitions. Word has length 25 [2021-06-05 21:20:11,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:11,299 INFO L482 AbstractCegarLoop]: Abstraction has 74576 states and 295280 transitions. [2021-06-05 21:20:11,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:20:11,299 INFO L276 IsEmpty]: Start isEmpty. Operand 74576 states and 295280 transitions. [2021-06-05 21:20:11,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:20:11,428 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:11,428 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:11,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:11,629 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:11,629 INFO L82 PathProgramCache]: Analyzing trace with hash -938636140, now seen corresponding path program 45 times [2021-06-05 21:20:11,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:11,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364636394] [2021-06-05 21:20:11,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:11,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:11,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364636394] [2021-06-05 21:20:11,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364636394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:11,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439358572] [2021-06-05 21:20:11,662 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:11,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:20:11,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:11,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:20:11,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:11,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439358572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:11,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:11,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:20:11,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629966772] [2021-06-05 21:20:11,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:11,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:11,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:11,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:11,789 INFO L87 Difference]: Start difference. First operand 74576 states and 295280 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:12,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:12,697 INFO L93 Difference]: Finished difference Result 76951 states and 301689 transitions. [2021-06-05 21:20:12,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 21:20:12,697 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:20:12,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:12,910 INFO L225 Difference]: With dead ends: 76951 [2021-06-05 21:20:12,910 INFO L226 Difference]: Without dead ends: 76877 [2021-06-05 21:20:12,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=420, Invalid=1472, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 21:20:13,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76877 states. [2021-06-05 21:20:14,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76877 to 74732. [2021-06-05 21:20:14,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74732 states, 74731 states have (on average 3.957313564651885) internal successors, (295734), 74731 states have internal predecessors, (295734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:14,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74732 states to 74732 states and 295734 transitions. [2021-06-05 21:20:14,912 INFO L78 Accepts]: Start accepts. Automaton has 74732 states and 295734 transitions. Word has length 25 [2021-06-05 21:20:14,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:14,912 INFO L482 AbstractCegarLoop]: Abstraction has 74732 states and 295734 transitions. [2021-06-05 21:20:14,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:14,912 INFO L276 IsEmpty]: Start isEmpty. Operand 74732 states and 295734 transitions. [2021-06-05 21:20:15,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:20:15,053 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:15,053 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:15,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:15,268 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:15,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:15,269 INFO L82 PathProgramCache]: Analyzing trace with hash -801593656, now seen corresponding path program 46 times [2021-06-05 21:20:15,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:15,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627092374] [2021-06-05 21:20:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:15,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:15,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627092374] [2021-06-05 21:20:15,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627092374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:15,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783284642] [2021-06-05 21:20:15,298 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:15,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:15,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:15,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:20:15,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:15,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783284642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:15,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:15,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:20:15,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129225536] [2021-06-05 21:20:15,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:15,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:15,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:15,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:15,419 INFO L87 Difference]: Start difference. First operand 74732 states and 295734 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:17,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:17,010 INFO L93 Difference]: Finished difference Result 79230 states and 308433 transitions. [2021-06-05 21:20:17,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 21:20:17,011 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:20:17,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:17,217 INFO L225 Difference]: With dead ends: 79230 [2021-06-05 21:20:17,217 INFO L226 Difference]: Without dead ends: 79222 [2021-06-05 21:20:17,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1005.6ms TimeCoverageRelationStatistics Valid=1095, Invalid=3195, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 21:20:17,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79222 states. [2021-06-05 21:20:18,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79222 to 75148. [2021-06-05 21:20:18,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75148 states, 75147 states have (on average 3.9512156173899156) internal successors, (296922), 75147 states have internal predecessors, (296922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75148 states to 75148 states and 296922 transitions. [2021-06-05 21:20:19,285 INFO L78 Accepts]: Start accepts. Automaton has 75148 states and 296922 transitions. Word has length 25 [2021-06-05 21:20:19,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:19,285 INFO L482 AbstractCegarLoop]: Abstraction has 75148 states and 296922 transitions. [2021-06-05 21:20:19,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 75148 states and 296922 transitions. [2021-06-05 21:20:19,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:20:19,433 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:19,433 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:19,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:19,636 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:19,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:19,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1797760712, now seen corresponding path program 47 times [2021-06-05 21:20:19,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:19,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727948376] [2021-06-05 21:20:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:19,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:19,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727948376] [2021-06-05 21:20:19,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727948376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:19,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884358712] [2021-06-05 21:20:19,661 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:19,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 21:20:19,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:19,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:20:19,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:19,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884358712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:19,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:19,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:20:19,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342490924] [2021-06-05 21:20:19,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:20:19,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:19,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:20:19,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:20:19,780 INFO L87 Difference]: Start difference. First operand 75148 states and 296922 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:20:20,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:20,954 INFO L93 Difference]: Finished difference Result 78369 states and 306164 transitions. [2021-06-05 21:20:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 21:20:20,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 25 [2021-06-05 21:20:20,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:21,159 INFO L225 Difference]: With dead ends: 78369 [2021-06-05 21:20:21,159 INFO L226 Difference]: Without dead ends: 78348 [2021-06-05 21:20:21,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 590.3ms TimeCoverageRelationStatistics Valid=701, Invalid=2161, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 21:20:21,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78348 states. [2021-06-05 21:20:22,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78348 to 75088. [2021-06-05 21:20:22,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75088 states, 75087 states have (on average 3.951735986255943) internal successors, (296724), 75087 states have internal predecessors, (296724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75088 states to 75088 states and 296724 transitions. [2021-06-05 21:20:23,067 INFO L78 Accepts]: Start accepts. Automaton has 75088 states and 296724 transitions. Word has length 25 [2021-06-05 21:20:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:23,067 INFO L482 AbstractCegarLoop]: Abstraction has 75088 states and 296724 transitions. [2021-06-05 21:20:23,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:20:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 75088 states and 296724 transitions. [2021-06-05 21:20:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:20:23,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:23,196 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:23,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:23,396 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:23,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:23,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1167960976, now seen corresponding path program 48 times [2021-06-05 21:20:23,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:23,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062117751] [2021-06-05 21:20:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:23,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:23,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:23,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062117751] [2021-06-05 21:20:23,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062117751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:23,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124317044] [2021-06-05 21:20:23,425 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:23,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 21:20:23,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:23,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:20:23,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:23,545 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:23,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124317044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:23,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:23,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:20:23,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875860691] [2021-06-05 21:20:23,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:23,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:23,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:23,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:23,546 INFO L87 Difference]: Start difference. First operand 75088 states and 296724 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:24,968 INFO L93 Difference]: Finished difference Result 78172 states and 305580 transitions. [2021-06-05 21:20:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 21:20:24,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:20:24,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:25,190 INFO L225 Difference]: With dead ends: 78172 [2021-06-05 21:20:25,190 INFO L226 Difference]: Without dead ends: 78109 [2021-06-05 21:20:25,190 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 582.8ms TimeCoverageRelationStatistics Valid=677, Invalid=2293, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 21:20:25,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78109 states. [2021-06-05 21:20:26,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78109 to 74810. [2021-06-05 21:20:26,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74810 states, 74809 states have (on average 3.954350412383537) internal successors, (295821), 74809 states have internal predecessors, (295821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:26,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74810 states to 74810 states and 295821 transitions. [2021-06-05 21:20:26,878 INFO L78 Accepts]: Start accepts. Automaton has 74810 states and 295821 transitions. Word has length 25 [2021-06-05 21:20:26,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:26,878 INFO L482 AbstractCegarLoop]: Abstraction has 74810 states and 295821 transitions. [2021-06-05 21:20:26,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:26,878 INFO L276 IsEmpty]: Start isEmpty. Operand 74810 states and 295821 transitions. [2021-06-05 21:20:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:20:27,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:27,004 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:27,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:27,205 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:27,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1279246648, now seen corresponding path program 49 times [2021-06-05 21:20:27,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:27,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329373268] [2021-06-05 21:20:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:27,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:27,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329373268] [2021-06-05 21:20:27,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329373268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:27,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078748222] [2021-06-05 21:20:27,234 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:27,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:20:27,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:27,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078748222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:27,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:27,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:20:27,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191165563] [2021-06-05 21:20:27,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:27,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:27,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:27,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:27,688 INFO L87 Difference]: Start difference. First operand 74810 states and 295821 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:29,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:29,066 INFO L93 Difference]: Finished difference Result 81188 states and 317375 transitions. [2021-06-05 21:20:29,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 21:20:29,067 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:20:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:29,283 INFO L225 Difference]: With dead ends: 81188 [2021-06-05 21:20:29,283 INFO L226 Difference]: Without dead ends: 81180 [2021-06-05 21:20:29,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 681.6ms TimeCoverageRelationStatistics Valid=931, Invalid=2729, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 21:20:29,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81180 states. [2021-06-05 21:20:30,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81180 to 76583. [2021-06-05 21:20:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76583 states, 76582 states have (on average 3.962119035804758) internal successors, (303427), 76582 states have internal predecessors, (303427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76583 states to 76583 states and 303427 transitions. [2021-06-05 21:20:31,201 INFO L78 Accepts]: Start accepts. Automaton has 76583 states and 303427 transitions. Word has length 25 [2021-06-05 21:20:31,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:31,201 INFO L482 AbstractCegarLoop]: Abstraction has 76583 states and 303427 transitions. [2021-06-05 21:20:31,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:31,201 INFO L276 IsEmpty]: Start isEmpty. Operand 76583 states and 303427 transitions. [2021-06-05 21:20:31,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:20:31,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:31,330 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:31,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 21:20:31,531 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:31,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:31,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1446983368, now seen corresponding path program 50 times [2021-06-05 21:20:31,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:31,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368904032] [2021-06-05 21:20:31,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:31,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:31,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368904032] [2021-06-05 21:20:31,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368904032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:31,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349713882] [2021-06-05 21:20:31,563 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:31,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:20:31,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:31,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:20:31,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:31,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349713882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:31,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:31,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:20:31,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573666298] [2021-06-05 21:20:31,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:31,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:31,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:31,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:31,688 INFO L87 Difference]: Start difference. First operand 76583 states and 303427 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:33,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:33,631 INFO L93 Difference]: Finished difference Result 82464 states and 321047 transitions. [2021-06-05 21:20:33,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 21:20:33,631 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:20:33,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:33,845 INFO L225 Difference]: With dead ends: 82464 [2021-06-05 21:20:33,845 INFO L226 Difference]: Without dead ends: 82456 [2021-06-05 21:20:33,845 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 942.6ms TimeCoverageRelationStatistics Valid=1404, Invalid=4758, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 21:20:33,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82456 states. [2021-06-05 21:20:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82456 to 76869. [2021-06-05 21:20:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76869 states, 76868 states have (on average 3.9596451058958215) internal successors, (304370), 76868 states have internal predecessors, (304370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76869 states to 76869 states and 304370 transitions. [2021-06-05 21:20:35,931 INFO L78 Accepts]: Start accepts. Automaton has 76869 states and 304370 transitions. Word has length 25 [2021-06-05 21:20:35,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:35,931 INFO L482 AbstractCegarLoop]: Abstraction has 76869 states and 304370 transitions. [2021-06-05 21:20:35,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:35,931 INFO L276 IsEmpty]: Start isEmpty. Operand 76869 states and 304370 transitions. [2021-06-05 21:20:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:20:36,060 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:36,060 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:36,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 21:20:36,261 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:36,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:36,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1320107720, now seen corresponding path program 51 times [2021-06-05 21:20:36,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:36,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909224634] [2021-06-05 21:20:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:36,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:36,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909224634] [2021-06-05 21:20:36,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909224634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:36,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364382797] [2021-06-05 21:20:36,289 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:36,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:20:36,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:36,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:20:36,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:36,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364382797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:36,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:36,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:20:36,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336224076] [2021-06-05 21:20:36,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:36,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:36,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:36,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:36,412 INFO L87 Difference]: Start difference. First operand 76869 states and 304370 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:37,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:37,962 INFO L93 Difference]: Finished difference Result 81475 states and 318364 transitions. [2021-06-05 21:20:37,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 21:20:37,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:20:37,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:38,173 INFO L225 Difference]: With dead ends: 81475 [2021-06-05 21:20:38,173 INFO L226 Difference]: Without dead ends: 81454 [2021-06-05 21:20:38,173 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 658.2ms TimeCoverageRelationStatistics Valid=844, Invalid=2816, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 21:20:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81454 states. [2021-06-05 21:20:39,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81454 to 76613. [2021-06-05 21:20:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76613 states, 76612 states have (on average 3.9612332271706783) internal successors, (303478), 76612 states have internal predecessors, (303478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76613 states to 76613 states and 303478 transitions. [2021-06-05 21:20:39,983 INFO L78 Accepts]: Start accepts. Automaton has 76613 states and 303478 transitions. Word has length 25 [2021-06-05 21:20:39,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:39,983 INFO L482 AbstractCegarLoop]: Abstraction has 76613 states and 303478 transitions. [2021-06-05 21:20:39,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 76613 states and 303478 transitions. [2021-06-05 21:20:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:20:40,430 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:40,430 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:40,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 21:20:40,645 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:40,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:40,645 INFO L82 PathProgramCache]: Analyzing trace with hash 252961740, now seen corresponding path program 52 times [2021-06-05 21:20:40,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:40,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038404504] [2021-06-05 21:20:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:40,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:40,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:40,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038404504] [2021-06-05 21:20:40,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038404504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:40,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644046405] [2021-06-05 21:20:40,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:40,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:20:40,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:40,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:20:40,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:40,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644046405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:40,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:40,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:20:40,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514359002] [2021-06-05 21:20:40,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:20:40,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:40,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:20:40,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:20:40,795 INFO L87 Difference]: Start difference. First operand 76613 states and 303478 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:42,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:42,261 INFO L93 Difference]: Finished difference Result 89631 states and 343682 transitions. [2021-06-05 21:20:42,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 21:20:42,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:20:42,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:42,776 INFO L225 Difference]: With dead ends: 89631 [2021-06-05 21:20:42,776 INFO L226 Difference]: Without dead ends: 89623 [2021-06-05 21:20:42,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 768.5ms TimeCoverageRelationStatistics Valid=1068, Invalid=2964, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 21:20:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89623 states. [2021-06-05 21:20:44,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89623 to 76460. [2021-06-05 21:20:44,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76460 states, 76459 states have (on average 3.9617049660602413) internal successors, (302908), 76459 states have internal predecessors, (302908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76460 states to 76460 states and 302908 transitions. [2021-06-05 21:20:44,349 INFO L78 Accepts]: Start accepts. Automaton has 76460 states and 302908 transitions. Word has length 25 [2021-06-05 21:20:44,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:44,349 INFO L482 AbstractCegarLoop]: Abstraction has 76460 states and 302908 transitions. [2021-06-05 21:20:44,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:44,349 INFO L276 IsEmpty]: Start isEmpty. Operand 76460 states and 302908 transitions. [2021-06-05 21:20:44,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:20:44,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:44,477 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:44,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-05 21:20:44,684 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:44,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:44,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1221820392, now seen corresponding path program 107 times [2021-06-05 21:20:44,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:44,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582656570] [2021-06-05 21:20:44,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:44,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:44,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582656570] [2021-06-05 21:20:44,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582656570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:44,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55784387] [2021-06-05 21:20:44,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:44,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:20:44,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:44,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:20:44,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:44,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55784387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:44,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:44,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:20:44,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179073859] [2021-06-05 21:20:44,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:20:44,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:44,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:20:44,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:20:44,819 INFO L87 Difference]: Start difference. First operand 76460 states and 302908 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:47,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:47,321 INFO L93 Difference]: Finished difference Result 141405 states and 538135 transitions. [2021-06-05 21:20:47,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 21:20:47,322 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:20:47,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:48,095 INFO L225 Difference]: With dead ends: 141405 [2021-06-05 21:20:48,095 INFO L226 Difference]: Without dead ends: 141391 [2021-06-05 21:20:48,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 1424.7ms TimeCoverageRelationStatistics Valid=1622, Invalid=5020, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 21:20:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141391 states. [2021-06-05 21:20:50,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141391 to 85745. [2021-06-05 21:20:50,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85745 states, 85744 states have (on average 3.9719747154319838) internal successors, (340573), 85744 states have internal predecessors, (340573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:50,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85745 states to 85745 states and 340573 transitions. [2021-06-05 21:20:50,748 INFO L78 Accepts]: Start accepts. Automaton has 85745 states and 340573 transitions. Word has length 25 [2021-06-05 21:20:50,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:50,748 INFO L482 AbstractCegarLoop]: Abstraction has 85745 states and 340573 transitions. [2021-06-05 21:20:50,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand 85745 states and 340573 transitions. [2021-06-05 21:20:50,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:20:50,898 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:50,898 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:51,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-05 21:20:51,098 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:51,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:51,099 INFO L82 PathProgramCache]: Analyzing trace with hash -898121568, now seen corresponding path program 108 times [2021-06-05 21:20:51,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:51,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031645596] [2021-06-05 21:20:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:51,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:51,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031645596] [2021-06-05 21:20:51,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031645596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:51,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128477468] [2021-06-05 21:20:51,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:51,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:20:51,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:20:51,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:20:51,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:51,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128477468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:51,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:51,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:20:51,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378601233] [2021-06-05 21:20:51,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:20:51,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:51,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:20:51,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:20:51,238 INFO L87 Difference]: Start difference. First operand 85745 states and 340573 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:53,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:53,695 INFO L93 Difference]: Finished difference Result 126156 states and 484176 transitions. [2021-06-05 21:20:53,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 21:20:53,695 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:20:53,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:54,066 INFO L225 Difference]: With dead ends: 126156 [2021-06-05 21:20:54,066 INFO L226 Difference]: Without dead ends: 126098 [2021-06-05 21:20:54,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2860 ImplicationChecksByTransitivity, 1167.9ms TimeCoverageRelationStatistics Valid=1686, Invalid=6146, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 21:20:54,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126098 states. [2021-06-05 21:20:56,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126098 to 78138. [2021-06-05 21:20:56,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78138 states, 78137 states have (on average 3.9668018992282787) internal successors, (309954), 78137 states have internal predecessors, (309954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:56,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78138 states to 78138 states and 309954 transitions. [2021-06-05 21:20:56,516 INFO L78 Accepts]: Start accepts. Automaton has 78138 states and 309954 transitions. Word has length 25 [2021-06-05 21:20:56,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:20:56,516 INFO L482 AbstractCegarLoop]: Abstraction has 78138 states and 309954 transitions. [2021-06-05 21:20:56,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:56,516 INFO L276 IsEmpty]: Start isEmpty. Operand 78138 states and 309954 transitions. [2021-06-05 21:20:56,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:20:56,651 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:20:56,651 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:20:56,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:56,852 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:20:56,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:20:56,852 INFO L82 PathProgramCache]: Analyzing trace with hash 369349092, now seen corresponding path program 109 times [2021-06-05 21:20:56,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:20:56,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374167876] [2021-06-05 21:20:56,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:20:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:56,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:20:56,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374167876] [2021-06-05 21:20:56,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374167876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:56,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293971945] [2021-06-05 21:20:56,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:20:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:20:56,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:20:56,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:20:56,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:20:56,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293971945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:20:56,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:20:56,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:20:56,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174290828] [2021-06-05 21:20:56,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:20:56,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:20:56,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:20:56,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:20:56,989 INFO L87 Difference]: Start difference. First operand 78138 states and 309954 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:20:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:20:58,199 INFO L93 Difference]: Finished difference Result 87891 states and 343998 transitions. [2021-06-05 21:20:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 21:20:58,200 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:20:58,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:20:58,440 INFO L225 Difference]: With dead ends: 87891 [2021-06-05 21:20:58,440 INFO L226 Difference]: Without dead ends: 87856 [2021-06-05 21:20:58,441 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-06-05 21:20:58,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87856 states. [2021-06-05 21:20:59,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87856 to 78039. [2021-06-05 21:21:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78039 states, 78038 states have (on average 3.9667213408852096) internal successors, (309555), 78038 states have internal predecessors, (309555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:00,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78039 states to 78039 states and 309555 transitions. [2021-06-05 21:21:00,273 INFO L78 Accepts]: Start accepts. Automaton has 78039 states and 309555 transitions. Word has length 25 [2021-06-05 21:21:00,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:00,274 INFO L482 AbstractCegarLoop]: Abstraction has 78039 states and 309555 transitions. [2021-06-05 21:21:00,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:00,274 INFO L276 IsEmpty]: Start isEmpty. Operand 78039 states and 309555 transitions. [2021-06-05 21:21:00,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 21:21:00,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:00,409 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:00,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 21:21:00,609 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:00,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:00,609 INFO L82 PathProgramCache]: Analyzing trace with hash 24251820, now seen corresponding path program 110 times [2021-06-05 21:21:00,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:00,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342940619] [2021-06-05 21:21:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:00,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:00,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342940619] [2021-06-05 21:21:00,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342940619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:00,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43499215] [2021-06-05 21:21:00,989 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:01,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:21:01,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:01,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 21:21:01,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:01,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43499215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:01,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:01,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-06-05 21:21:01,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525199529] [2021-06-05 21:21:01,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 21:21:01,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:01,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 21:21:01,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 21:21:01,102 INFO L87 Difference]: Start difference. First operand 78039 states and 309555 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:02,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:02,758 INFO L93 Difference]: Finished difference Result 113230 states and 433782 transitions. [2021-06-05 21:21:02,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 21:21:02,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 21:21:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:03,371 INFO L225 Difference]: With dead ends: 113230 [2021-06-05 21:21:03,371 INFO L226 Difference]: Without dead ends: 113160 [2021-06-05 21:21:03,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 761.6ms TimeCoverageRelationStatistics Valid=842, Invalid=3580, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 21:21:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113160 states. [2021-06-05 21:21:04,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113160 to 82815. [2021-06-05 21:21:05,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82815 states, 82814 states have (on average 3.9658994855942233) internal successors, (328432), 82814 states have internal predecessors, (328432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:05,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82815 states to 82815 states and 328432 transitions. [2021-06-05 21:21:05,325 INFO L78 Accepts]: Start accepts. Automaton has 82815 states and 328432 transitions. Word has length 25 [2021-06-05 21:21:05,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:05,325 INFO L482 AbstractCegarLoop]: Abstraction has 82815 states and 328432 transitions. [2021-06-05 21:21:05,325 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:05,325 INFO L276 IsEmpty]: Start isEmpty. Operand 82815 states and 328432 transitions. [2021-06-05 21:21:05,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:21:05,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:05,478 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:05,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:05,679 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:05,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:05,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1011907136, now seen corresponding path program 57 times [2021-06-05 21:21:05,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:05,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924064817] [2021-06-05 21:21:05,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:05,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:05,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924064817] [2021-06-05 21:21:05,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924064817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:05,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247948996] [2021-06-05 21:21:05,748 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:05,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:21:05,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:05,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:21:05,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:06,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247948996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:06,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:06,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:21:06,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816947040] [2021-06-05 21:21:06,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:21:06,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:06,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:21:06,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:21:06,244 INFO L87 Difference]: Start difference. First operand 82815 states and 328432 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 21:21:06,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:06,884 INFO L93 Difference]: Finished difference Result 84156 states and 332499 transitions. [2021-06-05 21:21:06,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:21:06,884 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 21:21:06,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:07,116 INFO L225 Difference]: With dead ends: 84156 [2021-06-05 21:21:07,117 INFO L226 Difference]: Without dead ends: 84126 [2021-06-05 21:21:07,117 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:07,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84126 states. [2021-06-05 21:21:08,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84126 to 83209. [2021-06-05 21:21:08,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83209 states, 83208 states have (on average 3.964847130083646) internal successors, (329907), 83208 states have internal predecessors, (329907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83209 states to 83209 states and 329907 transitions. [2021-06-05 21:21:09,319 INFO L78 Accepts]: Start accepts. Automaton has 83209 states and 329907 transitions. Word has length 27 [2021-06-05 21:21:09,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:09,319 INFO L482 AbstractCegarLoop]: Abstraction has 83209 states and 329907 transitions. [2021-06-05 21:21:09,319 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 21:21:09,320 INFO L276 IsEmpty]: Start isEmpty. Operand 83209 states and 329907 transitions. [2021-06-05 21:21:09,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:21:09,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:09,468 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:09,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:09,669 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:09,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:09,669 INFO L82 PathProgramCache]: Analyzing trace with hash -29066818, now seen corresponding path program 58 times [2021-06-05 21:21:09,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:09,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346006467] [2021-06-05 21:21:09,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:09,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:09,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346006467] [2021-06-05 21:21:09,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346006467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:09,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167863644] [2021-06-05 21:21:09,728 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:09,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:09,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:09,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:21:09,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:09,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167863644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:09,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:09,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:21:09,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771649022] [2021-06-05 21:21:09,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:21:09,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:09,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:21:09,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:21:09,883 INFO L87 Difference]: Start difference. First operand 83209 states and 329907 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 21:21:10,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:10,563 INFO L93 Difference]: Finished difference Result 85178 states and 335994 transitions. [2021-06-05 21:21:10,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:21:10,564 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 21:21:10,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:10,800 INFO L225 Difference]: With dead ends: 85178 [2021-06-05 21:21:10,801 INFO L226 Difference]: Without dead ends: 85112 [2021-06-05 21:21:10,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:11,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85112 states. [2021-06-05 21:21:12,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85112 to 84063. [2021-06-05 21:21:12,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84063 states, 84062 states have (on average 3.9608622207418334) internal successors, (332958), 84062 states have internal predecessors, (332958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:12,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84063 states to 84063 states and 332958 transitions. [2021-06-05 21:21:12,779 INFO L78 Accepts]: Start accepts. Automaton has 84063 states and 332958 transitions. Word has length 27 [2021-06-05 21:21:12,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:12,779 INFO L482 AbstractCegarLoop]: Abstraction has 84063 states and 332958 transitions. [2021-06-05 21:21:12,779 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 21:21:12,779 INFO L276 IsEmpty]: Start isEmpty. Operand 84063 states and 332958 transitions. [2021-06-05 21:21:12,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:21:12,929 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:12,930 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:13,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:13,130 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:13,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:13,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1082149646, now seen corresponding path program 111 times [2021-06-05 21:21:13,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:13,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63303487] [2021-06-05 21:21:13,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:13,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:13,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63303487] [2021-06-05 21:21:13,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63303487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:13,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739193438] [2021-06-05 21:21:13,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:13,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:21:13,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:13,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:21:13,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:13,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739193438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:13,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:13,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:21:13,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562656968] [2021-06-05 21:21:13,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:21:13,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:13,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:21:13,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:21:13,307 INFO L87 Difference]: Start difference. First operand 84063 states and 332958 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 21:21:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:14,354 INFO L93 Difference]: Finished difference Result 104547 states and 413259 transitions. [2021-06-05 21:21:14,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:21:14,355 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 21:21:14,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:14,662 INFO L225 Difference]: With dead ends: 104547 [2021-06-05 21:21:14,662 INFO L226 Difference]: Without dead ends: 104517 [2021-06-05 21:21:14,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:21:14,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104517 states. [2021-06-05 21:21:16,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104517 to 101953. [2021-06-05 21:21:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101953 states, 101952 states have (on average 3.9741545040803516) internal successors, (405173), 101952 states have internal predecessors, (405173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:17,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101953 states to 101953 states and 405173 transitions. [2021-06-05 21:21:17,293 INFO L78 Accepts]: Start accepts. Automaton has 101953 states and 405173 transitions. Word has length 27 [2021-06-05 21:21:17,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:17,293 INFO L482 AbstractCegarLoop]: Abstraction has 101953 states and 405173 transitions. [2021-06-05 21:21:17,293 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 21:21:17,293 INFO L276 IsEmpty]: Start isEmpty. Operand 101953 states and 405173 transitions. [2021-06-05 21:21:17,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:21:17,473 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:17,473 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:17,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 21:21:17,688 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:17,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:17,688 INFO L82 PathProgramCache]: Analyzing trace with hash 987651120, now seen corresponding path program 112 times [2021-06-05 21:21:17,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:17,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161471149] [2021-06-05 21:21:17,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:17,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:17,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161471149] [2021-06-05 21:21:17,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161471149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:17,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282722490] [2021-06-05 21:21:17,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:17,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:17,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:17,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:21:17,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:17,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282722490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:17,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:17,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:21:17,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964160741] [2021-06-05 21:21:17,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:21:17,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:17,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:21:17,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:21:17,871 INFO L87 Difference]: Start difference. First operand 101953 states and 405173 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:19,134 INFO L93 Difference]: Finished difference Result 104396 states and 413014 transitions. [2021-06-05 21:21:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:21:19,134 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 21:21:19,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:19,550 INFO L225 Difference]: With dead ends: 104396 [2021-06-05 21:21:19,551 INFO L226 Difference]: Without dead ends: 104328 [2021-06-05 21:21:19,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:21:19,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104328 states. [2021-06-05 21:21:21,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104328 to 102946. [2021-06-05 21:21:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102946 states, 102945 states have (on average 3.9696925542765555) internal successors, (408660), 102945 states have internal predecessors, (408660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:22,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102946 states to 102946 states and 408660 transitions. [2021-06-05 21:21:22,300 INFO L78 Accepts]: Start accepts. Automaton has 102946 states and 408660 transitions. Word has length 27 [2021-06-05 21:21:22,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:22,300 INFO L482 AbstractCegarLoop]: Abstraction has 102946 states and 408660 transitions. [2021-06-05 21:21:22,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:22,300 INFO L276 IsEmpty]: Start isEmpty. Operand 102946 states and 408660 transitions. [2021-06-05 21:21:22,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:21:22,487 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:22,487 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:22,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 21:21:22,687 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:22,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:22,688 INFO L82 PathProgramCache]: Analyzing trace with hash -937524992, now seen corresponding path program 113 times [2021-06-05 21:21:22,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:22,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590254428] [2021-06-05 21:21:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:22,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:22,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590254428] [2021-06-05 21:21:22,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590254428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:22,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527609247] [2021-06-05 21:21:22,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:22,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:21:22,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:22,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:21:22,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:22,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527609247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:22,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:22,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:21:22,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270506014] [2021-06-05 21:21:22,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:21:22,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:22,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:21:22,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:21:22,875 INFO L87 Difference]: Start difference. First operand 102946 states and 408660 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 21:21:23,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:23,665 INFO L93 Difference]: Finished difference Result 104776 states and 414503 transitions. [2021-06-05 21:21:23,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:21:23,666 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 21:21:23,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:24,357 INFO L225 Difference]: With dead ends: 104776 [2021-06-05 21:21:24,357 INFO L226 Difference]: Without dead ends: 104687 [2021-06-05 21:21:24,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:24,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104687 states. [2021-06-05 21:21:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104687 to 103810. [2021-06-05 21:21:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103810 states, 103809 states have (on average 3.9660723058694334) internal successors, (411714), 103809 states have internal predecessors, (411714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:26,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103810 states to 103810 states and 411714 transitions. [2021-06-05 21:21:26,515 INFO L78 Accepts]: Start accepts. Automaton has 103810 states and 411714 transitions. Word has length 27 [2021-06-05 21:21:26,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:26,515 INFO L482 AbstractCegarLoop]: Abstraction has 103810 states and 411714 transitions. [2021-06-05 21:21:26,515 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 21:21:26,515 INFO L276 IsEmpty]: Start isEmpty. Operand 103810 states and 411714 transitions. [2021-06-05 21:21:27,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:21:27,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:27,148 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:27,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-05 21:21:27,348 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:27,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1974933008, now seen corresponding path program 114 times [2021-06-05 21:21:27,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:27,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753010787] [2021-06-05 21:21:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:27,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:27,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753010787] [2021-06-05 21:21:27,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753010787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:27,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324537323] [2021-06-05 21:21:27,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:27,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 21:21:27,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:27,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:21:27,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:27,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324537323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:27,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:27,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:21:27,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34708480] [2021-06-05 21:21:27,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:21:27,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:27,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:21:27,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:21:27,541 INFO L87 Difference]: Start difference. First operand 103810 states and 411714 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 21:21:28,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:28,340 INFO L93 Difference]: Finished difference Result 105868 states and 418138 transitions. [2021-06-05 21:21:28,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:21:28,340 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 21:21:28,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:28,662 INFO L225 Difference]: With dead ends: 105868 [2021-06-05 21:21:28,663 INFO L226 Difference]: Without dead ends: 105809 [2021-06-05 21:21:28,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:21:28,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105809 states. [2021-06-05 21:21:30,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105809 to 104869. [2021-06-05 21:21:31,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104869 states, 104868 states have (on average 3.9602738681008507) internal successors, (415306), 104868 states have internal predecessors, (415306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:31,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104869 states to 104869 states and 415306 transitions. [2021-06-05 21:21:31,370 INFO L78 Accepts]: Start accepts. Automaton has 104869 states and 415306 transitions. Word has length 27 [2021-06-05 21:21:31,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:31,370 INFO L482 AbstractCegarLoop]: Abstraction has 104869 states and 415306 transitions. [2021-06-05 21:21:31,370 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 21:21:31,370 INFO L276 IsEmpty]: Start isEmpty. Operand 104869 states and 415306 transitions. [2021-06-05 21:21:31,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:21:31,929 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:31,929 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:32,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 21:21:32,144 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:32,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:32,144 INFO L82 PathProgramCache]: Analyzing trace with hash -649199420, now seen corresponding path program 115 times [2021-06-05 21:21:32,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:32,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23775277] [2021-06-05 21:21:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:32,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:32,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23775277] [2021-06-05 21:21:32,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23775277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:32,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696138936] [2021-06-05 21:21:32,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:32,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:21:32,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:32,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696138936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:32,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:32,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:21:32,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423001225] [2021-06-05 21:21:32,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:21:32,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:32,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:21:32,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:21:32,307 INFO L87 Difference]: Start difference. First operand 104869 states and 415306 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 21:21:32,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:32,985 INFO L93 Difference]: Finished difference Result 108205 states and 426026 transitions. [2021-06-05 21:21:32,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:21:32,985 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 21:21:32,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:33,299 INFO L225 Difference]: With dead ends: 108205 [2021-06-05 21:21:33,299 INFO L226 Difference]: Without dead ends: 108131 [2021-06-05 21:21:33,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:21:33,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108131 states. [2021-06-05 21:21:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108131 to 105298. [2021-06-05 21:21:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105298 states, 105297 states have (on average 3.957187764133831) internal successors, (416680), 105297 states have internal predecessors, (416680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:36,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105298 states to 105298 states and 416680 transitions. [2021-06-05 21:21:36,003 INFO L78 Accepts]: Start accepts. Automaton has 105298 states and 416680 transitions. Word has length 27 [2021-06-05 21:21:36,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:36,003 INFO L482 AbstractCegarLoop]: Abstraction has 105298 states and 416680 transitions. [2021-06-05 21:21:36,003 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 21:21:36,003 INFO L276 IsEmpty]: Start isEmpty. Operand 105298 states and 416680 transitions. [2021-06-05 21:21:36,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:21:36,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:36,185 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:36,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 21:21:36,389 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:36,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:36,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1619140856, now seen corresponding path program 116 times [2021-06-05 21:21:36,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:36,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212737148] [2021-06-05 21:21:36,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 21:21:36,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:36,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212737148] [2021-06-05 21:21:36,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212737148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:36,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091600477] [2021-06-05 21:21:36,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:36,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:21:36,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:36,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:21:36,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:37,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091600477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:37,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:37,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:21:37,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510757600] [2021-06-05 21:21:37,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:21:37,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:37,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:21:37,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:21:37,053 INFO L87 Difference]: Start difference. First operand 105298 states and 416680 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 21:21:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:37,803 INFO L93 Difference]: Finished difference Result 114127 states and 449362 transitions. [2021-06-05 21:21:37,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:21:37,803 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 21:21:37,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:38,147 INFO L225 Difference]: With dead ends: 114127 [2021-06-05 21:21:38,147 INFO L226 Difference]: Without dead ends: 114072 [2021-06-05 21:21:38,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 563.1ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:21:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114072 states. [2021-06-05 21:21:40,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114072 to 110882. [2021-06-05 21:21:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110882 states, 110881 states have (on average 3.957747495062274) internal successors, (438839), 110881 states have internal predecessors, (438839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110882 states to 110882 states and 438839 transitions. [2021-06-05 21:21:40,886 INFO L78 Accepts]: Start accepts. Automaton has 110882 states and 438839 transitions. Word has length 27 [2021-06-05 21:21:40,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:40,886 INFO L482 AbstractCegarLoop]: Abstraction has 110882 states and 438839 transitions. [2021-06-05 21:21:40,886 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 21:21:40,886 INFO L276 IsEmpty]: Start isEmpty. Operand 110882 states and 438839 transitions. [2021-06-05 21:21:41,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:21:41,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:41,096 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:41,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-05 21:21:41,296 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:41,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:41,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1998266096, now seen corresponding path program 117 times [2021-06-05 21:21:41,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:41,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772738572] [2021-06-05 21:21:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:41,787 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 21:21:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:41,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:41,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772738572] [2021-06-05 21:21:41,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772738572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:41,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856488846] [2021-06-05 21:21:41,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:41,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 21:21:41,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:41,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:21:41,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:42,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856488846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:42,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:42,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:21:42,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896846972] [2021-06-05 21:21:42,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:21:42,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:42,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:21:42,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:21:42,007 INFO L87 Difference]: Start difference. First operand 110882 states and 438839 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 21:21:42,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:42,781 INFO L93 Difference]: Finished difference Result 113600 states and 447870 transitions. [2021-06-05 21:21:42,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:21:42,781 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 21:21:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:43,109 INFO L225 Difference]: With dead ends: 113600 [2021-06-05 21:21:43,109 INFO L226 Difference]: Without dead ends: 113548 [2021-06-05 21:21:43,110 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 627.2ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:21:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113548 states. [2021-06-05 21:21:45,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113548 to 111381. [2021-06-05 21:21:45,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111381 states, 111380 states have (on average 3.955674268270785) internal successors, (440583), 111380 states have internal predecessors, (440583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:45,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111381 states to 111381 states and 440583 transitions. [2021-06-05 21:21:45,889 INFO L78 Accepts]: Start accepts. Automaton has 111381 states and 440583 transitions. Word has length 27 [2021-06-05 21:21:45,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:45,889 INFO L482 AbstractCegarLoop]: Abstraction has 111381 states and 440583 transitions. [2021-06-05 21:21:45,889 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 21:21:45,889 INFO L276 IsEmpty]: Start isEmpty. Operand 111381 states and 440583 transitions. [2021-06-05 21:21:46,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:21:46,102 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:46,102 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:46,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 21:21:46,302 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:46,302 INFO L82 PathProgramCache]: Analyzing trace with hash -265247552, now seen corresponding path program 118 times [2021-06-05 21:21:46,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:46,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136754067] [2021-06-05 21:21:46,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:46,770 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 21:21:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:46,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:46,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136754067] [2021-06-05 21:21:46,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136754067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:46,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235902431] [2021-06-05 21:21:46,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:21:46,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:21:46,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:46,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:21:46,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:47,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235902431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:47,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:47,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:21:47,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253894720] [2021-06-05 21:21:47,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:21:47,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:47,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:21:47,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:21:47,041 INFO L87 Difference]: Start difference. First operand 111381 states and 440583 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 21:21:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:47,753 INFO L93 Difference]: Finished difference Result 112607 states and 444407 transitions. [2021-06-05 21:21:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 21:21:47,753 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 21:21:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:48,086 INFO L225 Difference]: With dead ends: 112607 [2021-06-05 21:21:48,086 INFO L226 Difference]: Without dead ends: 112577 [2021-06-05 21:21:48,086 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 627.6ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:21:48,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112577 states. [2021-06-05 21:21:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112577 to 111676. [2021-06-05 21:21:50,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111676 states, 111675 states have (on average 3.9547974031788673) internal successors, (441652), 111675 states have internal predecessors, (441652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:50,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111676 states to 111676 states and 441652 transitions. [2021-06-05 21:21:50,870 INFO L78 Accepts]: Start accepts. Automaton has 111676 states and 441652 transitions. Word has length 27 [2021-06-05 21:21:50,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:50,871 INFO L482 AbstractCegarLoop]: Abstraction has 111676 states and 441652 transitions. [2021-06-05 21:21:50,871 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 21:21:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 111676 states and 441652 transitions. [2021-06-05 21:21:51,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:21:51,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:51,083 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:51,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 21:21:51,283 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:51,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:51,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1302655568, now seen corresponding path program 119 times [2021-06-05 21:21:51,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:51,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672989793] [2021-06-05 21:21:51,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:51,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:51,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672989793] [2021-06-05 21:21:51,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672989793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:51,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248710094] [2021-06-05 21:21:51,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:51,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:21:51,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:51,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:21:51,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:52,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248710094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:52,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:52,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:21:52,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96099921] [2021-06-05 21:21:52,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:21:52,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:52,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:21:52,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:21:52,050 INFO L87 Difference]: Start difference. First operand 111676 states and 441652 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 21:21:52,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:52,747 INFO L93 Difference]: Finished difference Result 112975 states and 445584 transitions. [2021-06-05 21:21:52,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:21:52,747 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 21:21:52,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:53,068 INFO L225 Difference]: With dead ends: 112975 [2021-06-05 21:21:53,068 INFO L226 Difference]: Without dead ends: 112945 [2021-06-05 21:21:53,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:21:53,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112945 states. [2021-06-05 21:21:55,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112945 to 111709. [2021-06-05 21:21:55,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111709 states, 111708 states have (on average 3.9547839008844488) internal successors, (441781), 111708 states have internal predecessors, (441781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:21:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111709 states to 111709 states and 441781 transitions. [2021-06-05 21:21:55,850 INFO L78 Accepts]: Start accepts. Automaton has 111709 states and 441781 transitions. Word has length 27 [2021-06-05 21:21:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:21:55,851 INFO L482 AbstractCegarLoop]: Abstraction has 111709 states and 441781 transitions. [2021-06-05 21:21:55,851 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 21:21:55,851 INFO L276 IsEmpty]: Start isEmpty. Operand 111709 states and 441781 transitions. [2021-06-05 21:21:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:21:56,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:21:56,515 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:21:56,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:56,731 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:21:56,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:21:56,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1790561516, now seen corresponding path program 120 times [2021-06-05 21:21:56,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:21:56,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876083479] [2021-06-05 21:21:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:21:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:21:56,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:56,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:21:56,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876083479] [2021-06-05 21:21:56,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876083479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:56,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894690500] [2021-06-05 21:21:56,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:21:56,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:21:56,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:21:56,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:21:56,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:21:56,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:21:56,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894690500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:21:56,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:21:56,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:21:56,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106589500] [2021-06-05 21:21:56,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:21:56,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:21:56,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:21:56,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:21:56,927 INFO L87 Difference]: Start difference. First operand 111709 states and 441781 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 21:21:57,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:21:57,659 INFO L93 Difference]: Finished difference Result 113142 states and 446168 transitions. [2021-06-05 21:21:57,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:21:57,660 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 21:21:57,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:21:57,990 INFO L225 Difference]: With dead ends: 113142 [2021-06-05 21:21:57,990 INFO L226 Difference]: Without dead ends: 113112 [2021-06-05 21:21:57,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 21:21:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113112 states. [2021-06-05 21:22:00,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113112 to 111867. [2021-06-05 21:22:00,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111867 states, 111866 states have (on average 3.9540253517601416) internal successors, (442321), 111866 states have internal predecessors, (442321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:00,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111867 states to 111867 states and 442321 transitions. [2021-06-05 21:22:00,791 INFO L78 Accepts]: Start accepts. Automaton has 111867 states and 442321 transitions. Word has length 27 [2021-06-05 21:22:00,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:00,791 INFO L482 AbstractCegarLoop]: Abstraction has 111867 states and 442321 transitions. [2021-06-05 21:22:00,791 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 21:22:00,791 INFO L276 IsEmpty]: Start isEmpty. Operand 111867 states and 442321 transitions. [2021-06-05 21:22:01,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:22:01,437 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:01,437 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:01,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:01,650 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:01,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:01,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1447877820, now seen corresponding path program 121 times [2021-06-05 21:22:01,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:01,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640891169] [2021-06-05 21:22:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:01,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:01,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640891169] [2021-06-05 21:22:01,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640891169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:01,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474390554] [2021-06-05 21:22:01,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:01,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:22:01,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:01,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474390554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:01,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:01,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-05 21:22:01,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789939379] [2021-06-05 21:22:01,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 21:22:01,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:01,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 21:22:01,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 21:22:01,835 INFO L87 Difference]: Start difference. First operand 111867 states and 442321 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 21:22:02,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:02,518 INFO L93 Difference]: Finished difference Result 113479 states and 447615 transitions. [2021-06-05 21:22:02,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 21:22:02,518 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 21:22:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:02,839 INFO L225 Difference]: With dead ends: 113479 [2021-06-05 21:22:02,840 INFO L226 Difference]: Without dead ends: 113435 [2021-06-05 21:22:02,840 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:02,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113435 states. [2021-06-05 21:22:05,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113435 to 112115. [2021-06-05 21:22:05,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112115 states, 112114 states have (on average 3.95435003656992) internal successors, (443338), 112114 states have internal predecessors, (443338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:05,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112115 states to 112115 states and 443338 transitions. [2021-06-05 21:22:05,634 INFO L78 Accepts]: Start accepts. Automaton has 112115 states and 443338 transitions. Word has length 27 [2021-06-05 21:22:05,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:05,634 INFO L482 AbstractCegarLoop]: Abstraction has 112115 states and 443338 transitions. [2021-06-05 21:22:05,634 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 21:22:05,634 INFO L276 IsEmpty]: Start isEmpty. Operand 112115 states and 443338 transitions. [2021-06-05 21:22:06,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:22:06,561 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:06,561 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:06,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:06,777 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:06,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:06,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1518602116, now seen corresponding path program 122 times [2021-06-05 21:22:06,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:06,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608204973] [2021-06-05 21:22:06,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:06,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:06,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608204973] [2021-06-05 21:22:06,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608204973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:06,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802520494] [2021-06-05 21:22:06,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 21:22:06,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:22:06,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:06,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:06,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:07,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802520494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:07,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:07,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:22:07,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310569289] [2021-06-05 21:22:07,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:22:07,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:07,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:22:07,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:07,005 INFO L87 Difference]: Start difference. First operand 112115 states and 443338 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 21:22:07,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:07,811 INFO L93 Difference]: Finished difference Result 114170 states and 449612 transitions. [2021-06-05 21:22:07,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 21:22:07,811 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 21:22:07,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:08,171 INFO L225 Difference]: With dead ends: 114170 [2021-06-05 21:22:08,171 INFO L226 Difference]: Without dead ends: 114082 [2021-06-05 21:22:08,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114082 states. [2021-06-05 21:22:10,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114082 to 112537. [2021-06-05 21:22:10,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112537 states, 112536 states have (on average 3.951322243548731) internal successors, (444666), 112536 states have internal predecessors, (444666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112537 states to 112537 states and 444666 transitions. [2021-06-05 21:22:10,786 INFO L78 Accepts]: Start accepts. Automaton has 112537 states and 444666 transitions. Word has length 27 [2021-06-05 21:22:10,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:10,786 INFO L482 AbstractCegarLoop]: Abstraction has 112537 states and 444666 transitions. [2021-06-05 21:22:10,786 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 21:22:10,786 INFO L276 IsEmpty]: Start isEmpty. Operand 112537 states and 444666 transitions. [2021-06-05 21:22:10,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:22:10,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:10,999 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:11,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 21:22:11,199 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:11,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:11,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1806423744, now seen corresponding path program 123 times [2021-06-05 21:22:11,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:11,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723177144] [2021-06-05 21:22:11,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:11,256 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:11,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:11,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723177144] [2021-06-05 21:22:11,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723177144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:11,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031031574] [2021-06-05 21:22:11,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:11,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:22:11,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:11,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:22:11,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:11,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031031574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:11,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:11,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:22:11,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655990022] [2021-06-05 21:22:11,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:22:11,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:11,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:22:11,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:11,376 INFO L87 Difference]: Start difference. First operand 112537 states and 444666 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 21:22:11,854 WARN L205 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-06-05 21:22:12,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:12,580 INFO L93 Difference]: Finished difference Result 115019 states and 452334 transitions. [2021-06-05 21:22:12,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 21:22:12,580 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 21:22:12,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:12,907 INFO L225 Difference]: With dead ends: 115019 [2021-06-05 21:22:12,907 INFO L226 Difference]: Without dead ends: 114939 [2021-06-05 21:22:12,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 610.9ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:22:13,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114939 states. [2021-06-05 21:22:15,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114939 to 112850. [2021-06-05 21:22:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112850 states, 112849 states have (on average 3.950163492808975) internal successors, (445772), 112849 states have internal predecessors, (445772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:15,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112850 states to 112850 states and 445772 transitions. [2021-06-05 21:22:15,756 INFO L78 Accepts]: Start accepts. Automaton has 112850 states and 445772 transitions. Word has length 27 [2021-06-05 21:22:15,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:15,756 INFO L482 AbstractCegarLoop]: Abstraction has 112850 states and 445772 transitions. [2021-06-05 21:22:15,757 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 21:22:15,757 INFO L276 IsEmpty]: Start isEmpty. Operand 112850 states and 445772 transitions. [2021-06-05 21:22:16,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 21:22:16,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:16,442 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:16,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:16,657 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:16,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:16,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1700606980, now seen corresponding path program 124 times [2021-06-05 21:22:16,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:16,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448211365] [2021-06-05 21:22:16,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:16,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:16,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:16,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448211365] [2021-06-05 21:22:16,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448211365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:16,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863545905] [2021-06-05 21:22:16,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:16,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:22:16,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:16,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 21:22:16,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:16,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863545905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:16,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:16,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-06-05 21:22:16,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844950644] [2021-06-05 21:22:16,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 21:22:16,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:16,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 21:22:16,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 21:22:16,862 INFO L87 Difference]: Start difference. First operand 112850 states and 445772 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 21:22:17,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:17,636 INFO L93 Difference]: Finished difference Result 116553 states and 457780 transitions. [2021-06-05 21:22:17,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 21:22:17,636 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 21:22:17,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:17,980 INFO L225 Difference]: With dead ends: 116553 [2021-06-05 21:22:17,980 INFO L226 Difference]: Without dead ends: 116494 [2021-06-05 21:22:17,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:22:18,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116494 states. [2021-06-05 21:22:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116494 to 113747. [2021-06-05 21:22:20,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113747 states, 113746 states have (on average 3.9470398959084276) internal successors, (448960), 113746 states have internal predecessors, (448960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:20,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113747 states to 113747 states and 448960 transitions. [2021-06-05 21:22:20,792 INFO L78 Accepts]: Start accepts. Automaton has 113747 states and 448960 transitions. Word has length 27 [2021-06-05 21:22:20,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:20,792 INFO L482 AbstractCegarLoop]: Abstraction has 113747 states and 448960 transitions. [2021-06-05 21:22:20,792 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 21:22:20,792 INFO L276 IsEmpty]: Start isEmpty. Operand 113747 states and 448960 transitions. [2021-06-05 21:22:21,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:22:21,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:21,528 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:21,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 21:22:21,741 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:21,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:21,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1030747554, now seen corresponding path program 59 times [2021-06-05 21:22:21,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:21,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918823948] [2021-06-05 21:22:21,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:21,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:21,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918823948] [2021-06-05 21:22:21,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918823948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:21,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171923343] [2021-06-05 21:22:21,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:21,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:22:21,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:21,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:22:21,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:21,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171923343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:21,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:21,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 21:22:21,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342651396] [2021-06-05 21:22:21,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:22:21,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:21,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:22:21,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:21,922 INFO L87 Difference]: Start difference. First operand 113747 states and 448960 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:22:22,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:22,778 INFO L93 Difference]: Finished difference Result 139378 states and 539146 transitions. [2021-06-05 21:22:22,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 21:22:22,778 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:22:22,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:23,657 INFO L225 Difference]: With dead ends: 139378 [2021-06-05 21:22:23,657 INFO L226 Difference]: Without dead ends: 139378 [2021-06-05 21:22:23,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2021-06-05 21:22:23,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139378 states. [2021-06-05 21:22:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139378 to 119538. [2021-06-05 21:22:25,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119538 states, 119537 states have (on average 3.948718806729297) internal successors, (472018), 119537 states have internal predecessors, (472018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119538 states to 119538 states and 472018 transitions. [2021-06-05 21:22:26,591 INFO L78 Accepts]: Start accepts. Automaton has 119538 states and 472018 transitions. Word has length 29 [2021-06-05 21:22:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:26,591 INFO L482 AbstractCegarLoop]: Abstraction has 119538 states and 472018 transitions. [2021-06-05 21:22:26,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:22:26,591 INFO L276 IsEmpty]: Start isEmpty. Operand 119538 states and 472018 transitions. [2021-06-05 21:22:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:22:26,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:26,804 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:27,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 21:22:27,005 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:27,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:27,005 INFO L82 PathProgramCache]: Analyzing trace with hash -920591248, now seen corresponding path program 125 times [2021-06-05 21:22:27,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:27,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159405046] [2021-06-05 21:22:27,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:27,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:27,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159405046] [2021-06-05 21:22:27,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159405046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:27,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181628631] [2021-06-05 21:22:27,049 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:27,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:22:27,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:27,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:22:27,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:27,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181628631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:27,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:27,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 21:22:27,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210983275] [2021-06-05 21:22:27,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:22:27,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:27,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:22:27,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:27,203 INFO L87 Difference]: Start difference. First operand 119538 states and 472018 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 21:22:28,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:28,651 INFO L93 Difference]: Finished difference Result 130689 states and 511845 transitions. [2021-06-05 21:22:28,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 21:22:28,652 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 21:22:28,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:29,036 INFO L225 Difference]: With dead ends: 130689 [2021-06-05 21:22:29,036 INFO L226 Difference]: Without dead ends: 130668 [2021-06-05 21:22:29,036 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 338.4ms TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 21:22:29,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130668 states. [2021-06-05 21:22:31,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130668 to 120153. [2021-06-05 21:22:31,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120153 states, 120152 states have (on average 3.9468589786270725) internal successors, (474223), 120152 states have internal predecessors, (474223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:31,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120153 states to 120153 states and 474223 transitions. [2021-06-05 21:22:31,832 INFO L78 Accepts]: Start accepts. Automaton has 120153 states and 474223 transitions. Word has length 29 [2021-06-05 21:22:31,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:31,832 INFO L482 AbstractCegarLoop]: Abstraction has 120153 states and 474223 transitions. [2021-06-05 21:22:31,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 21:22:31,832 INFO L276 IsEmpty]: Start isEmpty. Operand 120153 states and 474223 transitions. [2021-06-05 21:22:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:22:32,065 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:32,065 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:32,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:32,266 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:32,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:32,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1329566750, now seen corresponding path program 60 times [2021-06-05 21:22:32,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:32,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540160842] [2021-06-05 21:22:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:32,309 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:32,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:32,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540160842] [2021-06-05 21:22:32,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540160842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:32,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760891207] [2021-06-05 21:22:32,310 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:32,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 21:22:32,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:32,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:22:32,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:32,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760891207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:32,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:32,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 21:22:32,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714116213] [2021-06-05 21:22:32,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:22:32,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:32,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:22:32,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:22:32,977 INFO L87 Difference]: Start difference. First operand 120153 states and 474223 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:37,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:37,292 INFO L93 Difference]: Finished difference Result 145899 states and 560351 transitions. [2021-06-05 21:22:37,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-06-05 21:22:37,292 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 21:22:37,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:37,977 INFO L225 Difference]: With dead ends: 145899 [2021-06-05 21:22:37,977 INFO L226 Difference]: Without dead ends: 145899 [2021-06-05 21:22:37,978 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12572 ImplicationChecksByTransitivity, 3158.8ms TimeCoverageRelationStatistics Valid=6926, Invalid=21466, Unknown=0, NotChecked=0, Total=28392 [2021-06-05 21:22:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145899 states. [2021-06-05 21:22:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145899 to 127649. [2021-06-05 21:22:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127649 states, 127648 states have (on average 3.948937703685134) internal successors, (504074), 127648 states have internal predecessors, (504074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:41,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127649 states to 127649 states and 504074 transitions. [2021-06-05 21:22:41,813 INFO L78 Accepts]: Start accepts. Automaton has 127649 states and 504074 transitions. Word has length 29 [2021-06-05 21:22:41,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:41,813 INFO L482 AbstractCegarLoop]: Abstraction has 127649 states and 504074 transitions. [2021-06-05 21:22:41,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 127649 states and 504074 transitions. [2021-06-05 21:22:42,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:22:42,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:42,063 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:42,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:42,263 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:42,263 INFO L82 PathProgramCache]: Analyzing trace with hash -82100962, now seen corresponding path program 126 times [2021-06-05 21:22:42,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:42,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525234642] [2021-06-05 21:22:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:42,302 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:42,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:42,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525234642] [2021-06-05 21:22:42,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525234642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:42,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641250532] [2021-06-05 21:22:42,302 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:42,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:22:42,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:22:42,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:22:42,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:42,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641250532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:42,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:42,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 21:22:42,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327205817] [2021-06-05 21:22:42,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:22:42,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:42,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:22:42,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:42,449 INFO L87 Difference]: Start difference. First operand 127649 states and 504074 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:22:46,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:46,253 INFO L93 Difference]: Finished difference Result 216968 states and 830900 transitions. [2021-06-05 21:22:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-06-05 21:22:46,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:22:46,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:46,961 INFO L225 Difference]: With dead ends: 216968 [2021-06-05 21:22:46,961 INFO L226 Difference]: Without dead ends: 216956 [2021-06-05 21:22:46,962 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4892 ImplicationChecksByTransitivity, 1439.9ms TimeCoverageRelationStatistics Valid=2399, Invalid=10941, Unknown=0, NotChecked=0, Total=13340 [2021-06-05 21:22:47,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216956 states. [2021-06-05 21:22:50,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216956 to 166709. [2021-06-05 21:22:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166709 states, 166708 states have (on average 3.988020970799242) internal successors, (664835), 166708 states have internal predecessors, (664835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:22:52,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166709 states to 166709 states and 664835 transitions. [2021-06-05 21:22:52,146 INFO L78 Accepts]: Start accepts. Automaton has 166709 states and 664835 transitions. Word has length 29 [2021-06-05 21:22:52,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:22:52,146 INFO L482 AbstractCegarLoop]: Abstraction has 166709 states and 664835 transitions. [2021-06-05 21:22:52,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:22:52,146 INFO L276 IsEmpty]: Start isEmpty. Operand 166709 states and 664835 transitions. [2021-06-05 21:22:52,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:22:52,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:22:52,510 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:22:52,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-05 21:22:52,713 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:22:52,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:22:52,713 INFO L82 PathProgramCache]: Analyzing trace with hash 896456482, now seen corresponding path program 127 times [2021-06-05 21:22:52,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:22:52,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83301431] [2021-06-05 21:22:52,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:22:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:52,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:22:52,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83301431] [2021-06-05 21:22:52,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83301431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:52,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602512866] [2021-06-05 21:22:52,751 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:22:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:22:52,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:22:52,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:22:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:22:52,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602512866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:22:52,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:22:52,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 21:22:52,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109393115] [2021-06-05 21:22:52,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:22:52,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:22:52,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:22:52,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:22:52,896 INFO L87 Difference]: Start difference. First operand 166709 states and 664835 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 21:22:56,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:22:56,673 INFO L93 Difference]: Finished difference Result 241711 states and 913636 transitions. [2021-06-05 21:22:56,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-06-05 21:22:56,674 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 21:22:56,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:22:57,439 INFO L225 Difference]: With dead ends: 241711 [2021-06-05 21:22:57,439 INFO L226 Difference]: Without dead ends: 241690 [2021-06-05 21:22:57,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3407 ImplicationChecksByTransitivity, 1359.7ms TimeCoverageRelationStatistics Valid=1955, Invalid=7747, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 21:22:57,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241690 states. [2021-06-05 21:23:01,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241690 to 143067. [2021-06-05 21:23:02,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143067 states, 143066 states have (on average 3.9688954748158194) internal successors, (567814), 143066 states have internal predecessors, (567814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143067 states to 143067 states and 567814 transitions. [2021-06-05 21:23:03,026 INFO L78 Accepts]: Start accepts. Automaton has 143067 states and 567814 transitions. Word has length 29 [2021-06-05 21:23:03,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:03,026 INFO L482 AbstractCegarLoop]: Abstraction has 143067 states and 567814 transitions. [2021-06-05 21:23:03,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 21:23:03,027 INFO L276 IsEmpty]: Start isEmpty. Operand 143067 states and 567814 transitions. [2021-06-05 21:23:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:23:03,337 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:03,338 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:03,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:03,541 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:03,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:03,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1202691102, now seen corresponding path program 61 times [2021-06-05 21:23:03,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:03,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456985152] [2021-06-05 21:23:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:03,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:03,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456985152] [2021-06-05 21:23:03,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456985152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:03,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792668115] [2021-06-05 21:23:03,583 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:03,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:23:03,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:03,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792668115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:03,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:03,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 21:23:03,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472077291] [2021-06-05 21:23:03,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:23:03,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:03,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:23:03,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:23:03,745 INFO L87 Difference]: Start difference. First operand 143067 states and 567814 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 21:23:07,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:07,105 INFO L93 Difference]: Finished difference Result 156989 states and 610556 transitions. [2021-06-05 21:23:07,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-06-05 21:23:07,105 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 21:23:07,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:07,862 INFO L225 Difference]: With dead ends: 156989 [2021-06-05 21:23:07,862 INFO L226 Difference]: Without dead ends: 156954 [2021-06-05 21:23:07,863 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4973 ImplicationChecksByTransitivity, 1840.1ms TimeCoverageRelationStatistics Valid=3281, Invalid=9601, Unknown=0, NotChecked=0, Total=12882 [2021-06-05 21:23:07,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156954 states. [2021-06-05 21:23:10,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156954 to 142485. [2021-06-05 21:23:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142485 states, 142484 states have (on average 3.9720880941017938) internal successors, (565959), 142484 states have internal predecessors, (565959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:12,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142485 states to 142485 states and 565959 transitions. [2021-06-05 21:23:12,009 INFO L78 Accepts]: Start accepts. Automaton has 142485 states and 565959 transitions. Word has length 29 [2021-06-05 21:23:12,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:12,009 INFO L482 AbstractCegarLoop]: Abstraction has 142485 states and 565959 transitions. [2021-06-05 21:23:12,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 21:23:12,009 INFO L276 IsEmpty]: Start isEmpty. Operand 142485 states and 565959 transitions. [2021-06-05 21:23:12,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:23:12,298 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:12,298 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:12,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2021-06-05 21:23:12,498 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:12,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:12,499 INFO L82 PathProgramCache]: Analyzing trace with hash -633583326, now seen corresponding path program 62 times [2021-06-05 21:23:12,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:12,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042844465] [2021-06-05 21:23:12,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:12,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:12,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042844465] [2021-06-05 21:23:12,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042844465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:12,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669252186] [2021-06-05 21:23:12,540 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:12,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:23:12,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:12,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:23:12,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:12,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669252186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:12,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:12,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 21:23:12,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410220354] [2021-06-05 21:23:12,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:23:12,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:12,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:23:12,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:23:12,699 INFO L87 Difference]: Start difference. First operand 142485 states and 565959 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 21:23:15,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:15,878 INFO L93 Difference]: Finished difference Result 156454 states and 609144 transitions. [2021-06-05 21:23:15,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-06-05 21:23:15,878 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 21:23:15,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:16,319 INFO L225 Difference]: With dead ends: 156454 [2021-06-05 21:23:16,320 INFO L226 Difference]: Without dead ends: 156370 [2021-06-05 21:23:16,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3426 ImplicationChecksByTransitivity, 1862.5ms TimeCoverageRelationStatistics Valid=2343, Invalid=7163, Unknown=0, NotChecked=0, Total=9506 [2021-06-05 21:23:16,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156370 states. [2021-06-05 21:23:19,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156370 to 142651. [2021-06-05 21:23:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142651 states, 142650 states have (on average 3.9711461619348056) internal successors, (566484), 142650 states have internal predecessors, (566484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:20,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142651 states to 142651 states and 566484 transitions. [2021-06-05 21:23:20,411 INFO L78 Accepts]: Start accepts. Automaton has 142651 states and 566484 transitions. Word has length 29 [2021-06-05 21:23:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:20,411 INFO L482 AbstractCegarLoop]: Abstraction has 142651 states and 566484 transitions. [2021-06-05 21:23:20,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 21:23:20,411 INFO L276 IsEmpty]: Start isEmpty. Operand 142651 states and 566484 transitions. [2021-06-05 21:23:20,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:23:20,706 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:20,706 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:20,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:20,907 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:20,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:20,907 INFO L82 PathProgramCache]: Analyzing trace with hash 22459578, now seen corresponding path program 128 times [2021-06-05 21:23:20,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:20,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23726194] [2021-06-05 21:23:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:20,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:20,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23726194] [2021-06-05 21:23:20,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23726194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:20,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728221405] [2021-06-05 21:23:20,946 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:20,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:23:20,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:20,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 21:23:20,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:21,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728221405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:21,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:21,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 21:23:21,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243316108] [2021-06-05 21:23:21,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:23:21,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:21,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:23:21,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:23:21,092 INFO L87 Difference]: Start difference. First operand 142651 states and 566484 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 21:23:22,124 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-06-05 21:23:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:24,714 INFO L93 Difference]: Finished difference Result 204395 states and 781314 transitions. [2021-06-05 21:23:24,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-06-05 21:23:24,714 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 21:23:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:25,344 INFO L225 Difference]: With dead ends: 204395 [2021-06-05 21:23:25,344 INFO L226 Difference]: Without dead ends: 204318 [2021-06-05 21:23:25,345 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4280 ImplicationChecksByTransitivity, 1814.5ms TimeCoverageRelationStatistics Valid=2112, Invalid=9444, Unknown=0, NotChecked=0, Total=11556 [2021-06-05 21:23:25,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204318 states. [2021-06-05 21:23:28,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204318 to 146594. [2021-06-05 21:23:29,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146594 states, 146593 states have (on average 3.9703737559092183) internal successors, (582029), 146593 states have internal predecessors, (582029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146594 states to 146594 states and 582029 transitions. [2021-06-05 21:23:29,567 INFO L78 Accepts]: Start accepts. Automaton has 146594 states and 582029 transitions. Word has length 29 [2021-06-05 21:23:29,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:29,567 INFO L482 AbstractCegarLoop]: Abstraction has 146594 states and 582029 transitions. [2021-06-05 21:23:29,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 21:23:29,567 INFO L276 IsEmpty]: Start isEmpty. Operand 146594 states and 582029 transitions. [2021-06-05 21:23:30,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:23:30,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:30,432 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:30,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:30,648 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:30,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:30,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1855414306, now seen corresponding path program 63 times [2021-06-05 21:23:30,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:30,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892407682] [2021-06-05 21:23:30,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:30,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:30,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892407682] [2021-06-05 21:23:30,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892407682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:30,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217793367] [2021-06-05 21:23:30,690 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:30,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 21:23:30,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:30,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:23:30,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:30,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217793367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:30,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:30,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 21:23:30,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144017233] [2021-06-05 21:23:30,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:23:30,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:30,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:23:30,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:23:30,851 INFO L87 Difference]: Start difference. First operand 146594 states and 582029 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 21:23:33,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:33,542 INFO L93 Difference]: Finished difference Result 161992 states and 629672 transitions. [2021-06-05 21:23:33,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-05 21:23:33,542 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 21:23:33,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:33,995 INFO L225 Difference]: With dead ends: 161992 [2021-06-05 21:23:33,995 INFO L226 Difference]: Without dead ends: 161887 [2021-06-05 21:23:33,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 1300.3ms TimeCoverageRelationStatistics Valid=1982, Invalid=6390, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 21:23:34,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161887 states. [2021-06-05 21:23:37,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161887 to 147696. [2021-06-05 21:23:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147696 states, 147695 states have (on average 3.963465249331392) internal successors, (585384), 147695 states have internal predecessors, (585384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147696 states to 147696 states and 585384 transitions. [2021-06-05 21:23:38,564 INFO L78 Accepts]: Start accepts. Automaton has 147696 states and 585384 transitions. Word has length 29 [2021-06-05 21:23:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:38,565 INFO L482 AbstractCegarLoop]: Abstraction has 147696 states and 585384 transitions. [2021-06-05 21:23:38,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 21:23:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand 147696 states and 585384 transitions. [2021-06-05 21:23:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:23:38,978 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:38,978 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:39,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:39,189 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:39,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:39,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1485354786, now seen corresponding path program 64 times [2021-06-05 21:23:39,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:39,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544110622] [2021-06-05 21:23:39,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:39,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:39,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544110622] [2021-06-05 21:23:39,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544110622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:39,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766608045] [2021-06-05 21:23:39,232 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:39,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:23:39,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:39,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:23:39,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:39,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766608045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:39,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:39,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 21:23:39,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241807675] [2021-06-05 21:23:39,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 21:23:39,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:39,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 21:23:39,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-06-05 21:23:39,391 INFO L87 Difference]: Start difference. First operand 147696 states and 585384 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 21:23:41,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:41,785 INFO L93 Difference]: Finished difference Result 162975 states and 633141 transitions. [2021-06-05 21:23:41,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 21:23:41,786 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 21:23:41,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:42,256 INFO L225 Difference]: With dead ends: 162975 [2021-06-05 21:23:42,256 INFO L226 Difference]: Without dead ends: 162869 [2021-06-05 21:23:42,257 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2113 ImplicationChecksByTransitivity, 1432.3ms TimeCoverageRelationStatistics Valid=1510, Invalid=4970, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 21:23:42,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162869 states. [2021-06-05 21:23:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162869 to 148481. [2021-06-05 21:23:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148481 states, 148480 states have (on average 3.9611126077586207) internal successors, (588146), 148480 states have internal predecessors, (588146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148481 states to 148481 states and 588146 transitions. [2021-06-05 21:23:46,800 INFO L78 Accepts]: Start accepts. Automaton has 148481 states and 588146 transitions. Word has length 29 [2021-06-05 21:23:46,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:46,800 INFO L482 AbstractCegarLoop]: Abstraction has 148481 states and 588146 transitions. [2021-06-05 21:23:46,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 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 21:23:46,800 INFO L276 IsEmpty]: Start isEmpty. Operand 148481 states and 588146 transitions. [2021-06-05 21:23:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:23:47,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:47,181 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:47,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 21:23:47,383 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:47,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:47,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1243295782, now seen corresponding path program 65 times [2021-06-05 21:23:47,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:47,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214615112] [2021-06-05 21:23:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:47,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:47,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214615112] [2021-06-05 21:23:47,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214615112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:47,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135092018] [2021-06-05 21:23:47,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:47,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 21:23:47,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:47,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:23:47,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:47,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135092018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:47,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:47,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 21:23:47,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754057836] [2021-06-05 21:23:47,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:23:47,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:47,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:23:47,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:23:47,577 INFO L87 Difference]: Start difference. First operand 148481 states and 588146 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:49,689 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-06-05 21:23:52,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:23:52,001 INFO L93 Difference]: Finished difference Result 181881 states and 707268 transitions. [2021-06-05 21:23:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-06-05 21:23:52,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:23:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:23:52,518 INFO L225 Difference]: With dead ends: 181881 [2021-06-05 21:23:52,518 INFO L226 Difference]: Without dead ends: 181881 [2021-06-05 21:23:52,519 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9643 ImplicationChecksByTransitivity, 2764.1ms TimeCoverageRelationStatistics Valid=5083, Invalid=17567, Unknown=0, NotChecked=0, Total=22650 [2021-06-05 21:23:52,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181881 states. [2021-06-05 21:23:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181881 to 162200. [2021-06-05 21:23:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162200 states, 162199 states have (on average 3.982330347289441) internal successors, (645930), 162199 states have internal predecessors, (645930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162200 states to 162200 states and 645930 transitions. [2021-06-05 21:23:57,919 INFO L78 Accepts]: Start accepts. Automaton has 162200 states and 645930 transitions. Word has length 29 [2021-06-05 21:23:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:23:57,919 INFO L482 AbstractCegarLoop]: Abstraction has 162200 states and 645930 transitions. [2021-06-05 21:23:57,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:23:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 162200 states and 645930 transitions. [2021-06-05 21:23:58,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:23:58,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:23:58,365 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:23:58,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 21:23:58,581 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:23:58,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:23:58,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1370171430, now seen corresponding path program 66 times [2021-06-05 21:23:58,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:23:58,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418402151] [2021-06-05 21:23:58,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:23:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:23:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:58,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:23:58,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418402151] [2021-06-05 21:23:58,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418402151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:58,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155696741] [2021-06-05 21:23:58,619 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:23:58,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:23:58,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:23:58,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:23:58,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:23:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:23:58,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155696741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:23:58,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:23:58,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 21:23:58,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957009938] [2021-06-05 21:23:58,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:23:58,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:23:58,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:23:58,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:23:58,781 INFO L87 Difference]: Start difference. First operand 162200 states and 645930 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:24:01,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:01,691 INFO L93 Difference]: Finished difference Result 177121 states and 692383 transitions. [2021-06-05 21:24:01,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 21:24:01,691 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:24:01,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:02,556 INFO L225 Difference]: With dead ends: 177121 [2021-06-05 21:24:02,556 INFO L226 Difference]: Without dead ends: 177086 [2021-06-05 21:24:02,565 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2773 ImplicationChecksByTransitivity, 1636.9ms TimeCoverageRelationStatistics Valid=1953, Invalid=5703, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 21:24:02,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177086 states. [2021-06-05 21:24:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177086 to 162188. [2021-06-05 21:24:06,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162188 states, 162187 states have (on average 3.982230388378847) internal successors, (645866), 162187 states have internal predecessors, (645866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162188 states to 162188 states and 645866 transitions. [2021-06-05 21:24:07,024 INFO L78 Accepts]: Start accepts. Automaton has 162188 states and 645866 transitions. Word has length 29 [2021-06-05 21:24:07,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:07,024 INFO L482 AbstractCegarLoop]: Abstraction has 162188 states and 645866 transitions. [2021-06-05 21:24:07,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:24:07,024 INFO L276 IsEmpty]: Start isEmpty. Operand 162188 states and 645866 transitions. [2021-06-05 21:24:07,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:24:07,927 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:07,927 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:08,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 21:24:08,143 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:08,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:08,144 INFO L82 PathProgramCache]: Analyzing trace with hash -584718882, now seen corresponding path program 67 times [2021-06-05 21:24:08,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:08,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052144386] [2021-06-05 21:24:08,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:08,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:08,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052144386] [2021-06-05 21:24:08,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052144386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:08,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333073225] [2021-06-05 21:24:08,174 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:08,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:24:08,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:08,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333073225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:08,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:08,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 21:24:08,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355215544] [2021-06-05 21:24:08,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:24:08,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:08,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:24:08,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:24:08,324 INFO L87 Difference]: Start difference. First operand 162188 states and 645866 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:10,844 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-06-05 21:24:12,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:12,395 INFO L93 Difference]: Finished difference Result 201696 states and 769595 transitions. [2021-06-05 21:24:12,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-06-05 21:24:12,395 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:24:12,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:13,330 INFO L225 Difference]: With dead ends: 201696 [2021-06-05 21:24:13,330 INFO L226 Difference]: Without dead ends: 201696 [2021-06-05 21:24:13,331 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9744 ImplicationChecksByTransitivity, 2546.4ms TimeCoverageRelationStatistics Valid=5193, Invalid=18063, Unknown=0, NotChecked=0, Total=23256 [2021-06-05 21:24:13,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201696 states. [2021-06-05 21:24:17,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201696 to 162219. [2021-06-05 21:24:17,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162219 states, 162218 states have (on average 3.982646808615567) internal successors, (646057), 162218 states have internal predecessors, (646057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:18,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162219 states to 162219 states and 646057 transitions. [2021-06-05 21:24:18,452 INFO L78 Accepts]: Start accepts. Automaton has 162219 states and 646057 transitions. Word has length 29 [2021-06-05 21:24:18,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:18,452 INFO L482 AbstractCegarLoop]: Abstraction has 162219 states and 646057 transitions. [2021-06-05 21:24:18,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:18,452 INFO L276 IsEmpty]: Start isEmpty. Operand 162219 states and 646057 transitions. [2021-06-05 21:24:18,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:24:18,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:18,853 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:19,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 21:24:19,057 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:19,057 INFO L82 PathProgramCache]: Analyzing trace with hash 451962842, now seen corresponding path program 68 times [2021-06-05 21:24:19,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:19,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156064868] [2021-06-05 21:24:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:19,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:19,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156064868] [2021-06-05 21:24:19,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156064868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:19,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391051834] [2021-06-05 21:24:19,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:19,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:24:19,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:19,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:24:19,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:19,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391051834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:19,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:19,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 21:24:19,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215309634] [2021-06-05 21:24:19,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:24:19,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:19,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:24:19,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:24:19,238 INFO L87 Difference]: Start difference. First operand 162219 states and 646057 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:21,245 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-06-05 21:24:23,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:23,175 INFO L93 Difference]: Finished difference Result 199263 states and 761120 transitions. [2021-06-05 21:24:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-06-05 21:24:23,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 21:24:23,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:23,752 INFO L225 Difference]: With dead ends: 199263 [2021-06-05 21:24:23,752 INFO L226 Difference]: Without dead ends: 199227 [2021-06-05 21:24:23,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5336 ImplicationChecksByTransitivity, 2192.3ms TimeCoverageRelationStatistics Valid=3514, Invalid=10528, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 21:24:23,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199227 states. [2021-06-05 21:24:27,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199227 to 162572. [2021-06-05 21:24:27,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162572 states, 162571 states have (on average 3.9801133043408727) internal successors, (647051), 162571 states have internal predecessors, (647051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162572 states to 162572 states and 647051 transitions. [2021-06-05 21:24:28,853 INFO L78 Accepts]: Start accepts. Automaton has 162572 states and 647051 transitions. Word has length 29 [2021-06-05 21:24:28,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:28,853 INFO L482 AbstractCegarLoop]: Abstraction has 162572 states and 647051 transitions. [2021-06-05 21:24:28,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 162572 states and 647051 transitions. [2021-06-05 21:24:29,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:24:29,203 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:29,203 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:29,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-05 21:24:29,403 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:29,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1092255906, now seen corresponding path program 69 times [2021-06-05 21:24:29,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:29,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861045034] [2021-06-05 21:24:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:29,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:29,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:29,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861045034] [2021-06-05 21:24:29,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861045034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:29,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032582390] [2021-06-05 21:24:29,429 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:29,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 21:24:29,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:29,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 21:24:29,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:29,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032582390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:29,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:29,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-06-05 21:24:29,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673445872] [2021-06-05 21:24:29,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 21:24:29,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:29,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 21:24:29,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 21:24:29,515 INFO L87 Difference]: Start difference. First operand 162572 states and 647051 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 21:24:31,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:31,066 INFO L93 Difference]: Finished difference Result 179863 states and 699357 transitions. [2021-06-05 21:24:31,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 21:24:31,067 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 21:24:31,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:31,603 INFO L225 Difference]: With dead ends: 179863 [2021-06-05 21:24:31,603 INFO L226 Difference]: Without dead ends: 179855 [2021-06-05 21:24:31,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-05 21:24:31,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179855 states. [2021-06-05 21:24:35,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179855 to 157188. [2021-06-05 21:24:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157188 states, 157187 states have (on average 3.9769891912181032) internal successors, (625131), 157187 states have internal predecessors, (625131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:35,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157188 states to 157188 states and 625131 transitions. [2021-06-05 21:24:35,873 INFO L78 Accepts]: Start accepts. Automaton has 157188 states and 625131 transitions. Word has length 29 [2021-06-05 21:24:35,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:35,873 INFO L482 AbstractCegarLoop]: Abstraction has 157188 states and 625131 transitions. [2021-06-05 21:24:35,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 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 21:24:35,873 INFO L276 IsEmpty]: Start isEmpty. Operand 157188 states and 625131 transitions. [2021-06-05 21:24:36,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:24:36,842 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:36,842 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:37,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:37,043 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:37,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:37,043 INFO L82 PathProgramCache]: Analyzing trace with hash -96815142, now seen corresponding path program 70 times [2021-06-05 21:24:37,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:37,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978633292] [2021-06-05 21:24:37,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:37,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:37,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978633292] [2021-06-05 21:24:37,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978633292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:37,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541404433] [2021-06-05 21:24:37,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:37,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:24:37,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:37,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:24:37,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:37,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541404433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:37,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:37,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 21:24:37,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819098788] [2021-06-05 21:24:37,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:24:37,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:37,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:24:37,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:24:37,229 INFO L87 Difference]: Start difference. First operand 157188 states and 625131 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:24:40,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:40,029 INFO L93 Difference]: Finished difference Result 173737 states and 676487 transitions. [2021-06-05 21:24:40,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 21:24:40,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:24:40,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:40,545 INFO L225 Difference]: With dead ends: 173737 [2021-06-05 21:24:40,545 INFO L226 Difference]: Without dead ends: 173688 [2021-06-05 21:24:40,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2763 ImplicationChecksByTransitivity, 1230.2ms TimeCoverageRelationStatistics Valid=1953, Invalid=5703, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 21:24:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173688 states. [2021-06-05 21:24:44,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173688 to 157440. [2021-06-05 21:24:44,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157440 states, 157439 states have (on average 3.9764924828028634) internal successors, (626055), 157439 states have internal predecessors, (626055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:45,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157440 states to 157440 states and 626055 transitions. [2021-06-05 21:24:45,413 INFO L78 Accepts]: Start accepts. Automaton has 157440 states and 626055 transitions. Word has length 29 [2021-06-05 21:24:45,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:45,414 INFO L482 AbstractCegarLoop]: Abstraction has 157440 states and 626055 transitions. [2021-06-05 21:24:45,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:24:45,414 INFO L276 IsEmpty]: Start isEmpty. Operand 157440 states and 626055 transitions. [2021-06-05 21:24:45,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:24:45,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:45,752 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:45,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:45,952 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:45,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:45,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1007779550, now seen corresponding path program 71 times [2021-06-05 21:24:45,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:45,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409704895] [2021-06-05 21:24:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:45,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:45,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409704895] [2021-06-05 21:24:45,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409704895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:45,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313533781] [2021-06-05 21:24:45,982 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:46,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 21:24:46,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:46,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:24:46,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:46,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313533781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:46,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:46,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 21:24:46,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249675842] [2021-06-05 21:24:46,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:24:46,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:46,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:24:46,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:24:46,140 INFO L87 Difference]: Start difference. First operand 157440 states and 626055 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 21:24:47,910 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2021-06-05 21:24:50,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:50,037 INFO L93 Difference]: Finished difference Result 176242 states and 683213 transitions. [2021-06-05 21:24:50,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-06-05 21:24:50,038 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 21:24:50,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:24:50,678 INFO L225 Difference]: With dead ends: 176242 [2021-06-05 21:24:50,678 INFO L226 Difference]: Without dead ends: 176200 [2021-06-05 21:24:50,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5958 ImplicationChecksByTransitivity, 2355.0ms TimeCoverageRelationStatistics Valid=3680, Invalid=11572, Unknown=0, NotChecked=0, Total=15252 [2021-06-05 21:24:50,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176200 states. [2021-06-05 21:24:54,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176200 to 156850. [2021-06-05 21:24:54,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156850 states, 156849 states have (on average 3.9759258905061556) internal successors, (623620), 156849 states have internal predecessors, (623620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:24:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156850 states to 156850 states and 623620 transitions. [2021-06-05 21:24:55,722 INFO L78 Accepts]: Start accepts. Automaton has 156850 states and 623620 transitions. Word has length 29 [2021-06-05 21:24:55,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:24:55,723 INFO L482 AbstractCegarLoop]: Abstraction has 156850 states and 623620 transitions. [2021-06-05 21:24:55,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 21:24:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 156850 states and 623620 transitions. [2021-06-05 21:24:56,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:24:56,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:24:56,056 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:24:56,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:56,256 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:24:56,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:24:56,257 INFO L82 PathProgramCache]: Analyzing trace with hash -58871326, now seen corresponding path program 72 times [2021-06-05 21:24:56,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:24:56,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127325338] [2021-06-05 21:24:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:24:56,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:24:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:56,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:24:56,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127325338] [2021-06-05 21:24:56,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127325338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:56,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856936103] [2021-06-05 21:24:56,292 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:24:56,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 21:24:56,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:24:56,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:24:56,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:24:56,447 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:24:56,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856936103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:24:56,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:24:56,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 21:24:56,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668492630] [2021-06-05 21:24:56,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:24:56,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:24:56,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:24:56,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:24:56,448 INFO L87 Difference]: Start difference. First operand 156850 states and 623620 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:24:59,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:24:59,054 INFO L93 Difference]: Finished difference Result 189385 states and 738233 transitions. [2021-06-05 21:24:59,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 21:24:59,054 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:24:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:00,070 INFO L225 Difference]: With dead ends: 189385 [2021-06-05 21:25:00,070 INFO L226 Difference]: Without dead ends: 189280 [2021-06-05 21:25:00,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 944.6ms TimeCoverageRelationStatistics Valid=1262, Invalid=3994, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 21:25:00,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189280 states. [2021-06-05 21:25:03,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189280 to 168281. [2021-06-05 21:25:04,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168281 states, 168280 states have (on average 3.9892857142857143) internal successors, (671317), 168280 states have internal predecessors, (671317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:05,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168281 states to 168281 states and 671317 transitions. [2021-06-05 21:25:05,311 INFO L78 Accepts]: Start accepts. Automaton has 168281 states and 671317 transitions. Word has length 29 [2021-06-05 21:25:05,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:05,311 INFO L482 AbstractCegarLoop]: Abstraction has 168281 states and 671317 transitions. [2021-06-05 21:25:05,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:25:05,311 INFO L276 IsEmpty]: Start isEmpty. Operand 168281 states and 671317 transitions. [2021-06-05 21:25:05,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:25:05,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:05,730 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:05,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2021-06-05 21:25:05,941 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:05,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:05,941 INFO L82 PathProgramCache]: Analyzing trace with hash 475018206, now seen corresponding path program 73 times [2021-06-05 21:25:05,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:05,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134258797] [2021-06-05 21:25:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:05,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:05,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134258797] [2021-06-05 21:25:05,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134258797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:05,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776935239] [2021-06-05 21:25:05,974 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:05,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:05,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:06,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776935239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:06,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:06,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 21:25:06,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28353528] [2021-06-05 21:25:06,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:25:06,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:06,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:25:06,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:06,125 INFO L87 Difference]: Start difference. First operand 168281 states and 671317 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:25:09,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:09,112 INFO L93 Difference]: Finished difference Result 192858 states and 749045 transitions. [2021-06-05 21:25:09,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-06-05 21:25:09,113 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:25:09,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:10,071 INFO L225 Difference]: With dead ends: 192858 [2021-06-05 21:25:10,071 INFO L226 Difference]: Without dead ends: 192816 [2021-06-05 21:25:10,071 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3214 ImplicationChecksByTransitivity, 1727.0ms TimeCoverageRelationStatistics Valid=2133, Invalid=6609, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 21:25:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192816 states. [2021-06-05 21:25:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192816 to 170649. [2021-06-05 21:25:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170649 states, 170648 states have (on average 3.9815878299188974) internal successors, (679450), 170648 states have internal predecessors, (679450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:15,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170649 states to 170649 states and 679450 transitions. [2021-06-05 21:25:15,261 INFO L78 Accepts]: Start accepts. Automaton has 170649 states and 679450 transitions. Word has length 29 [2021-06-05 21:25:15,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:15,262 INFO L482 AbstractCegarLoop]: Abstraction has 170649 states and 679450 transitions. [2021-06-05 21:25:15,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 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 21:25:15,262 INFO L276 IsEmpty]: Start isEmpty. Operand 170649 states and 679450 transitions. [2021-06-05 21:25:15,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:25:15,659 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:15,659 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:15,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:15,860 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:15,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:15,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1579612898, now seen corresponding path program 74 times [2021-06-05 21:25:15,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:15,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681779622] [2021-06-05 21:25:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:15,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:15,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681779622] [2021-06-05 21:25:15,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681779622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:15,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022494587] [2021-06-05 21:25:15,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:15,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 21:25:15,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:15,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:15,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:16,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022494587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:16,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:16,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 21:25:16,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168372107] [2021-06-05 21:25:16,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 21:25:16,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:16,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 21:25:16,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 21:25:16,044 INFO L87 Difference]: Start difference. First operand 170649 states and 679450 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 21:25:19,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:19,989 INFO L93 Difference]: Finished difference Result 194356 states and 752855 transitions. [2021-06-05 21:25:19,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-06-05 21:25:19,989 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 21:25:19,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:20,538 INFO L225 Difference]: With dead ends: 194356 [2021-06-05 21:25:20,538 INFO L226 Difference]: Without dead ends: 194308 [2021-06-05 21:25:20,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5804 ImplicationChecksByTransitivity, 1878.4ms TimeCoverageRelationStatistics Valid=3536, Invalid=10984, Unknown=0, NotChecked=0, Total=14520 [2021-06-05 21:25:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194308 states. [2021-06-05 21:25:24,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194308 to 166411. [2021-06-05 21:25:24,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166411 states, 166410 states have (on average 3.9824950423652425) internal successors, (662727), 166410 states have internal predecessors, (662727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:25,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166411 states to 166411 states and 662727 transitions. [2021-06-05 21:25:25,629 INFO L78 Accepts]: Start accepts. Automaton has 166411 states and 662727 transitions. Word has length 29 [2021-06-05 21:25:25,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:25,629 INFO L482 AbstractCegarLoop]: Abstraction has 166411 states and 662727 transitions. [2021-06-05 21:25:25,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 21:25:25,629 INFO L276 IsEmpty]: Start isEmpty. Operand 166411 states and 662727 transitions. [2021-06-05 21:25:25,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:25:25,984 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:25,984 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:26,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 21:25:26,184 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:26,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:26,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1240727522, now seen corresponding path program 75 times [2021-06-05 21:25:26,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:26,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262712982] [2021-06-05 21:25:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:26,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:26,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262712982] [2021-06-05 21:25:26,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262712982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:26,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892643352] [2021-06-05 21:25:26,222 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:26,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 21:25:26,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:26,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:26,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:26,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892643352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:26,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:26,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 21:25:26,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958079133] [2021-06-05 21:25:26,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:25:26,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:26,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:25:26,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:25:26,378 INFO L87 Difference]: Start difference. First operand 166411 states and 662727 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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 21:25:28,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:28,946 INFO L93 Difference]: Finished difference Result 195594 states and 760997 transitions. [2021-06-05 21:25:28,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 21:25:28,946 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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 21:25:28,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 21:25:29,922 INFO L225 Difference]: With dead ends: 195594 [2021-06-05 21:25:29,923 INFO L226 Difference]: Without dead ends: 195489 [2021-06-05 21:25:29,923 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 943.8ms TimeCoverageRelationStatistics Valid=1235, Invalid=4021, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 21:25:30,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195489 states. [2021-06-05 21:25:33,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195489 to 173928. [2021-06-05 21:25:34,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173928 states, 173927 states have (on average 3.986448337520914) internal successors, (693351), 173927 states have internal predecessors, (693351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 21:25:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173928 states to 173928 states and 693351 transitions. [2021-06-05 21:25:35,301 INFO L78 Accepts]: Start accepts. Automaton has 173928 states and 693351 transitions. Word has length 29 [2021-06-05 21:25:35,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 21:25:35,301 INFO L482 AbstractCegarLoop]: Abstraction has 173928 states and 693351 transitions. [2021-06-05 21:25:35,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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 21:25:35,301 INFO L276 IsEmpty]: Start isEmpty. Operand 173928 states and 693351 transitions. [2021-06-05 21:25:35,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 21:25:35,660 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 21:25:35,660 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 21:25:35,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:35,861 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 21:25:35,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 21:25:35,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1087507746, now seen corresponding path program 76 times [2021-06-05 21:25:35,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 21:25:35,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705609292] [2021-06-05 21:25:35,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 21:25:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 21:25:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:35,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 21:25:35,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705609292] [2021-06-05 21:25:35,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705609292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:35,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488457422] [2021-06-05 21:25:35,905 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 21:25:35,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 21:25:35,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 21:25:35,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 21:25:35,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 21:25:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 21:25:36,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488457422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 21:25:36,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 21:25:36,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 21:25:36,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126889912] [2021-06-05 21:25:36,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 21:25:36,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 21:25:36,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 21:25:36,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 21:25:36,058 INFO L87 Difference]: Start difference. First operand 173928 states and 693351 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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 21:25:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 21:25:39,423 INFO L93 Difference]: Finished difference Result 196489 states and 763908 transitions. [2021-06-05 21:25:39,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-06-05 21:25:39,424 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 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 21:25:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... [2021-06-05 21:25:39,998 INFO L225 Difference]: With dead ends: 196489 [2021-06-05 21:25:39,998 INFO L226 Difference]: Without dead ends: 196370 [2021-06-05 21:25:39,999 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3093 ImplicationChecksByTransitivity, 1303.8ms TimeCoverageRelationStatistics Valid=1989, Invalid=6383, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 21:25:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196370 states. [2021-06-05 21:25:40,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 21:25:40,397 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 21:25:40,399 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 21:25:40,400 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 21:25:40,401 INFO L202 PluginConnector]: Adding new model mult-dist.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 09:25:40 BasicIcfg [2021-06-05 21:25:40,401 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 21:25:40,401 INFO L168 Benchmark]: Toolchain (without parser) took 743725.05 ms. Allocated memory was 381.7 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 361.2 MB in the beginning and 9.0 GB in the end (delta: -8.6 GB). Peak memory consumption was 7.4 GB. Max. memory is 16.0 GB. [2021-06-05 21:25:40,401 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 381.7 MB. Free memory was 362.4 MB in the beginning and 362.3 MB in the end (delta: 69.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 21:25:40,401 INFO L168 Benchmark]: Boogie Procedure Inliner took 16.84 ms. Allocated memory is still 381.7 MB. Free memory was 361.1 MB in the beginning and 359.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:25:40,401 INFO L168 Benchmark]: Boogie Preprocessor took 14.11 ms. Allocated memory is still 381.7 MB. Free memory was 359.7 MB in the beginning and 358.7 MB in the end (delta: 972.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 21:25:40,401 INFO L168 Benchmark]: RCFGBuilder took 255.25 ms. Allocated memory is still 381.7 MB. Free memory was 358.6 MB in the beginning and 346.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 21:25:40,401 INFO L168 Benchmark]: TraceAbstraction took 743435.60 ms. Allocated memory was 381.7 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 345.5 MB in the beginning and 9.0 GB in the end (delta: -8.6 GB). Peak memory consumption was 7.4 GB. Max. memory is 16.0 GB. [2021-06-05 21:25:40,401 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 0.10 ms. Allocated memory is still 381.7 MB. Free memory was 362.4 MB in the beginning and 362.3 MB in the end (delta: 69.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 16.84 ms. Allocated memory is still 381.7 MB. Free memory was 361.1 MB in the beginning and 359.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.11 ms. Allocated memory is still 381.7 MB. Free memory was 359.7 MB in the beginning and 358.7 MB in the end (delta: 972.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 255.25 ms. Allocated memory is still 381.7 MB. Free memory was 358.6 MB in the beginning and 346.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 743435.60 ms. Allocated memory was 381.7 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 345.5 MB in the beginning and 9.0 GB in the end (delta: -8.6 GB). Peak memory consumption was 7.4 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 63]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 39 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 743371.5ms, OverallIterations: 268, TraceHistogramMax: 4, EmptinessCheckTime: 28087.9ms, AutomataDifference: 321372.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 43.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11793 SDtfs, 76532 SDslu, 95302 SDs, 0 SdLazy, 128872 SolverSat, 13885 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 54374.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16677 GetRequests, 4885 SyntacticMatches, 8 SemanticMatches, 11784 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247982 ImplicationChecksByTransitivity, 154928.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=173928occurred in iteration=267, InterpolantAutomatonStates: 10779, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 294741.8ms AutomataMinimizationTime, 268 MinimizatonAttempts, 2332806 StatesRemovedByMinimization, 267 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 755.0ms SsaConstructionTime, 3041.1ms SatisfiabilityAnalysisTime, 36719.2ms InterpolantComputationTime, 12922 NumberOfCodeBlocks, 12917 NumberOfCodeBlocksAsserted, 925 NumberOfCheckSat, 12394 ConstructedInterpolants, 0 QuantifiedInterpolants, 96298 SizeOfPredicates, 1449 NumberOfNonLiveVariables, 18962 ConjunctsInSsa, 2837 ConjunctsInUnsatCore, 528 InterpolantComputations, 8 PerfectInterpolantSequences, 1814/5745 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