/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp1x3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:08:25,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:08:25,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:08:25,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:08:25,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 14:08:25,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 14:08:25,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 14:08:25,619 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 14:08:25,646 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:08:25,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:08:25,646 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:08:25,646 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:08:25,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:08:25,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:08:25,648 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:08:25,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:08:25,648 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:08:25,648 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:08:25,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:08:25,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:08:25,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:08:25,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:08:25,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:08:25,649 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:08:25,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:08:25,649 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:08:25,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:08:25,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:08:25,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:08:25,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:08:25,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:08:25,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:08:25,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:08:25,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:08:25,650 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:08:25,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:08:25,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:08:25,651 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:08:25,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:08:25,651 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:08:25,651 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:08:25,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:08:25,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:08:25,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:08:25,969 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:08:25,970 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:08:25,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp1x3.wvr.bpl [2021-06-05 14:08:25,978 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/bench/exp1x3.wvr.bpl' [2021-06-05 14:08:26,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:08:26,004 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:08:26,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:08:26,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:08:26,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:08:26,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:08:26" (1/1) ... [2021-06-05 14:08:26,027 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:08:26" (1/1) ... [2021-06-05 14:08:26,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:08:26,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:08:26,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:08:26,035 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:08:26,040 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:08:26" (1/1) ... [2021-06-05 14:08:26,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:08:26" (1/1) ... [2021-06-05 14:08:26,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:08:26" (1/1) ... [2021-06-05 14:08:26,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:08:26" (1/1) ... [2021-06-05 14:08:26,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:08:26" (1/1) ... [2021-06-05 14:08:26,044 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:08:26" (1/1) ... [2021-06-05 14:08:26,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:08:26" (1/1) ... [2021-06-05 14:08:26,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:08:26,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:08:26,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:08:26,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:08:26,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:08:26" (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 14:08:26,101 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:08:26,102 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:08:26,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:08:26,102 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:08:26,102 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:08:26,102 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:08:26,102 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:08:26,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:08:26,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:08:26,103 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 14:08:26,252 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:08:26,253 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 14:08:26,254 INFO L202 PluginConnector]: Adding new model exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:08:26 BoogieIcfgContainer [2021-06-05 14:08:26,255 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:08:26,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:08:26,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:08:26,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:08:26,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:08:26" (1/2) ... [2021-06-05 14:08:26,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58f280c7 and model type exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:08:26, skipping insertion in model container [2021-06-05 14:08:26,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:08:26" (2/2) ... [2021-06-05 14:08:26,265 INFO L111 eAbstractionObserver]: Analyzing ICFG exp1x3.wvr.bpl [2021-06-05 14:08:26,275 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:08:26,276 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:08:26,276 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:08:26,277 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:08:26,342 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 14:08:26,370 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 14:08:26,399 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:08:26,399 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:08:26,399 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:08:26,400 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:08:26,400 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:08:26,400 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:08:26,400 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:08:26,400 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:08:26,412 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-06-05 14:08:26,424 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:26,426 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:26,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 14:08:26,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:26,440 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:26,441 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:26,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:26,447 INFO L82 PathProgramCache]: Analyzing trace with hash -64585232, now seen corresponding path program 1 times [2021-06-05 14:08:26,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:26,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565848336] [2021-06-05 14:08:26,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:26,589 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 14:08:26,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:26,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565848336] [2021-06-05 14:08:26,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565848336] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:08:26,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:08:26,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 14:08:26,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132790047] [2021-06-05 14:08:26,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:08:26,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:26,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:08:26,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:08:26,611 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:26,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:26,699 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-06-05 14:08:26,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:08:26,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 14:08:26,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:26,708 INFO L225 Difference]: With dead ends: 54 [2021-06-05 14:08:26,709 INFO L226 Difference]: Without dead ends: 47 [2021-06-05 14:08:26,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:08:26,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-06-05 14:08:26,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-06-05 14:08:26,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:26,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-06-05 14:08:26,763 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-06-05 14:08:26,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:26,764 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-06-05 14:08:26,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:26,764 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-06-05 14:08:26,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:08:26,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:26,765 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:26,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:08:26,766 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:26,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:26,766 INFO L82 PathProgramCache]: Analyzing trace with hash 732040690, now seen corresponding path program 1 times [2021-06-05 14:08:26,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:26,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544536069] [2021-06-05 14:08:26,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:26,872 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 14:08:26,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:26,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544536069] [2021-06-05 14:08:26,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544536069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:26,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788481646] [2021-06-05 14:08:26,873 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 14:08:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:26,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 14:08:26,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:26,973 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 14:08:26,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788481646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:26,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:26,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-06-05 14:08:26,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946261481] [2021-06-05 14:08:26,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:08:26,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:26,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:08:26,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:08:26,977 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:27,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:27,028 INFO L93 Difference]: Finished difference Result 68 states and 120 transitions. [2021-06-05 14:08:27,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:08:27,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:08:27,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:27,030 INFO L225 Difference]: With dead ends: 68 [2021-06-05 14:08:27,030 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 14:08:27,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:08:27,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 14:08:27,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2021-06-05 14:08:27,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-06-05 14:08:27,039 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-06-05 14:08:27,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:27,039 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-06-05 14:08:27,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:27,040 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-06-05 14:08:27,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:08:27,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:27,040 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:27,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 14:08:27,257 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:27,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:27,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1434845998, now seen corresponding path program 1 times [2021-06-05 14:08:27,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:27,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363434758] [2021-06-05 14:08:27,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:27,338 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 14:08:27,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:27,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363434758] [2021-06-05 14:08:27,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363434758] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:08:27,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:08:27,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:08:27,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754082711] [2021-06-05 14:08:27,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:08:27,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:27,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:08:27,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:08:27,341 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:27,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:27,372 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2021-06-05 14:08:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:08:27,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:08:27,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:27,374 INFO L225 Difference]: With dead ends: 47 [2021-06-05 14:08:27,374 INFO L226 Difference]: Without dead ends: 40 [2021-06-05 14:08:27,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:08:27,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-05 14:08:27,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2021-06-05 14:08:27,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 69 transitions. [2021-06-05 14:08:27,381 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 69 transitions. Word has length 13 [2021-06-05 14:08:27,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:27,381 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 69 transitions. [2021-06-05 14:08:27,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:27,381 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 69 transitions. [2021-06-05 14:08:27,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:08:27,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:27,382 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:27,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 14:08:27,382 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:27,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:27,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1306103410, now seen corresponding path program 2 times [2021-06-05 14:08:27,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:27,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902255908] [2021-06-05 14:08:27,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:27,451 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 14:08:27,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:27,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902255908] [2021-06-05 14:08:27,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902255908] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:08:27,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:08:27,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:08:27,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968468332] [2021-06-05 14:08:27,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:08:27,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:27,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:08:27,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:08:27,457 INFO L87 Difference]: Start difference. First operand 37 states and 69 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:27,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:27,502 INFO L93 Difference]: Finished difference Result 44 states and 83 transitions. [2021-06-05 14:08:27,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:08:27,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:08:27,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:27,505 INFO L225 Difference]: With dead ends: 44 [2021-06-05 14:08:27,505 INFO L226 Difference]: Without dead ends: 44 [2021-06-05 14:08:27,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:08:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-06-05 14:08:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-06-05 14:08:27,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:27,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2021-06-05 14:08:27,516 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 13 [2021-06-05 14:08:27,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:27,516 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2021-06-05 14:08:27,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2021-06-05 14:08:27,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:08:27,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:27,517 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:27,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 14:08:27,517 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:27,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:27,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1806788944, now seen corresponding path program 1 times [2021-06-05 14:08:27,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:27,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104196953] [2021-06-05 14:08:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:27,590 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 14:08:27,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:27,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104196953] [2021-06-05 14:08:27,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104196953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:27,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32501992] [2021-06-05 14:08:27,591 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 14:08:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:27,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:27,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:27,745 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 14:08:27,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32501992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:27,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:27,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 4 [2021-06-05 14:08:27,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784870575] [2021-06-05 14:08:27,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:08:27,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:27,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:08:27,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:08:27,747 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:27,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:27,792 INFO L93 Difference]: Finished difference Result 97 states and 185 transitions. [2021-06-05 14:08:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:08:27,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have 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 14:08:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:27,794 INFO L225 Difference]: With dead ends: 97 [2021-06-05 14:08:27,794 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 14:08:27,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:08:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 14:08:27,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2021-06-05 14:08:27,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 136 transitions. [2021-06-05 14:08:27,802 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 136 transitions. Word has length 15 [2021-06-05 14:08:27,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:27,802 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 136 transitions. [2021-06-05 14:08:27,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 136 transitions. [2021-06-05 14:08:27,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:08:27,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:27,804 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:28,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:28,026 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:28,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:28,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1307356592, now seen corresponding path program 2 times [2021-06-05 14:08:28,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:28,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844590146] [2021-06-05 14:08:28,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:08:28,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:28,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844590146] [2021-06-05 14:08:28,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844590146] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:08:28,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:08:28,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:08:28,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740967996] [2021-06-05 14:08:28,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:08:28,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:28,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:08:28,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:08:28,083 INFO L87 Difference]: Start difference. First operand 66 states and 136 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 14:08:28,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:28,126 INFO L93 Difference]: Finished difference Result 115 states and 230 transitions. [2021-06-05 14:08:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:08:28,127 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 14:08:28,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:28,129 INFO L225 Difference]: With dead ends: 115 [2021-06-05 14:08:28,135 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 14:08:28,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:08:28,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 14:08:28,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2021-06-05 14:08:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1707317073170733) internal successors, (178), 82 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:28,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 178 transitions. [2021-06-05 14:08:28,154 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 178 transitions. Word has length 15 [2021-06-05 14:08:28,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:28,155 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 178 transitions. [2021-06-05 14:08:28,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 14:08:28,155 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 178 transitions. [2021-06-05 14:08:28,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:08:28,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:28,156 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:28,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 14:08:28,156 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:28,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:28,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1128288690, now seen corresponding path program 3 times [2021-06-05 14:08:28,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:28,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034499325] [2021-06-05 14:08:28,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:28,190 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 14:08:28,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:28,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034499325] [2021-06-05 14:08:28,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034499325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:28,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047302342] [2021-06-05 14:08:28,191 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 14:08:28,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:08:28,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:28,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:08:28,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:28,415 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 14:08:28,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047302342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:28,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:28,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:08:28,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811909583] [2021-06-05 14:08:28,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:08:28,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:28,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:08:28,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:08:28,417 INFO L87 Difference]: Start difference. First operand 83 states and 178 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:28,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:28,694 INFO L93 Difference]: Finished difference Result 164 states and 313 transitions. [2021-06-05 14:08:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:08:28,694 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:08:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:28,696 INFO L225 Difference]: With dead ends: 164 [2021-06-05 14:08:28,696 INFO L226 Difference]: Without dead ends: 164 [2021-06-05 14:08:28,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:08:28,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-06-05 14:08:28,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 80. [2021-06-05 14:08:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 14:08:28,703 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 17 [2021-06-05 14:08:28,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:28,703 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 14:08:28,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:28,703 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 14:08:28,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:08:28,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:28,704 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:28,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:28,921 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:28,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:28,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2080643090, now seen corresponding path program 4 times [2021-06-05 14:08:28,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:28,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420978123] [2021-06-05 14:08:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:28,951 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 14:08:28,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:28,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420978123] [2021-06-05 14:08:28,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420978123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:28,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575451566] [2021-06-05 14:08:28,952 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 14:08:28,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:28,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:28,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:08:28,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:29,069 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 14:08:29,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575451566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:29,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:29,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:08:29,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281927087] [2021-06-05 14:08:29,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:08:29,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:29,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:08:29,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:08:29,071 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:29,229 INFO L93 Difference]: Finished difference Result 167 states and 311 transitions. [2021-06-05 14:08:29,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:08:29,230 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:08:29,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:29,231 INFO L225 Difference]: With dead ends: 167 [2021-06-05 14:08:29,231 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 14:08:29,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:29,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 14:08:29,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-06-05 14:08:29,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.1553398058252426) internal successors, (222), 103 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 222 transitions. [2021-06-05 14:08:29,238 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 222 transitions. Word has length 17 [2021-06-05 14:08:29,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:29,239 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 222 transitions. [2021-06-05 14:08:29,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:29,239 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 222 transitions. [2021-06-05 14:08:29,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:08:29,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:29,240 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:29,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:29,465 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:29,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:29,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1781820862, now seen corresponding path program 5 times [2021-06-05 14:08:29,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:29,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348872976] [2021-06-05 14:08:29,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:29,502 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 14:08:29,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:29,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348872976] [2021-06-05 14:08:29,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348872976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:29,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141631174] [2021-06-05 14:08:29,503 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 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 14:08:29,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:08:29,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:29,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:08:29,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:29,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141631174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:29,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:29,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:08:29,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495519202] [2021-06-05 14:08:29,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:08:29,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:29,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:08:29,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:08:29,642 INFO L87 Difference]: Start difference. First operand 104 states and 222 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:29,784 INFO L93 Difference]: Finished difference Result 147 states and 286 transitions. [2021-06-05 14:08:29,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:08:29,785 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:08:29,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:29,786 INFO L225 Difference]: With dead ends: 147 [2021-06-05 14:08:29,786 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 14:08:29,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:29,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 14:08:29,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 103. [2021-06-05 14:08:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.127450980392157) internal successors, (217), 102 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:29,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 217 transitions. [2021-06-05 14:08:29,792 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 217 transitions. Word has length 17 [2021-06-05 14:08:29,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:29,793 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 217 transitions. [2021-06-05 14:08:29,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:29,793 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 217 transitions. [2021-06-05 14:08:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:08:29,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:29,795 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:30,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:30,013 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:30,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:30,013 INFO L82 PathProgramCache]: Analyzing trace with hash 397922780, now seen corresponding path program 6 times [2021-06-05 14:08:30,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:30,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381084587] [2021-06-05 14:08:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:30,050 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 14:08:30,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:30,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381084587] [2021-06-05 14:08:30,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381084587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:30,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750576200] [2021-06-05 14:08:30,051 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 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 14:08:30,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:08:30,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:30,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:08:30,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:30,157 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 14:08:30,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750576200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:30,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:30,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:08:30,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796741839] [2021-06-05 14:08:30,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:08:30,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:30,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:08:30,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:08:30,159 INFO L87 Difference]: Start difference. First operand 103 states and 217 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:30,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:30,246 INFO L93 Difference]: Finished difference Result 114 states and 233 transitions. [2021-06-05 14:08:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:08:30,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:08:30,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:30,247 INFO L225 Difference]: With dead ends: 114 [2021-06-05 14:08:30,247 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 14:08:30,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:08:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 14:08:30,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 103. [2021-06-05 14:08:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.1176470588235294) internal successors, (216), 102 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 216 transitions. [2021-06-05 14:08:30,253 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 216 transitions. Word has length 17 [2021-06-05 14:08:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:30,253 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 216 transitions. [2021-06-05 14:08:30,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:30,253 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 216 transitions. [2021-06-05 14:08:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:08:30,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:30,254 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:30,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:30,478 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:30,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:30,478 INFO L82 PathProgramCache]: Analyzing trace with hash 613173682, now seen corresponding path program 7 times [2021-06-05 14:08:30,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:30,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237333353] [2021-06-05 14:08:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:30,511 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 14:08:30,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:30,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237333353] [2021-06-05 14:08:30,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237333353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:30,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913412333] [2021-06-05 14:08:30,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:08:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:30,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:08:30,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:30,621 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 14:08:30,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913412333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:30,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:30,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:08:30,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400067180] [2021-06-05 14:08:30,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:08:30,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:30,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:08:30,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:08:30,623 INFO L87 Difference]: Start difference. First operand 103 states and 216 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 14:08:30,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:30,765 INFO L93 Difference]: Finished difference Result 208 states and 409 transitions. [2021-06-05 14:08:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:08:30,766 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 17 [2021-06-05 14:08:30,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:30,767 INFO L225 Difference]: With dead ends: 208 [2021-06-05 14:08:30,767 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 14:08:30,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:30,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 14:08:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 124. [2021-06-05 14:08:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.186991869918699) internal successors, (269), 123 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 269 transitions. [2021-06-05 14:08:30,773 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 269 transitions. Word has length 17 [2021-06-05 14:08:30,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:30,773 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 269 transitions. [2021-06-05 14:08:30,773 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 14:08:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 269 transitions. [2021-06-05 14:08:30,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:08:30,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:30,774 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:30,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:30,985 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:30,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:30,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1315978990, now seen corresponding path program 8 times [2021-06-05 14:08:30,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:30,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577226597] [2021-06-05 14:08:30,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:31,009 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 14:08:31,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:31,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577226597] [2021-06-05 14:08:31,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577226597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:31,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18037977] [2021-06-05 14:08:31,010 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:31,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:31,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:31,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:08:31,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:31,107 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 14:08:31,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18037977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:31,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:31,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:08:31,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901008450] [2021-06-05 14:08:31,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:08:31,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:31,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:08:31,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:08:31,109 INFO L87 Difference]: Start difference. First operand 124 states and 269 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 14:08:31,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:31,220 INFO L93 Difference]: Finished difference Result 145 states and 295 transitions. [2021-06-05 14:08:31,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:08:31,221 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 14:08:31,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:31,222 INFO L225 Difference]: With dead ends: 145 [2021-06-05 14:08:31,222 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 14:08:31,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:08:31,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 14:08:31,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2021-06-05 14:08:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.191666666666667) internal successors, (263), 120 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:31,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 263 transitions. [2021-06-05 14:08:31,233 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 263 transitions. Word has length 17 [2021-06-05 14:08:31,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:31,233 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 263 transitions. [2021-06-05 14:08:31,233 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 14:08:31,233 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 263 transitions. [2021-06-05 14:08:31,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:08:31,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:31,234 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:31,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-05 14:08:31,445 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:31,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:31,445 INFO L82 PathProgramCache]: Analyzing trace with hash 51051130, now seen corresponding path program 9 times [2021-06-05 14:08:31,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:31,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339231659] [2021-06-05 14:08:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:31,483 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 14:08:31,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:31,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339231659] [2021-06-05 14:08:31,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339231659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:31,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099538608] [2021-06-05 14:08:31,483 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 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 14:08:31,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:08:31,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:31,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:08:31,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:31,590 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 14:08:31,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099538608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:31,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:31,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:08:31,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007298501] [2021-06-05 14:08:31,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:08:31,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:31,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:08:31,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:08:31,592 INFO L87 Difference]: Start difference. First operand 121 states and 263 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 14:08:31,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:31,758 INFO L93 Difference]: Finished difference Result 165 states and 338 transitions. [2021-06-05 14:08:31,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:08:31,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 14:08:31,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:31,760 INFO L225 Difference]: With dead ends: 165 [2021-06-05 14:08:31,760 INFO L226 Difference]: Without dead ends: 165 [2021-06-05 14:08:31,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:08:31,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-06-05 14:08:31,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 123. [2021-06-05 14:08:31,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.19672131147541) internal successors, (268), 122 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:31,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 268 transitions. [2021-06-05 14:08:31,765 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 268 transitions. Word has length 17 [2021-06-05 14:08:31,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:31,765 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 268 transitions. [2021-06-05 14:08:31,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 14:08:31,765 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 268 transitions. [2021-06-05 14:08:31,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:08:31,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:31,766 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:31,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:31,981 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:31,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:31,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1332846952, now seen corresponding path program 10 times [2021-06-05 14:08:31,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:31,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804253032] [2021-06-05 14:08:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:32,012 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 14:08:32,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:32,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804253032] [2021-06-05 14:08:32,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804253032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:32,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678975336] [2021-06-05 14:08:32,012 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 14:08:32,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:32,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:32,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:08:32,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:32,103 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 14:08:32,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678975336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:32,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:32,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:08:32,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998022693] [2021-06-05 14:08:32,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:08:32,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:32,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:08:32,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:08:32,105 INFO L87 Difference]: Start difference. First operand 123 states and 268 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 14:08:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:32,224 INFO L93 Difference]: Finished difference Result 199 states and 385 transitions. [2021-06-05 14:08:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:08:32,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 14:08:32,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:32,225 INFO L225 Difference]: With dead ends: 199 [2021-06-05 14:08:32,225 INFO L226 Difference]: Without dead ends: 197 [2021-06-05 14:08:32,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 78.8ms TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:08:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-06-05 14:08:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 125. [2021-06-05 14:08:32,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.1774193548387095) internal successors, (270), 124 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 270 transitions. [2021-06-05 14:08:32,231 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 270 transitions. Word has length 17 [2021-06-05 14:08:32,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:32,231 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 270 transitions. [2021-06-05 14:08:32,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 14:08:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 270 transitions. [2021-06-05 14:08:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:08:32,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:32,232 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:32,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:32,445 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:32,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:32,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1145142718, now seen corresponding path program 11 times [2021-06-05 14:08:32,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:32,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670331846] [2021-06-05 14:08:32,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:32,470 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 14:08:32,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:32,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670331846] [2021-06-05 14:08:32,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670331846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:32,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072327764] [2021-06-05 14:08:32,470 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 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 14:08:32,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:08:32,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:32,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:08:32,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:32,549 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 14:08:32,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072327764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:32,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:32,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:08:32,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412317282] [2021-06-05 14:08:32,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:08:32,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:32,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:08:32,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:08:32,551 INFO L87 Difference]: Start difference. First operand 125 states and 270 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:32,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:32,769 INFO L93 Difference]: Finished difference Result 174 states and 367 transitions. [2021-06-05 14:08:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:08:32,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:08:32,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:32,771 INFO L225 Difference]: With dead ends: 174 [2021-06-05 14:08:32,771 INFO L226 Difference]: Without dead ends: 174 [2021-06-05 14:08:32,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:08:32,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-06-05 14:08:32,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 131. [2021-06-05 14:08:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1769230769230767) internal successors, (283), 130 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:32,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 283 transitions. [2021-06-05 14:08:32,784 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 283 transitions. Word has length 17 [2021-06-05 14:08:32,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:32,784 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 283 transitions. [2021-06-05 14:08:32,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:32,784 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 283 transitions. [2021-06-05 14:08:32,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:08:32,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:32,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:33,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 14:08:33,009 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:33,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1839193218, now seen corresponding path program 12 times [2021-06-05 14:08:33,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:33,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525061928] [2021-06-05 14:08:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:33,033 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 14:08:33,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:33,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525061928] [2021-06-05 14:08:33,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525061928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:33,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62403854] [2021-06-05 14:08:33,033 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:33,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:08:33,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:33,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 14:08:33,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:33,107 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 14:08:33,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62403854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:33,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:33,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:08:33,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025122467] [2021-06-05 14:08:33,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:08:33,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:33,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:08:33,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:08:33,108 INFO L87 Difference]: Start difference. First operand 131 states and 283 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:33,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:33,253 INFO L93 Difference]: Finished difference Result 205 states and 395 transitions. [2021-06-05 14:08:33,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:08:33,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:08:33,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:33,255 INFO L225 Difference]: With dead ends: 205 [2021-06-05 14:08:33,256 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 14:08:33,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:08:33,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 14:08:33,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 135. [2021-06-05 14:08:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1417910447761193) internal successors, (287), 134 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 287 transitions. [2021-06-05 14:08:33,261 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 287 transitions. Word has length 17 [2021-06-05 14:08:33,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:33,261 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 287 transitions. [2021-06-05 14:08:33,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:33,261 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 287 transitions. [2021-06-05 14:08:33,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:08:33,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:33,264 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:33,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 14:08:33,477 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1030417008, now seen corresponding path program 13 times [2021-06-05 14:08:33,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:33,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43564140] [2021-06-05 14:08:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:33,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:33,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43564140] [2021-06-05 14:08:33,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43564140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:33,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380710612] [2021-06-05 14:08:33,520 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 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 14:08:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:33,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:08:33,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:33,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380710612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:33,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:33,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-06-05 14:08:33,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878251065] [2021-06-05 14:08:33,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:08:33,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:33,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:08:33,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:08:33,642 INFO L87 Difference]: Start difference. First operand 135 states and 287 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 14:08:33,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:33,733 INFO L93 Difference]: Finished difference Result 224 states and 457 transitions. [2021-06-05 14:08:33,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:08:33,733 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 19 [2021-06-05 14:08:33,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:33,734 INFO L225 Difference]: With dead ends: 224 [2021-06-05 14:08:33,734 INFO L226 Difference]: Without dead ends: 217 [2021-06-05 14:08:33,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:08:33,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-06-05 14:08:33,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 175. [2021-06-05 14:08:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.1954022988505746) internal successors, (382), 174 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 382 transitions. [2021-06-05 14:08:33,741 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 382 transitions. Word has length 19 [2021-06-05 14:08:33,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:33,743 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 382 transitions. [2021-06-05 14:08:33,743 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 14:08:33,743 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 382 transitions. [2021-06-05 14:08:33,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:08:33,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:33,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:33,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 14:08:33,961 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:33,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1048749968, now seen corresponding path program 14 times [2021-06-05 14:08:33,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:33,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120578361] [2021-06-05 14:08:33,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:08:34,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:34,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120578361] [2021-06-05 14:08:34,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120578361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:34,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037771623] [2021-06-05 14:08:34,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:34,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:34,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:34,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:08:34,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:34,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037771623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:34,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:34,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-06-05 14:08:34,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182382934] [2021-06-05 14:08:34,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 14:08:34,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:34,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 14:08:34,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:08:34,165 INFO L87 Difference]: Start difference. First operand 175 states and 382 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 14:08:34,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:34,257 INFO L93 Difference]: Finished difference Result 276 states and 576 transitions. [2021-06-05 14:08:34,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:08:34,258 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 19 [2021-06-05 14:08:34,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:34,259 INFO L225 Difference]: With dead ends: 276 [2021-06-05 14:08:34,259 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 14:08:34,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:08:34,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 14:08:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 193. [2021-06-05 14:08:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.2552083333333335) internal successors, (433), 192 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 433 transitions. [2021-06-05 14:08:34,265 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 433 transitions. Word has length 19 [2021-06-05 14:08:34,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:34,265 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 433 transitions. [2021-06-05 14:08:34,265 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 14:08:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 433 transitions. [2021-06-05 14:08:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:08:34,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:34,266 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:34,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:34,489 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:34,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:34,489 INFO L82 PathProgramCache]: Analyzing trace with hash -588981648, now seen corresponding path program 15 times [2021-06-05 14:08:34,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:34,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437959375] [2021-06-05 14:08:34,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:34,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:08:34,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:34,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437959375] [2021-06-05 14:08:34,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437959375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:34,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576533150] [2021-06-05 14:08:34,524 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 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 14:08:34,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:08:34,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:34,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 14:08:34,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:34,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576533150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:34,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:34,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 6 [2021-06-05 14:08:34,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642470268] [2021-06-05 14:08:34,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:08:34,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:34,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:08:34,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:08:34,666 INFO L87 Difference]: Start difference. First operand 193 states and 433 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:34,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:34,750 INFO L93 Difference]: Finished difference Result 276 states and 592 transitions. [2021-06-05 14:08:34,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:08:34,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:08:34,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:34,752 INFO L225 Difference]: With dead ends: 276 [2021-06-05 14:08:34,752 INFO L226 Difference]: Without dead ends: 269 [2021-06-05 14:08:34,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:08:34,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-06-05 14:08:34,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 223. [2021-06-05 14:08:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.279279279279279) internal successors, (506), 222 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:34,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 506 transitions. [2021-06-05 14:08:34,759 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 506 transitions. Word has length 19 [2021-06-05 14:08:34,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:34,759 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 506 transitions. [2021-06-05 14:08:34,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 506 transitions. [2021-06-05 14:08:34,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:34,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:34,760 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:34,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:34,983 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:34,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:34,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1461933170, now seen corresponding path program 16 times [2021-06-05 14:08:34,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:34,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221033419] [2021-06-05 14:08:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:35,055 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 14:08:35,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:35,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221033419] [2021-06-05 14:08:35,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221033419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:35,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951490083] [2021-06-05 14:08:35,055 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 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 14:08:35,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:35,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:35,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:35,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:35,178 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 14:08:35,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951490083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:35,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:35,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:08:35,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009019337] [2021-06-05 14:08:35,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:08:35,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:35,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:08:35,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:08:35,179 INFO L87 Difference]: Start difference. First operand 223 states and 506 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 14:08:36,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:36,029 INFO L93 Difference]: Finished difference Result 437 states and 898 transitions. [2021-06-05 14:08:36,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 14:08:36,029 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 14:08:36,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:36,031 INFO L225 Difference]: With dead ends: 437 [2021-06-05 14:08:36,031 INFO L226 Difference]: Without dead ends: 437 [2021-06-05 14:08:36,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 560.5ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:08:36,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-05 14:08:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 183. [2021-06-05 14:08:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.2527472527472527) internal successors, (410), 182 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 410 transitions. [2021-06-05 14:08:36,038 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 410 transitions. Word has length 21 [2021-06-05 14:08:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:36,038 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 410 transitions. [2021-06-05 14:08:36,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 14:08:36,038 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 410 transitions. [2021-06-05 14:08:36,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:36,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:36,039 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:36,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:36,253 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:36,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:36,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1465011118, now seen corresponding path program 17 times [2021-06-05 14:08:36,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:36,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698474002] [2021-06-05 14:08:36,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:36,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:36,295 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 14:08:36,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:36,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698474002] [2021-06-05 14:08:36,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698474002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:36,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637518813] [2021-06-05 14:08:36,296 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 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 14:08:36,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:08:36,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:36,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:36,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:36,406 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 14:08:36,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637518813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:36,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:36,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:08:36,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531737636] [2021-06-05 14:08:36,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:08:36,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:36,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:08:36,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:08:36,407 INFO L87 Difference]: Start difference. First operand 183 states and 410 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 14:08:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:36,846 INFO L93 Difference]: Finished difference Result 414 states and 782 transitions. [2021-06-05 14:08:36,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:08:36,847 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 14:08:36,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:36,848 INFO L225 Difference]: With dead ends: 414 [2021-06-05 14:08:36,848 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 14:08:36,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:08:36,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 14:08:36,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 221. [2021-06-05 14:08:36,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.2409090909090907) internal successors, (493), 220 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:36,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 493 transitions. [2021-06-05 14:08:36,856 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 493 transitions. Word has length 21 [2021-06-05 14:08:36,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:36,856 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 493 transitions. [2021-06-05 14:08:36,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 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 14:08:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 493 transitions. [2021-06-05 14:08:36,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:36,857 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:36,857 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:37,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 14:08:37,073 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:37,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2128550594, now seen corresponding path program 18 times [2021-06-05 14:08:37,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:37,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7968042] [2021-06-05 14:08:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:37,108 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 14:08:37,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:37,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7968042] [2021-06-05 14:08:37,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7968042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:37,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287554734] [2021-06-05 14:08:37,108 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 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 14:08:37,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:08:37,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:37,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:37,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:37,247 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 14:08:37,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287554734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:37,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:37,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 14:08:37,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042195486] [2021-06-05 14:08:37,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:08:37,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:37,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:08:37,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:08:37,249 INFO L87 Difference]: Start difference. First operand 221 states and 493 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 14:08:37,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:37,600 INFO L93 Difference]: Finished difference Result 371 states and 719 transitions. [2021-06-05 14:08:37,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:37,600 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 14:08:37,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:37,602 INFO L225 Difference]: With dead ends: 371 [2021-06-05 14:08:37,602 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 14:08:37,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 14:08:37,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 218. [2021-06-05 14:08:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.225806451612903) internal successors, (483), 217 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 483 transitions. [2021-06-05 14:08:37,610 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 483 transitions. Word has length 21 [2021-06-05 14:08:37,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:37,610 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 483 transitions. [2021-06-05 14:08:37,610 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 14:08:37,610 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 483 transitions. [2021-06-05 14:08:37,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:37,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:37,611 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:37,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 14:08:37,837 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:37,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:37,837 INFO L82 PathProgramCache]: Analyzing trace with hash 744652512, now seen corresponding path program 19 times [2021-06-05 14:08:37,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:37,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557264634] [2021-06-05 14:08:37,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:37,873 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 14:08:37,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:37,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557264634] [2021-06-05 14:08:37,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557264634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:37,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496827499] [2021-06-05 14:08:37,873 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 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 14:08:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:37,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:37,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:37,987 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 14:08:37,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496827499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:37,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:37,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 14:08:37,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502679182] [2021-06-05 14:08:37,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:08:37,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:37,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:08:37,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:08:37,989 INFO L87 Difference]: Start difference. First operand 218 states and 483 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 14:08:38,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:38,119 INFO L93 Difference]: Finished difference Result 238 states and 514 transitions. [2021-06-05 14:08:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:08:38,119 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 14:08:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:38,120 INFO L225 Difference]: With dead ends: 238 [2021-06-05 14:08:38,120 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 14:08:38,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:08:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 14:08:38,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 218. [2021-06-05 14:08:38,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.2211981566820276) internal successors, (482), 217 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 14:08:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 482 transitions. [2021-06-05 14:08:38,127 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 482 transitions. Word has length 21 [2021-06-05 14:08:38,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:38,127 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 482 transitions. [2021-06-05 14:08:38,127 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 14:08:38,127 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 482 transitions. [2021-06-05 14:08:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:38,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:38,128 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:38,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 14:08:38,345 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:38,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:38,345 INFO L82 PathProgramCache]: Analyzing trace with hash -157465486, now seen corresponding path program 20 times [2021-06-05 14:08:38,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:38,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705270990] [2021-06-05 14:08:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:38,373 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 14:08:38,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:38,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705270990] [2021-06-05 14:08:38,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705270990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:38,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251156907] [2021-06-05 14:08:38,373 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 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 14:08:38,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:38,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:38,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:38,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:38,495 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 14:08:38,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251156907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:38,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:38,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:08:38,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294903651] [2021-06-05 14:08:38,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:08:38,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:38,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:08:38,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:08:38,496 INFO L87 Difference]: Start difference. First operand 218 states and 482 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:38,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:38,852 INFO L93 Difference]: Finished difference Result 631 states and 1240 transitions. [2021-06-05 14:08:38,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:08:38,853 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:08:38,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:38,855 INFO L225 Difference]: With dead ends: 631 [2021-06-05 14:08:38,855 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 14:08:38,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:08:38,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 14:08:38,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 263. [2021-06-05 14:08:38,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.267175572519084) internal successors, (594), 262 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 594 transitions. [2021-06-05 14:08:38,865 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 594 transitions. Word has length 21 [2021-06-05 14:08:38,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:38,865 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 594 transitions. [2021-06-05 14:08:38,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:38,865 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 594 transitions. [2021-06-05 14:08:38,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:38,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:38,866 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:39,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 14:08:39,089 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:39,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:39,090 INFO L82 PathProgramCache]: Analyzing trace with hash 545339822, now seen corresponding path program 21 times [2021-06-05 14:08:39,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:39,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964268036] [2021-06-05 14:08:39,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:39,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:39,120 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 14:08:39,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:39,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964268036] [2021-06-05 14:08:39,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964268036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:39,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889720555] [2021-06-05 14:08:39,121 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:39,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:08:39,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:39,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:39,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:39,268 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 14:08:39,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889720555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:39,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:39,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:08:39,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333917901] [2021-06-05 14:08:39,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:08:39,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:39,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:08:39,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:08:39,270 INFO L87 Difference]: Start difference. First operand 263 states and 594 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 14:08:39,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:39,584 INFO L93 Difference]: Finished difference Result 429 states and 858 transitions. [2021-06-05 14:08:39,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:08:39,584 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 14:08:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:39,590 INFO L225 Difference]: With dead ends: 429 [2021-06-05 14:08:39,590 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 14:08:39,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:08:39,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 14:08:39,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 263. [2021-06-05 14:08:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.263358778625954) internal successors, (593), 262 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 593 transitions. [2021-06-05 14:08:39,605 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 593 transitions. Word has length 21 [2021-06-05 14:08:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:39,606 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 593 transitions. [2021-06-05 14:08:39,606 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 14:08:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 593 transitions. [2021-06-05 14:08:39,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:39,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:39,607 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:39,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 14:08:39,823 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:39,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:39,824 INFO L82 PathProgramCache]: Analyzing trace with hash -719588038, now seen corresponding path program 22 times [2021-06-05 14:08:39,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:39,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895894881] [2021-06-05 14:08:39,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:39,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:39,852 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 14:08:39,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:39,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895894881] [2021-06-05 14:08:39,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895894881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:39,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453343542] [2021-06-05 14:08:39,853 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 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 14:08:39,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:39,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:39,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:39,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:40,008 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 14:08:40,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453343542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:40,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:40,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:08:40,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937041942] [2021-06-05 14:08:40,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:08:40,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:40,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:08:40,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:08:40,010 INFO L87 Difference]: Start difference. First operand 263 states and 593 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:40,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:40,409 INFO L93 Difference]: Finished difference Result 520 states and 1042 transitions. [2021-06-05 14:08:40,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:40,410 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:08:40,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:40,411 INFO L225 Difference]: With dead ends: 520 [2021-06-05 14:08:40,412 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 14:08:40,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 249.7ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:08:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 14:08:40,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 264. [2021-06-05 14:08:40,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.2623574144486693) internal successors, (595), 263 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 595 transitions. [2021-06-05 14:08:40,419 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 595 transitions. Word has length 21 [2021-06-05 14:08:40,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:40,419 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 595 transitions. [2021-06-05 14:08:40,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:40,419 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 595 transitions. [2021-06-05 14:08:40,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:40,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:40,420 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:40,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:40,620 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:40,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:40,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2103486120, now seen corresponding path program 23 times [2021-06-05 14:08:40,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:40,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525765842] [2021-06-05 14:08:40,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:40,652 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 14:08:40,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:40,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525765842] [2021-06-05 14:08:40,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525765842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:40,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241656633] [2021-06-05 14:08:40,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:40,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 14:08:40,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:40,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:40,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:40,773 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 14:08:40,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241656633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:40,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:40,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:08:40,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281275322] [2021-06-05 14:08:40,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:08:40,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:40,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:08:40,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:08:40,775 INFO L87 Difference]: Start difference. First operand 264 states and 595 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:41,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:41,051 INFO L93 Difference]: Finished difference Result 475 states and 944 transitions. [2021-06-05 14:08:41,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:08:41,051 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:08:41,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:41,053 INFO L225 Difference]: With dead ends: 475 [2021-06-05 14:08:41,053 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 14:08:41,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:08:41,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 14:08:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 266. [2021-06-05 14:08:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.2528301886792454) internal successors, (597), 265 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 597 transitions. [2021-06-05 14:08:41,060 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 597 transitions. Word has length 21 [2021-06-05 14:08:41,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:41,060 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 597 transitions. [2021-06-05 14:08:41,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:41,060 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 597 transitions. [2021-06-05 14:08:41,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:41,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:41,061 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:41,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 14:08:41,274 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:41,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:41,275 INFO L82 PathProgramCache]: Analyzing trace with hash 374503550, now seen corresponding path program 24 times [2021-06-05 14:08:41,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:41,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567602435] [2021-06-05 14:08:41,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:41,307 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 14:08:41,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:41,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567602435] [2021-06-05 14:08:41,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567602435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:41,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375469238] [2021-06-05 14:08:41,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:41,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:08:41,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:41,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:41,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:41,423 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 14:08:41,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375469238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:41,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:41,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:08:41,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72771171] [2021-06-05 14:08:41,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:08:41,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:41,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:08:41,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:08:41,424 INFO L87 Difference]: Start difference. First operand 266 states and 597 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:41,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:41,838 INFO L93 Difference]: Finished difference Result 451 states and 913 transitions. [2021-06-05 14:08:41,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:08:41,838 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:08:41,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:41,839 INFO L225 Difference]: With dead ends: 451 [2021-06-05 14:08:41,839 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 14:08:41,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 262.7ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:08:41,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 14:08:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 250. [2021-06-05 14:08:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.216867469879518) internal successors, (552), 249 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:41,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 552 transitions. [2021-06-05 14:08:41,846 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 552 transitions. Word has length 21 [2021-06-05 14:08:41,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:41,846 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 552 transitions. [2021-06-05 14:08:41,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 552 transitions. [2021-06-05 14:08:41,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:41,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:41,847 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:42,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:42,061 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:42,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1685134910, now seen corresponding path program 25 times [2021-06-05 14:08:42,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:42,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29388066] [2021-06-05 14:08:42,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:42,097 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 14:08:42,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:42,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29388066] [2021-06-05 14:08:42,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29388066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:42,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189223697] [2021-06-05 14:08:42,097 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 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 14:08:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:42,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:42,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:42,205 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 14:08:42,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189223697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:42,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:42,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:08:42,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493398558] [2021-06-05 14:08:42,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:08:42,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:42,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:08:42,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:08:42,207 INFO L87 Difference]: Start difference. First operand 250 states and 552 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:42,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:42,529 INFO L93 Difference]: Finished difference Result 408 states and 804 transitions. [2021-06-05 14:08:42,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:08:42,530 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:08:42,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:42,531 INFO L225 Difference]: With dead ends: 408 [2021-06-05 14:08:42,531 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 14:08:42,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:08:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 14:08:42,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 254. [2021-06-05 14:08:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.205533596837945) internal successors, (558), 253 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:42,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 558 transitions. [2021-06-05 14:08:42,538 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 558 transitions. Word has length 21 [2021-06-05 14:08:42,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:42,539 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 558 transitions. [2021-06-05 14:08:42,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:42,539 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 558 transitions. [2021-06-05 14:08:42,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:42,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:42,539 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:42,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 14:08:42,764 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:42,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:42,764 INFO L82 PathProgramCache]: Analyzing trace with hash 19311986, now seen corresponding path program 26 times [2021-06-05 14:08:42,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:42,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357752689] [2021-06-05 14:08:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:42,800 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 14:08:42,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:42,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357752689] [2021-06-05 14:08:42,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357752689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:42,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456511072] [2021-06-05 14:08:42,801 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 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 14:08:42,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:42,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:42,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:42,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:42,922 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 14:08:42,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456511072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:42,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:42,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:08:42,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029403361] [2021-06-05 14:08:42,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:08:42,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:42,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:08:42,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:08:42,924 INFO L87 Difference]: Start difference. First operand 254 states and 558 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:43,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:43,306 INFO L93 Difference]: Finished difference Result 462 states and 931 transitions. [2021-06-05 14:08:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:08:43,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:08:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:43,308 INFO L225 Difference]: With dead ends: 462 [2021-06-05 14:08:43,308 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 14:08:43,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 263.9ms TimeCoverageRelationStatistics Valid=221, Invalid=835, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:08:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 14:08:43,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 243. [2021-06-05 14:08:43,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.1735537190082646) internal successors, (526), 242 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:43,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 526 transitions. [2021-06-05 14:08:43,314 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 526 transitions. Word has length 21 [2021-06-05 14:08:43,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:43,314 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 526 transitions. [2021-06-05 14:08:43,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:43,315 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 526 transitions. [2021-06-05 14:08:43,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:43,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:43,315 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:43,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:43,539 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:43,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:43,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1105347502, now seen corresponding path program 27 times [2021-06-05 14:08:43,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:43,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146539300] [2021-06-05 14:08:43,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:43,572 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 14:08:43,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:43,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146539300] [2021-06-05 14:08:43,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146539300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:43,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125758015] [2021-06-05 14:08:43,573 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 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 14:08:43,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:08:43,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:43,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:43,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:43,683 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 14:08:43,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125758015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:43,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:43,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:08:43,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662204789] [2021-06-05 14:08:43,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:08:43,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:43,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:08:43,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:08:43,685 INFO L87 Difference]: Start difference. First operand 243 states and 526 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 14:08:43,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:43,937 INFO L93 Difference]: Finished difference Result 331 states and 646 transitions. [2021-06-05 14:08:43,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:08:43,938 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:08:43,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:43,939 INFO L225 Difference]: With dead ends: 331 [2021-06-05 14:08:43,939 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 14:08:43,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:08:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 14:08:43,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 228. [2021-06-05 14:08:43,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.185022026431718) internal successors, (496), 227 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 496 transitions. [2021-06-05 14:08:43,944 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 496 transitions. Word has length 21 [2021-06-05 14:08:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:43,944 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 496 transitions. [2021-06-05 14:08:43,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 14:08:43,944 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 496 transitions. [2021-06-05 14:08:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:43,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:43,945 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:44,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 14:08:44,170 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:44,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:44,170 INFO L82 PathProgramCache]: Analyzing trace with hash -701741454, now seen corresponding path program 28 times [2021-06-05 14:08:44,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:44,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554569362] [2021-06-05 14:08:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:44,200 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 14:08:44,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:44,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554569362] [2021-06-05 14:08:44,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554569362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:44,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142715384] [2021-06-05 14:08:44,201 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 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 14:08:44,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:44,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:44,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:44,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:44,310 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 14:08:44,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142715384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:44,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:44,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 14:08:44,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387340840] [2021-06-05 14:08:44,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:08:44,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:44,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:08:44,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:08:44,312 INFO L87 Difference]: Start difference. First operand 228 states and 496 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:08:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:44,612 INFO L93 Difference]: Finished difference Result 389 states and 758 transitions. [2021-06-05 14:08:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:08:44,613 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:08:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:44,618 INFO L225 Difference]: With dead ends: 389 [2021-06-05 14:08:44,618 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 14:08:44,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 226.6ms TimeCoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:08:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 14:08:44,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 228. [2021-06-05 14:08:44,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.1806167400881056) internal successors, (495), 227 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:44,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 495 transitions. [2021-06-05 14:08:44,625 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 495 transitions. Word has length 21 [2021-06-05 14:08:44,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:44,625 INFO L482 AbstractCegarLoop]: Abstraction has 228 states and 495 transitions. [2021-06-05 14:08:44,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:08:44,625 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 495 transitions. [2021-06-05 14:08:44,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:44,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:44,626 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:44,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:44,848 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:44,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:44,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1063854, now seen corresponding path program 29 times [2021-06-05 14:08:44,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:44,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794232575] [2021-06-05 14:08:44,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:44,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:44,876 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 14:08:44,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:44,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794232575] [2021-06-05 14:08:44,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794232575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:44,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943924774] [2021-06-05 14:08:44,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:44,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:08:44,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:44,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:44,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:44,986 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 14:08:44,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943924774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:44,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:44,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 14:08:44,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250791907] [2021-06-05 14:08:44,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:08:44,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:44,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:08:44,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:08:44,988 INFO L87 Difference]: Start difference. First operand 228 states and 495 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 14:08:45,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:45,178 INFO L93 Difference]: Finished difference Result 278 states and 563 transitions. [2021-06-05 14:08:45,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:08:45,178 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 14:08:45,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:45,179 INFO L225 Difference]: With dead ends: 278 [2021-06-05 14:08:45,179 INFO L226 Difference]: Without dead ends: 275 [2021-06-05 14:08:45,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:08:45,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-05 14:08:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 225. [2021-06-05 14:08:45,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.1830357142857144) internal successors, (489), 224 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 489 transitions. [2021-06-05 14:08:45,184 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 489 transitions. Word has length 21 [2021-06-05 14:08:45,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:45,184 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 489 transitions. [2021-06-05 14:08:45,184 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 14:08:45,184 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 489 transitions. [2021-06-05 14:08:45,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:45,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:45,185 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:45,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 14:08:45,389 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:45,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:45,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1263864006, now seen corresponding path program 30 times [2021-06-05 14:08:45,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:45,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117080852] [2021-06-05 14:08:45,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:45,443 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 14:08:45,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:45,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117080852] [2021-06-05 14:08:45,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117080852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:45,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963744237] [2021-06-05 14:08:45,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:08:45,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:08:45,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:45,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:45,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:45,544 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 14:08:45,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963744237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:45,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:45,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 14:08:45,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899628383] [2021-06-05 14:08:45,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:08:45,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:45,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:08:45,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:08:45,547 INFO L87 Difference]: Start difference. First operand 225 states and 489 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:45,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:45,840 INFO L93 Difference]: Finished difference Result 315 states and 641 transitions. [2021-06-05 14:08:45,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:08:45,841 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:08:45,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:45,842 INFO L225 Difference]: With dead ends: 315 [2021-06-05 14:08:45,842 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 14:08:45,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 181.2ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:08:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 14:08:45,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 226. [2021-06-05 14:08:45,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.1822222222222223) internal successors, (491), 225 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:45,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 491 transitions. [2021-06-05 14:08:45,848 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 491 transitions. Word has length 21 [2021-06-05 14:08:45,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:45,848 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 491 transitions. [2021-06-05 14:08:45,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:45,848 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 491 transitions. [2021-06-05 14:08:45,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:45,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:45,849 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:46,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:46,065 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:46,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:46,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1647205208, now seen corresponding path program 31 times [2021-06-05 14:08:46,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:46,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677178571] [2021-06-05 14:08:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:46,097 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 14:08:46,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:46,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677178571] [2021-06-05 14:08:46,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677178571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:46,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681556135] [2021-06-05 14:08:46,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:46,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:46,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:46,207 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 14:08:46,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681556135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:46,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:46,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-05 14:08:46,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858023334] [2021-06-05 14:08:46,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:08:46,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:46,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:08:46,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:08:46,209 INFO L87 Difference]: Start difference. First operand 226 states and 491 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:46,441 INFO L93 Difference]: Finished difference Result 367 states and 714 transitions. [2021-06-05 14:08:46,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:08:46,441 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:08:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:46,442 INFO L225 Difference]: With dead ends: 367 [2021-06-05 14:08:46,442 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 14:08:46,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:08:46,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 14:08:46,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 226. [2021-06-05 14:08:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.1777777777777776) internal successors, (490), 225 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:46,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 490 transitions. [2021-06-05 14:08:46,447 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 490 transitions. Word has length 21 [2021-06-05 14:08:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:46,448 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 490 transitions. [2021-06-05 14:08:46,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 490 transitions. [2021-06-05 14:08:46,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:46,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:46,448 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:46,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 14:08:46,674 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:46,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:46,674 INFO L82 PathProgramCache]: Analyzing trace with hash -169772418, now seen corresponding path program 32 times [2021-06-05 14:08:46,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:46,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231584936] [2021-06-05 14:08:46,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:46,704 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 14:08:46,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:46,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231584936] [2021-06-05 14:08:46,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231584936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:46,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924627288] [2021-06-05 14:08:46,705 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 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 14:08:46,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:46,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:46,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:46,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:46,813 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 14:08:46,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924627288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:46,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:46,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:08:46,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904468246] [2021-06-05 14:08:46,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:08:46,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:46,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:08:46,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:08:46,815 INFO L87 Difference]: Start difference. First operand 226 states and 490 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:47,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:47,541 INFO L93 Difference]: Finished difference Result 472 states and 966 transitions. [2021-06-05 14:08:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 14:08:47,541 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:08:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:47,543 INFO L225 Difference]: With dead ends: 472 [2021-06-05 14:08:47,543 INFO L226 Difference]: Without dead ends: 472 [2021-06-05 14:08:47,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 505.3ms TimeCoverageRelationStatistics Valid=565, Invalid=2191, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 14:08:47,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-06-05 14:08:47,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 230. [2021-06-05 14:08:47,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1746724890829694) internal successors, (498), 229 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 498 transitions. [2021-06-05 14:08:47,549 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 498 transitions. Word has length 21 [2021-06-05 14:08:47,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:47,549 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 498 transitions. [2021-06-05 14:08:47,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:47,549 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 498 transitions. [2021-06-05 14:08:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:47,549 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:47,550 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:47,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 14:08:47,774 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:47,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1140858942, now seen corresponding path program 33 times [2021-06-05 14:08:47,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:47,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798611455] [2021-06-05 14:08:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:47,813 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 14:08:47,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:47,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798611455] [2021-06-05 14:08:47,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798611455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:47,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824521770] [2021-06-05 14:08:47,813 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 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 14:08:47,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:08:47,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:47,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:47,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:47,914 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 14:08:47,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824521770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:47,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:47,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 14:08:47,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426545480] [2021-06-05 14:08:47,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:08:47,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:47,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:08:47,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:08:47,916 INFO L87 Difference]: Start difference. First operand 230 states and 498 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:48,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:48,230 INFO L93 Difference]: Finished difference Result 418 states and 797 transitions. [2021-06-05 14:08:48,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:08:48,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 14:08:48,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:48,231 INFO L225 Difference]: With dead ends: 418 [2021-06-05 14:08:48,231 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 14:08:48,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 245.0ms TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:08:48,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 14:08:48,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 230. [2021-06-05 14:08:48,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.1572052401746724) internal successors, (494), 229 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 14:08:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 494 transitions. [2021-06-05 14:08:48,237 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 494 transitions. Word has length 21 [2021-06-05 14:08:48,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:48,237 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 494 transitions. [2021-06-05 14:08:48,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 494 transitions. [2021-06-05 14:08:48,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:48,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:48,238 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:48,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 14:08:48,461 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:48,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1900542150, now seen corresponding path program 34 times [2021-06-05 14:08:48,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:48,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635386053] [2021-06-05 14:08:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:48,548 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 14:08:48,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:48,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635386053] [2021-06-05 14:08:48,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635386053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:48,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17887656] [2021-06-05 14:08:48,549 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 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 14:08:48,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:48,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:48,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:48,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:48,662 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 14:08:48,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17887656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:48,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:48,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:08:48,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789629035] [2021-06-05 14:08:48,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:08:48,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:48,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:08:48,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:08:48,664 INFO L87 Difference]: Start difference. First operand 230 states and 494 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 14:08:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:49,372 INFO L93 Difference]: Finished difference Result 394 states and 828 transitions. [2021-06-05 14:08:49,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 14:08:49,372 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 14:08:49,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:49,373 INFO L225 Difference]: With dead ends: 394 [2021-06-05 14:08:49,373 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 14:08:49,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 563.6ms TimeCoverageRelationStatistics Valid=406, Invalid=1400, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:08:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 14:08:49,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 227. [2021-06-05 14:08:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1548672566371683) internal successors, (487), 226 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 487 transitions. [2021-06-05 14:08:49,379 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 487 transitions. Word has length 21 [2021-06-05 14:08:49,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:49,379 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 487 transitions. [2021-06-05 14:08:49,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 14:08:49,379 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 487 transitions. [2021-06-05 14:08:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 14:08:49,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:49,380 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:49,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 14:08:49,593 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:49,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:49,593 INFO L82 PathProgramCache]: Analyzing trace with hash 913637562, now seen corresponding path program 35 times [2021-06-05 14:08:49,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:49,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892371633] [2021-06-05 14:08:49,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:49,626 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 14:08:49,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:49,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892371633] [2021-06-05 14:08:49,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892371633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:49,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738321658] [2021-06-05 14:08:49,627 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 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 14:08:49,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:08:49,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:49,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 14:08:49,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:49,739 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 14:08:49,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738321658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:49,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:49,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:08:49,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189593993] [2021-06-05 14:08:49,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:08:49,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:49,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:08:49,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:08:49,740 INFO L87 Difference]: Start difference. First operand 227 states and 487 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 14:08:50,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:50,101 INFO L93 Difference]: Finished difference Result 340 states and 660 transitions. [2021-06-05 14:08:50,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:08:50,102 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 14:08:50,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:50,103 INFO L225 Difference]: With dead ends: 340 [2021-06-05 14:08:50,103 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 14:08:50,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 287.5ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:08:50,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 14:08:50,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 227. [2021-06-05 14:08:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.1371681415929205) internal successors, (483), 226 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:50,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 483 transitions. [2021-06-05 14:08:50,108 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 483 transitions. Word has length 21 [2021-06-05 14:08:50,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:50,108 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 483 transitions. [2021-06-05 14:08:50,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 14:08:50,108 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 483 transitions. [2021-06-05 14:08:50,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:08:50,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:50,109 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:50,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 14:08:50,325 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:50,325 INFO L82 PathProgramCache]: Analyzing trace with hash -459784912, now seen corresponding path program 36 times [2021-06-05 14:08:50,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:50,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473684484] [2021-06-05 14:08:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:50,362 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 14:08:50,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:50,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473684484] [2021-06-05 14:08:50,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473684484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:50,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321528841] [2021-06-05 14:08:50,362 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 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 14:08:50,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:08:50,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:50,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:50,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:50,479 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 14:08:50,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321528841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:50,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:50,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-06-05 14:08:50,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416832553] [2021-06-05 14:08:50,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:08:50,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:50,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:08:50,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:08:50,480 INFO L87 Difference]: Start difference. First operand 227 states and 483 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:50,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:50,608 INFO L93 Difference]: Finished difference Result 364 states and 746 transitions. [2021-06-05 14:08:50,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:08:50,609 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:08:50,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:50,610 INFO L225 Difference]: With dead ends: 364 [2021-06-05 14:08:50,610 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 14:08:50,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:08:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 14:08:50,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 296. [2021-06-05 14:08:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.1796610169491526) internal successors, (643), 295 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 643 transitions. [2021-06-05 14:08:50,615 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 643 transitions. Word has length 23 [2021-06-05 14:08:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:50,615 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 643 transitions. [2021-06-05 14:08:50,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 643 transitions. [2021-06-05 14:08:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:08:50,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:50,616 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:50,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 14:08:50,829 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:50,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1734689328, now seen corresponding path program 37 times [2021-06-05 14:08:50,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:50,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834700218] [2021-06-05 14:08:50,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:08:50,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:50,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834700218] [2021-06-05 14:08:50,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834700218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:50,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18523377] [2021-06-05 14:08:50,885 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 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 14:08:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:50,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:50,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:51,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18523377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:51,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:51,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 9 [2021-06-05 14:08:51,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927492631] [2021-06-05 14:08:51,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:08:51,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:51,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:08:51,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:08:51,039 INFO L87 Difference]: Start difference. First operand 296 states and 643 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:08:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:51,192 INFO L93 Difference]: Finished difference Result 431 states and 902 transitions. [2021-06-05 14:08:51,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:08:51,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:08:51,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:51,194 INFO L225 Difference]: With dead ends: 431 [2021-06-05 14:08:51,194 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 14:08:51,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:08:51,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 14:08:51,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 324. [2021-06-05 14:08:51,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.2321981424148607) internal successors, (721), 323 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:51,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 721 transitions. [2021-06-05 14:08:51,200 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 721 transitions. Word has length 23 [2021-06-05 14:08:51,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:51,200 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 721 transitions. [2021-06-05 14:08:51,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 14:08:51,200 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 721 transitions. [2021-06-05 14:08:51,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:08:51,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:51,201 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:51,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 14:08:51,421 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:51,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:51,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1856120112, now seen corresponding path program 38 times [2021-06-05 14:08:51,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:51,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103937401] [2021-06-05 14:08:51,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:08:51,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:51,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103937401] [2021-06-05 14:08:51,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103937401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:51,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74969721] [2021-06-05 14:08:51,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:08:51,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:51,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:51,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:51,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:51,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74969721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:51,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:51,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 10 [2021-06-05 14:08:51,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958452283] [2021-06-05 14:08:51,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:08:51,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:51,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:08:51,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:08:51,742 INFO L87 Difference]: Start difference. First operand 324 states and 721 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:51,967 INFO L93 Difference]: Finished difference Result 495 states and 1049 transitions. [2021-06-05 14:08:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:08:51,968 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:08:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:51,970 INFO L225 Difference]: With dead ends: 495 [2021-06-05 14:08:51,970 INFO L226 Difference]: Without dead ends: 481 [2021-06-05 14:08:51,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:08:51,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-05 14:08:51,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 356. [2021-06-05 14:08:51,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 2.267605633802817) internal successors, (805), 355 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 805 transitions. [2021-06-05 14:08:51,977 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 805 transitions. Word has length 23 [2021-06-05 14:08:51,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:51,977 INFO L482 AbstractCegarLoop]: Abstraction has 356 states and 805 transitions. [2021-06-05 14:08:51,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:51,977 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 805 transitions. [2021-06-05 14:08:51,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 14:08:51,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:51,978 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:52,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:52,185 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:52,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:52,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1707980752, now seen corresponding path program 39 times [2021-06-05 14:08:52,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:52,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120396975] [2021-06-05 14:08:52,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 14:08:52,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:52,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120396975] [2021-06-05 14:08:52,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120396975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:52,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458951085] [2021-06-05 14:08:52,223 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 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 14:08:52,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:08:52,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:52,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 14:08:52,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:52,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:52,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458951085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:52,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:52,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8] total 8 [2021-06-05 14:08:52,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052973548] [2021-06-05 14:08:52,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:08:52,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:52,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:08:52,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:08:52,392 INFO L87 Difference]: Start difference. First operand 356 states and 805 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:52,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:52,528 INFO L93 Difference]: Finished difference Result 482 states and 1047 transitions. [2021-06-05 14:08:52,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:08:52,529 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 14:08:52,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:52,530 INFO L225 Difference]: With dead ends: 482 [2021-06-05 14:08:52,530 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 14:08:52,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:08:52,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 14:08:52,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 404. [2021-06-05 14:08:52,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2853598014888337) internal successors, (921), 403 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:52,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 921 transitions. [2021-06-05 14:08:52,537 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 921 transitions. Word has length 23 [2021-06-05 14:08:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:52,537 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 921 transitions. [2021-06-05 14:08:52,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:52,537 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 921 transitions. [2021-06-05 14:08:52,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:08:52,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:52,538 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:52,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:52,757 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:52,757 INFO L82 PathProgramCache]: Analyzing trace with hash 942134834, now seen corresponding path program 40 times [2021-06-05 14:08:52,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:52,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298218489] [2021-06-05 14:08:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:52,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:52,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298218489] [2021-06-05 14:08:52,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298218489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:52,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330920324] [2021-06-05 14:08:52,822 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:52,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:52,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:52,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:08:52,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:52,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330920324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:52,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:52,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:08:52,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978407633] [2021-06-05 14:08:52,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:08:52,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:52,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:08:52,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:08:52,957 INFO L87 Difference]: Start difference. First operand 404 states and 921 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 14:08:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:54,644 INFO L93 Difference]: Finished difference Result 869 states and 1808 transitions. [2021-06-05 14:08:54,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 14:08:54,644 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 25 [2021-06-05 14:08:54,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:54,646 INFO L225 Difference]: With dead ends: 869 [2021-06-05 14:08:54,646 INFO L226 Difference]: Without dead ends: 869 [2021-06-05 14:08:54,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 1240.8ms TimeCoverageRelationStatistics Valid=1023, Invalid=4233, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 14:08:54,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-06-05 14:08:54,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 330. [2021-06-05 14:08:54,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.2674772036474162) internal successors, (746), 329 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:54,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 746 transitions. [2021-06-05 14:08:54,656 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 746 transitions. Word has length 25 [2021-06-05 14:08:54,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:54,656 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 746 transitions. [2021-06-05 14:08:54,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 14:08:54,656 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 746 transitions. [2021-06-05 14:08:54,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:08:54,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:54,657 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:54,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:54,873 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:54,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:54,873 INFO L82 PathProgramCache]: Analyzing trace with hash -394924434, now seen corresponding path program 41 times [2021-06-05 14:08:54,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:54,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565072315] [2021-06-05 14:08:54,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:54,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:54,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565072315] [2021-06-05 14:08:54,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565072315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:54,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181422650] [2021-06-05 14:08:54,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:08:54,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:08:54,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:54,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:08:54,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:55,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181422650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:55,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:55,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:08:55,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856283194] [2021-06-05 14:08:55,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:08:55,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:55,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:08:55,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:08:55,040 INFO L87 Difference]: Start difference. First operand 330 states and 746 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 14:08:55,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:55,803 INFO L93 Difference]: Finished difference Result 766 states and 1462 transitions. [2021-06-05 14:08:55,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 14:08:55,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 25 [2021-06-05 14:08:55,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:55,805 INFO L225 Difference]: With dead ends: 766 [2021-06-05 14:08:55,806 INFO L226 Difference]: Without dead ends: 710 [2021-06-05 14:08:55,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 605.0ms TimeCoverageRelationStatistics Valid=540, Invalid=2430, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 14:08:55,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-06-05 14:08:55,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 406. [2021-06-05 14:08:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.246913580246914) internal successors, (910), 405 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 910 transitions. [2021-06-05 14:08:55,813 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 910 transitions. Word has length 25 [2021-06-05 14:08:55,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:55,813 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 910 transitions. [2021-06-05 14:08:55,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 14:08:55,813 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 910 transitions. [2021-06-05 14:08:55,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:08:55,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:55,814 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:56,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 14:08:56,029 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:56,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:56,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1298777542, now seen corresponding path program 42 times [2021-06-05 14:08:56,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:56,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129478116] [2021-06-05 14:08:56,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:56,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:56,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129478116] [2021-06-05 14:08:56,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129478116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:56,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534169823] [2021-06-05 14:08:56,079 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 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 14:08:56,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:08:56,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:56,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:08:56,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:56,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534169823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:56,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:56,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-05 14:08:56,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046622143] [2021-06-05 14:08:56,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:08:56,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:56,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:08:56,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:08:56,213 INFO L87 Difference]: Start difference. First operand 406 states and 910 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:56,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:56,770 INFO L93 Difference]: Finished difference Result 728 states and 1423 transitions. [2021-06-05 14:08:56,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 14:08:56,770 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:08:56,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:56,772 INFO L225 Difference]: With dead ends: 728 [2021-06-05 14:08:56,772 INFO L226 Difference]: Without dead ends: 728 [2021-06-05 14:08:56,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 411.0ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:08:56,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-05 14:08:56,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 402. [2021-06-05 14:08:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.2369077306733165) internal successors, (897), 401 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:56,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 897 transitions. [2021-06-05 14:08:56,778 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 897 transitions. Word has length 25 [2021-06-05 14:08:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:56,778 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 897 transitions. [2021-06-05 14:08:56,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 897 transitions. [2021-06-05 14:08:56,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:08:56,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:56,779 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:56,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:56,980 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:56,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:56,980 INFO L82 PathProgramCache]: Analyzing trace with hash -85120540, now seen corresponding path program 43 times [2021-06-05 14:08:56,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:56,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686580373] [2021-06-05 14:08:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:57,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:57,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686580373] [2021-06-05 14:08:57,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686580373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:57,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003914669] [2021-06-05 14:08:57,024 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 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 14:08:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:57,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:08:57,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:57,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003914669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:57,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:57,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-05 14:08:57,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913453173] [2021-06-05 14:08:57,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:08:57,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:57,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:08:57,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:08:57,153 INFO L87 Difference]: Start difference. First operand 402 states and 897 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:57,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:57,319 INFO L93 Difference]: Finished difference Result 437 states and 953 transitions. [2021-06-05 14:08:57,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:08:57,320 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:08:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:57,322 INFO L225 Difference]: With dead ends: 437 [2021-06-05 14:08:57,322 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 14:08:57,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:08:57,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 14:08:57,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 402. [2021-06-05 14:08:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.2344139650872816) internal successors, (896), 401 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 896 transitions. [2021-06-05 14:08:57,328 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 896 transitions. Word has length 25 [2021-06-05 14:08:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:57,328 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 896 transitions. [2021-06-05 14:08:57,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:57,328 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 896 transitions. [2021-06-05 14:08:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:08:57,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:57,329 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:57,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:57,530 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:57,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:57,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1036927438, now seen corresponding path program 44 times [2021-06-05 14:08:57,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:57,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709771482] [2021-06-05 14:08:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:57,565 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:57,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:57,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709771482] [2021-06-05 14:08:57,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709771482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:57,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528044878] [2021-06-05 14:08:57,565 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 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 14:08:57,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:08:57,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:57,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:08:57,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:57,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528044878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:57,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:57,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-05 14:08:57,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765524669] [2021-06-05 14:08:57,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:08:57,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:57,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:08:57,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:08:57,711 INFO L87 Difference]: Start difference. First operand 402 states and 896 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:58,466 INFO L93 Difference]: Finished difference Result 1175 states and 2298 transitions. [2021-06-05 14:08:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 14:08:58,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:08:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:58,469 INFO L225 Difference]: With dead ends: 1175 [2021-06-05 14:08:58,469 INFO L226 Difference]: Without dead ends: 1175 [2021-06-05 14:08:58,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=501, Invalid=2469, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 14:08:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-06-05 14:08:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 477. [2021-06-05 14:08:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.2668067226890756) internal successors, (1079), 476 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1079 transitions. [2021-06-05 14:08:58,477 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1079 transitions. Word has length 25 [2021-06-05 14:08:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:58,477 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1079 transitions. [2021-06-05 14:08:58,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1079 transitions. [2021-06-05 14:08:58,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:08:58,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:58,481 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:58,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 14:08:58,682 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:58,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:58,682 INFO L82 PathProgramCache]: Analyzing trace with hash -334122130, now seen corresponding path program 45 times [2021-06-05 14:08:58,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:58,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959250851] [2021-06-05 14:08:58,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:08:58,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:58,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959250851] [2021-06-05 14:08:58,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959250851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:58,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868254287] [2021-06-05 14:08:58,717 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 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 14:08:58,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:08:58,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:58,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:08:58,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:58,842 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 14:08:58,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868254287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:58,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:58,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-05 14:08:58,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874299786] [2021-06-05 14:08:58,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:08:58,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:58,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:08:58,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:08:58,844 INFO L87 Difference]: Start difference. First operand 477 states and 1079 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 14:08:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:08:59,387 INFO L93 Difference]: Finished difference Result 822 states and 1640 transitions. [2021-06-05 14:08:59,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 14:08:59,388 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 14:08:59,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:08:59,390 INFO L225 Difference]: With dead ends: 822 [2021-06-05 14:08:59,390 INFO L226 Difference]: Without dead ends: 816 [2021-06-05 14:08:59,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 363.9ms TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:08:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-06-05 14:08:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 477. [2021-06-05 14:08:59,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.264705882352941) internal successors, (1078), 476 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:08:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 1078 transitions. [2021-06-05 14:08:59,397 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 1078 transitions. Word has length 25 [2021-06-05 14:08:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:08:59,398 INFO L482 AbstractCegarLoop]: Abstraction has 477 states and 1078 transitions. [2021-06-05 14:08:59,398 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 14:08:59,398 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 1078 transitions. [2021-06-05 14:08:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:08:59,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:08:59,398 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:08:59,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 14:08:59,599 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:08:59,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:08:59,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1599049990, now seen corresponding path program 46 times [2021-06-05 14:08:59,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:08:59,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023283449] [2021-06-05 14:08:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:08:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:08:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:08:59,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:08:59,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023283449] [2021-06-05 14:08:59,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023283449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:59,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895737739] [2021-06-05 14:08:59,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:08:59,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:08:59,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:08:59,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:08:59,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:08:59,787 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 14:08:59,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895737739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:08:59,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:08:59,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-05 14:08:59,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310124574] [2021-06-05 14:08:59,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:08:59,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:08:59,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:08:59,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:08:59,788 INFO L87 Difference]: Start difference. First operand 477 states and 1078 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:00,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:00,472 INFO L93 Difference]: Finished difference Result 994 states and 1984 transitions. [2021-06-05 14:09:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 14:09:00,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:00,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:00,475 INFO L225 Difference]: With dead ends: 994 [2021-06-05 14:09:00,475 INFO L226 Difference]: Without dead ends: 994 [2021-06-05 14:09:00,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 468.9ms TimeCoverageRelationStatistics Valid=398, Invalid=1954, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:09:00,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2021-06-05 14:09:00,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 478. [2021-06-05 14:09:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 2.2641509433962264) internal successors, (1080), 477 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:00,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1080 transitions. [2021-06-05 14:09:00,484 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1080 transitions. Word has length 25 [2021-06-05 14:09:00,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:00,484 INFO L482 AbstractCegarLoop]: Abstraction has 478 states and 1080 transitions. [2021-06-05 14:09:00,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:00,484 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1080 transitions. [2021-06-05 14:09:00,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:00,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:00,485 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:00,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 14:09:00,689 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:00,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1312019224, now seen corresponding path program 47 times [2021-06-05 14:09:00,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:00,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420143601] [2021-06-05 14:09:00,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:00,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:00,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420143601] [2021-06-05 14:09:00,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420143601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:00,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83081473] [2021-06-05 14:09:00,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:00,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:09:00,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:00,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:00,891 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 14:09:00,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83081473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:00,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:00,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-05 14:09:00,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084492870] [2021-06-05 14:09:00,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:09:00,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:00,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:09:00,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:09:00,892 INFO L87 Difference]: Start difference. First operand 478 states and 1080 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:01,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:01,428 INFO L93 Difference]: Finished difference Result 891 states and 1769 transitions. [2021-06-05 14:09:01,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 14:09:01,429 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:01,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:01,431 INFO L225 Difference]: With dead ends: 891 [2021-06-05 14:09:01,431 INFO L226 Difference]: Without dead ends: 887 [2021-06-05 14:09:01,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 344.0ms TimeCoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:09:01,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2021-06-05 14:09:01,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 480. [2021-06-05 14:09:01,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 479 states have (on average 2.258872651356994) internal successors, (1082), 479 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:01,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 1082 transitions. [2021-06-05 14:09:01,438 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 1082 transitions. Word has length 25 [2021-06-05 14:09:01,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:01,439 INFO L482 AbstractCegarLoop]: Abstraction has 480 states and 1082 transitions. [2021-06-05 14:09:01,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:01,439 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 1082 transitions. [2021-06-05 14:09:01,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:01,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:01,440 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:01,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:01,646 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:01,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:01,646 INFO L82 PathProgramCache]: Analyzing trace with hash -504958402, now seen corresponding path program 48 times [2021-06-05 14:09:01,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:01,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762806027] [2021-06-05 14:09:01,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:01,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:01,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762806027] [2021-06-05 14:09:01,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762806027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:01,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69977330] [2021-06-05 14:09:01,686 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:01,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:09:01,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:01,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:01,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:01,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69977330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:01,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:01,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:09:01,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946788600] [2021-06-05 14:09:01,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:01,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:01,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:01,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:01,850 INFO L87 Difference]: Start difference. First operand 480 states and 1082 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 14:09:02,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:02,720 INFO L93 Difference]: Finished difference Result 903 states and 1798 transitions. [2021-06-05 14:09:02,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 14:09:02,725 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 14:09:02,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:02,728 INFO L225 Difference]: With dead ends: 903 [2021-06-05 14:09:02,728 INFO L226 Difference]: Without dead ends: 903 [2021-06-05 14:09:02,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 622.3ms TimeCoverageRelationStatistics Valid=513, Invalid=2679, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 14:09:02,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2021-06-05 14:09:02,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 464. [2021-06-05 14:09:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.239740820734341) internal successors, (1037), 463 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:02,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1037 transitions. [2021-06-05 14:09:02,735 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1037 transitions. Word has length 25 [2021-06-05 14:09:02,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:02,735 INFO L482 AbstractCegarLoop]: Abstraction has 464 states and 1037 transitions. [2021-06-05 14:09:02,735 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 14:09:02,735 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1037 transitions. [2021-06-05 14:09:02,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:02,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:02,736 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:02,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:02,959 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:02,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:02,959 INFO L82 PathProgramCache]: Analyzing trace with hash 805672958, now seen corresponding path program 49 times [2021-06-05 14:09:02,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:02,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814653075] [2021-06-05 14:09:02,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:02,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:02,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814653075] [2021-06-05 14:09:02,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814653075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:02,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537698598] [2021-06-05 14:09:02,999 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 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 14:09:03,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:03,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:03,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:03,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537698598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:03,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:03,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:09:03,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524257957] [2021-06-05 14:09:03,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:03,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:03,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:03,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:03,157 INFO L87 Difference]: Start difference. First operand 464 states and 1037 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 14:09:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:03,817 INFO L93 Difference]: Finished difference Result 827 states and 1634 transitions. [2021-06-05 14:09:03,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 14:09:03,817 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 14:09:03,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:03,820 INFO L225 Difference]: With dead ends: 827 [2021-06-05 14:09:03,820 INFO L226 Difference]: Without dead ends: 821 [2021-06-05 14:09:03,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 436.2ms TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 14:09:03,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-06-05 14:09:03,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 468. [2021-06-05 14:09:03,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.233404710920771) internal successors, (1043), 467 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1043 transitions. [2021-06-05 14:09:03,829 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1043 transitions. Word has length 25 [2021-06-05 14:09:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:03,829 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1043 transitions. [2021-06-05 14:09:03,829 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 14:09:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1043 transitions. [2021-06-05 14:09:03,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:03,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:03,830 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:04,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 14:09:04,041 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:04,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:04,042 INFO L82 PathProgramCache]: Analyzing trace with hash -306061006, now seen corresponding path program 50 times [2021-06-05 14:09:04,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:04,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306223861] [2021-06-05 14:09:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:04,072 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:04,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:04,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306223861] [2021-06-05 14:09:04,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306223861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:04,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178092685] [2021-06-05 14:09:04,073 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 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 14:09:04,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:04,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:04,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:04,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:04,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178092685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:04,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:04,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 14:09:04,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869358326] [2021-06-05 14:09:04,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:04,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:04,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:04,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:04,230 INFO L87 Difference]: Start difference. First operand 468 states and 1043 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:04,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:04,897 INFO L93 Difference]: Finished difference Result 1176 states and 2324 transitions. [2021-06-05 14:09:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 14:09:04,898 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:04,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:04,900 INFO L225 Difference]: With dead ends: 1176 [2021-06-05 14:09:04,900 INFO L226 Difference]: Without dead ends: 1176 [2021-06-05 14:09:04,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 464.1ms TimeCoverageRelationStatistics Valid=423, Invalid=1833, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 14:09:04,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2021-06-05 14:09:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 469. [2021-06-05 14:09:04,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.232905982905983) internal successors, (1045), 468 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:04,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1045 transitions. [2021-06-05 14:09:04,910 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1045 transitions. Word has length 25 [2021-06-05 14:09:04,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:04,910 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1045 transitions. [2021-06-05 14:09:04,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:04,910 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1045 transitions. [2021-06-05 14:09:04,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:04,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:04,911 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:05,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:05,114 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:05,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:05,114 INFO L82 PathProgramCache]: Analyzing trace with hash 396744302, now seen corresponding path program 51 times [2021-06-05 14:09:05,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:05,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867540981] [2021-06-05 14:09:05,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:05,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:05,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867540981] [2021-06-05 14:09:05,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867540981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:05,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919822097] [2021-06-05 14:09:05,145 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 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 14:09:05,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 14:09:05,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:05,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:05,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:05,295 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 14:09:05,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919822097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:05,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:05,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 14:09:05,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681336263] [2021-06-05 14:09:05,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:05,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:05,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:05,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:05,297 INFO L87 Difference]: Start difference. First operand 469 states and 1045 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 14:09:05,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:05,918 INFO L93 Difference]: Finished difference Result 823 states and 1624 transitions. [2021-06-05 14:09:05,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:09:05,919 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 14:09:05,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:05,921 INFO L225 Difference]: With dead ends: 823 [2021-06-05 14:09:05,921 INFO L226 Difference]: Without dead ends: 817 [2021-06-05 14:09:05,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 373.1ms TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:09:05,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-06-05 14:09:05,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 469. [2021-06-05 14:09:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.230769230769231) internal successors, (1044), 468 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1044 transitions. [2021-06-05 14:09:05,929 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1044 transitions. Word has length 25 [2021-06-05 14:09:05,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:05,929 INFO L482 AbstractCegarLoop]: Abstraction has 469 states and 1044 transitions. [2021-06-05 14:09:05,929 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 14:09:05,929 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1044 transitions. [2021-06-05 14:09:05,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:05,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:05,930 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:06,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 14:09:06,130 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:06,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:06,130 INFO L82 PathProgramCache]: Analyzing trace with hash -868183558, now seen corresponding path program 52 times [2021-06-05 14:09:06,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:06,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720487444] [2021-06-05 14:09:06,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:06,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:06,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720487444] [2021-06-05 14:09:06,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720487444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:06,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573166919] [2021-06-05 14:09:06,162 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 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 14:09:06,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:06,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:06,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:06,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:06,310 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 14:09:06,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573166919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:06,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:06,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 14:09:06,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888268204] [2021-06-05 14:09:06,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:06,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:06,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:06,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:06,311 INFO L87 Difference]: Start difference. First operand 469 states and 1044 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:07,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:07,271 INFO L93 Difference]: Finished difference Result 1066 states and 2098 transitions. [2021-06-05 14:09:07,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 14:09:07,271 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:07,273 INFO L225 Difference]: With dead ends: 1066 [2021-06-05 14:09:07,273 INFO L226 Difference]: Without dead ends: 1066 [2021-06-05 14:09:07,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 574.8ms TimeCoverageRelationStatistics Valid=554, Invalid=2308, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 14:09:07,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-06-05 14:09:07,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 470. [2021-06-05 14:09:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.230277185501066) internal successors, (1046), 469 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1046 transitions. [2021-06-05 14:09:07,287 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1046 transitions. Word has length 25 [2021-06-05 14:09:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:07,288 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1046 transitions. [2021-06-05 14:09:07,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:07,288 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1046 transitions. [2021-06-05 14:09:07,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:07,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:07,289 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:07,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 14:09:07,493 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:07,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:07,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2042885656, now seen corresponding path program 53 times [2021-06-05 14:09:07,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:07,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702220007] [2021-06-05 14:09:07,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:07,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:07,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702220007] [2021-06-05 14:09:07,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702220007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:07,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317962082] [2021-06-05 14:09:07,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:07,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 14:09:07,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:07,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:07,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:07,676 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 14:09:07,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317962082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:07,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:07,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-05 14:09:07,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033374670] [2021-06-05 14:09:07,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:07,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:07,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:07,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:07,677 INFO L87 Difference]: Start difference. First operand 470 states and 1046 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:08,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:08,224 INFO L93 Difference]: Finished difference Result 912 states and 1823 transitions. [2021-06-05 14:09:08,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:09:08,225 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:08,226 INFO L225 Difference]: With dead ends: 912 [2021-06-05 14:09:08,226 INFO L226 Difference]: Without dead ends: 908 [2021-06-05 14:09:08,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 335.2ms TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:09:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-06-05 14:09:08,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 470. [2021-06-05 14:09:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.228144989339019) internal successors, (1045), 469 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1045 transitions. [2021-06-05 14:09:08,233 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1045 transitions. Word has length 25 [2021-06-05 14:09:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:08,233 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1045 transitions. [2021-06-05 14:09:08,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:08,233 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1045 transitions. [2021-06-05 14:09:08,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:08,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:08,234 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:08,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 14:09:08,434 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:08,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:08,435 INFO L82 PathProgramCache]: Analyzing trace with hash 225908030, now seen corresponding path program 54 times [2021-06-05 14:09:08,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:08,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072407777] [2021-06-05 14:09:08,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:08,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:08,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072407777] [2021-06-05 14:09:08,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072407777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:08,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833962903] [2021-06-05 14:09:08,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:09:08,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 14:09:08,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:08,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:08,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:08,639 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 14:09:08,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833962903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:08,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:08,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:09:08,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634774031] [2021-06-05 14:09:08,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:09:08,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:08,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:09:08,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:09:08,640 INFO L87 Difference]: Start difference. First operand 470 states and 1045 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:10,361 INFO L93 Difference]: Finished difference Result 1348 states and 2688 transitions. [2021-06-05 14:09:10,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 14:09:10,362 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:10,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:10,364 INFO L225 Difference]: With dead ends: 1348 [2021-06-05 14:09:10,364 INFO L226 Difference]: Without dead ends: 1348 [2021-06-05 14:09:10,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 1091.8ms TimeCoverageRelationStatistics Valid=1189, Invalid=5783, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 14:09:10,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-06-05 14:09:10,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 472. [2021-06-05 14:09:10,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.2271762208067942) internal successors, (1049), 471 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:10,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1049 transitions. [2021-06-05 14:09:10,375 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1049 transitions. Word has length 25 [2021-06-05 14:09:10,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:10,375 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1049 transitions. [2021-06-05 14:09:10,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:10,376 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1049 transitions. [2021-06-05 14:09:10,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:10,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:10,377 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:10,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 14:09:10,599 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:10,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:10,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1536539390, now seen corresponding path program 55 times [2021-06-05 14:09:10,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:10,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502409277] [2021-06-05 14:09:10,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:10,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:10,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502409277] [2021-06-05 14:09:10,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502409277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:10,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239404880] [2021-06-05 14:09:10,638 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 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 14:09:10,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:10,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:10,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:10,811 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 14:09:10,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239404880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:10,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:10,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 14:09:10,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780454291] [2021-06-05 14:09:10,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:09:10,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:10,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:09:10,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:09:10,812 INFO L87 Difference]: Start difference. First operand 472 states and 1049 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:11,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:11,440 INFO L93 Difference]: Finished difference Result 861 states and 1700 transitions. [2021-06-05 14:09:11,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 14:09:11,441 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:11,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:11,442 INFO L225 Difference]: With dead ends: 861 [2021-06-05 14:09:11,442 INFO L226 Difference]: Without dead ends: 841 [2021-06-05 14:09:11,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=330, Invalid=1740, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 14:09:11,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2021-06-05 14:09:11,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 472. [2021-06-05 14:09:11,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.2229299363057327) internal successors, (1047), 471 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1047 transitions. [2021-06-05 14:09:11,448 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1047 transitions. Word has length 25 [2021-06-05 14:09:11,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:11,448 INFO L482 AbstractCegarLoop]: Abstraction has 472 states and 1047 transitions. [2021-06-05 14:09:11,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:11,448 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1047 transitions. [2021-06-05 14:09:11,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:11,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:11,449 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:11,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:11,650 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:11,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:11,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1504861702, now seen corresponding path program 56 times [2021-06-05 14:09:11,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:11,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527930399] [2021-06-05 14:09:11,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:11,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:11,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527930399] [2021-06-05 14:09:11,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527930399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:11,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479339621] [2021-06-05 14:09:11,701 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:11,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:11,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:11,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:11,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:11,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479339621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:11,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:11,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:09:11,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951434422] [2021-06-05 14:09:11,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:11,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:11,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:11,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:11,861 INFO L87 Difference]: Start difference. First operand 472 states and 1047 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:13,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:13,640 INFO L93 Difference]: Finished difference Result 984 states and 1997 transitions. [2021-06-05 14:09:13,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 14:09:13,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:13,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:13,642 INFO L225 Difference]: With dead ends: 984 [2021-06-05 14:09:13,643 INFO L226 Difference]: Without dead ends: 982 [2021-06-05 14:09:13,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 1169.0ms TimeCoverageRelationStatistics Valid=975, Invalid=4427, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 14:09:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2021-06-05 14:09:13,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 436. [2021-06-05 14:09:13,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.197701149425287) internal successors, (956), 435 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:13,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 956 transitions. [2021-06-05 14:09:13,650 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 956 transitions. Word has length 25 [2021-06-05 14:09:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:13,650 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 956 transitions. [2021-06-05 14:09:13,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:13,650 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 956 transitions. [2021-06-05 14:09:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:13,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:13,651 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:13,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 14:09:13,851 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:13,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:13,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1309318010, now seen corresponding path program 57 times [2021-06-05 14:09:13,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:13,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528889402] [2021-06-05 14:09:13,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:13,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:13,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528889402] [2021-06-05 14:09:13,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528889402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:13,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359988823] [2021-06-05 14:09:13,893 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 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 14:09:13,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 14:09:13,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:13,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:13,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:14,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359988823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:14,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:14,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:09:14,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623564350] [2021-06-05 14:09:14,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:14,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:14,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:14,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:14,045 INFO L87 Difference]: Start difference. First operand 436 states and 956 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:14,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:14,550 INFO L93 Difference]: Finished difference Result 695 states and 1377 transitions. [2021-06-05 14:09:14,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:09:14,551 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:14,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:14,552 INFO L225 Difference]: With dead ends: 695 [2021-06-05 14:09:14,552 INFO L226 Difference]: Without dead ends: 685 [2021-06-05 14:09:14,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 403.1ms TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:09:14,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-06-05 14:09:14,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 436. [2021-06-05 14:09:14,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.193103448275862) internal successors, (954), 435 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:14,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 954 transitions. [2021-06-05 14:09:14,559 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 954 transitions. Word has length 25 [2021-06-05 14:09:14,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:14,559 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 954 transitions. [2021-06-05 14:09:14,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:14,559 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 954 transitions. [2021-06-05 14:09:14,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:14,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:14,560 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:14,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:14,760 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:14,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:14,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1091186638, now seen corresponding path program 58 times [2021-06-05 14:09:14,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:14,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323075638] [2021-06-05 14:09:14,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:14,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:14,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323075638] [2021-06-05 14:09:14,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323075638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:14,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929211400] [2021-06-05 14:09:14,804 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 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 14:09:14,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:14,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:14,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:14,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:14,966 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:14,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929211400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:14,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:14,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:09:14,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385857921] [2021-06-05 14:09:14,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:14,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:14,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:14,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:14,968 INFO L87 Difference]: Start difference. First operand 436 states and 954 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:16,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:16,561 INFO L93 Difference]: Finished difference Result 1039 states and 2080 transitions. [2021-06-05 14:09:16,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 14:09:16,561 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:16,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:16,563 INFO L225 Difference]: With dead ends: 1039 [2021-06-05 14:09:16,563 INFO L226 Difference]: Without dead ends: 1039 [2021-06-05 14:09:16,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 1116.1ms TimeCoverageRelationStatistics Valid=950, Invalid=4306, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 14:09:16,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2021-06-05 14:09:16,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 402. [2021-06-05 14:09:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.1596009975062342) internal successors, (866), 401 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 866 transitions. [2021-06-05 14:09:16,571 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 866 transitions. Word has length 25 [2021-06-05 14:09:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:16,571 INFO L482 AbstractCegarLoop]: Abstraction has 402 states and 866 transitions. [2021-06-05 14:09:16,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 866 transitions. [2021-06-05 14:09:16,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:16,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:16,572 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:16,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 14:09:16,772 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:16,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:16,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1088108690, now seen corresponding path program 59 times [2021-06-05 14:09:16,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:16,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134627555] [2021-06-05 14:09:16,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:16,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:16,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134627555] [2021-06-05 14:09:16,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134627555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:16,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136427168] [2021-06-05 14:09:16,819 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 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 14:09:16,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:09:16,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:16,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:16,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:17,000 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 14:09:17,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136427168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:17,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:17,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 14:09:17,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103733376] [2021-06-05 14:09:17,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:09:17,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:17,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:09:17,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:09:17,001 INFO L87 Difference]: Start difference. First operand 402 states and 866 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:17,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:17,576 INFO L93 Difference]: Finished difference Result 548 states and 1068 transitions. [2021-06-05 14:09:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:09:17,576 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:17,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:17,577 INFO L225 Difference]: With dead ends: 548 [2021-06-05 14:09:17,577 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 14:09:17,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 452.3ms TimeCoverageRelationStatistics Valid=310, Invalid=1582, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:09:17,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 14:09:17,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 381. [2021-06-05 14:09:17,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.168421052631579) internal successors, (824), 380 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:17,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 824 transitions. [2021-06-05 14:09:17,583 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 824 transitions. Word has length 25 [2021-06-05 14:09:17,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:17,583 INFO L482 AbstractCegarLoop]: Abstraction has 381 states and 824 transitions. [2021-06-05 14:09:17,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:17,583 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 824 transitions. [2021-06-05 14:09:17,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:17,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:17,584 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:17,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:17,807 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:17,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:17,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1258665422, now seen corresponding path program 60 times [2021-06-05 14:09:17,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:17,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545000605] [2021-06-05 14:09:17,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:17,849 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:17,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:17,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545000605] [2021-06-05 14:09:17,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545000605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:17,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060777720] [2021-06-05 14:09:17,850 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 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 14:09:17,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:09:17,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:17,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:17,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:17,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060777720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:17,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:17,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:09:17,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371112288] [2021-06-05 14:09:17,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:17,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:17,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:17,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:17,999 INFO L87 Difference]: Start difference. First operand 381 states and 824 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:18,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:18,940 INFO L93 Difference]: Finished difference Result 749 states and 1476 transitions. [2021-06-05 14:09:18,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 14:09:18,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:18,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:18,942 INFO L225 Difference]: With dead ends: 749 [2021-06-05 14:09:18,942 INFO L226 Difference]: Without dead ends: 749 [2021-06-05 14:09:18,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 662.1ms TimeCoverageRelationStatistics Valid=498, Invalid=2582, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 14:09:18,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-06-05 14:09:18,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 375. [2021-06-05 14:09:18,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 2.1550802139037435) internal successors, (806), 374 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 806 transitions. [2021-06-05 14:09:18,949 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 806 transitions. Word has length 25 [2021-06-05 14:09:18,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:18,949 INFO L482 AbstractCegarLoop]: Abstraction has 375 states and 806 transitions. [2021-06-05 14:09:18,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 806 transitions. [2021-06-05 14:09:18,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:18,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:18,950 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:19,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 14:09:19,169 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:19,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:19,169 INFO L82 PathProgramCache]: Analyzing trace with hash -172629906, now seen corresponding path program 61 times [2021-06-05 14:09:19,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:19,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504883661] [2021-06-05 14:09:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:19,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:19,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504883661] [2021-06-05 14:09:19,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504883661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:19,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4229886] [2021-06-05 14:09:19,210 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 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 14:09:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:19,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:19,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:19,355 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 14:09:19,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4229886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:19,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:19,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:09:19,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885167701] [2021-06-05 14:09:19,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:19,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:19,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:19,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:19,356 INFO L87 Difference]: Start difference. First operand 375 states and 806 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 14:09:19,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:19,933 INFO L93 Difference]: Finished difference Result 567 states and 1087 transitions. [2021-06-05 14:09:19,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 14:09:19,933 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 14:09:19,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:19,934 INFO L225 Difference]: With dead ends: 567 [2021-06-05 14:09:19,934 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 14:09:19,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 397.4ms TimeCoverageRelationStatistics Valid=316, Invalid=1754, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 14:09:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 14:09:19,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 360. [2021-06-05 14:09:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.161559888579387) internal successors, (776), 359 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 776 transitions. [2021-06-05 14:09:19,939 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 776 transitions. Word has length 25 [2021-06-05 14:09:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:19,939 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 776 transitions. [2021-06-05 14:09:19,939 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 14:09:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 776 transitions. [2021-06-05 14:09:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:19,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:19,940 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:20,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:20,140 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:20,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1976910898, now seen corresponding path program 62 times [2021-06-05 14:09:20,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:20,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396572391] [2021-06-05 14:09:20,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:20,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:20,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396572391] [2021-06-05 14:09:20,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396572391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:20,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350395334] [2021-06-05 14:09:20,175 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:20,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:20,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:20,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:20,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:20,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350395334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:20,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:20,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-05 14:09:20,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180994364] [2021-06-05 14:09:20,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:09:20,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:20,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:09:20,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:09:20,297 INFO L87 Difference]: Start difference. First operand 360 states and 776 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:20,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:20,890 INFO L93 Difference]: Finished difference Result 680 states and 1310 transitions. [2021-06-05 14:09:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 14:09:20,890 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:20,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:20,891 INFO L225 Difference]: With dead ends: 680 [2021-06-05 14:09:20,891 INFO L226 Difference]: Without dead ends: 680 [2021-06-05 14:09:20,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 458.2ms TimeCoverageRelationStatistics Valid=340, Invalid=1552, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:09:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-06-05 14:09:20,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 360. [2021-06-05 14:09:20,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.1587743732590527) internal successors, (775), 359 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:20,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 775 transitions. [2021-06-05 14:09:20,898 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 775 transitions. Word has length 25 [2021-06-05 14:09:20,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:20,898 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 775 transitions. [2021-06-05 14:09:20,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:20,898 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 775 transitions. [2021-06-05 14:09:20,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:20,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:20,899 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:21,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 14:09:21,113 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:21,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:21,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1615251090, now seen corresponding path program 63 times [2021-06-05 14:09:21,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:21,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867804198] [2021-06-05 14:09:21,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:21,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:21,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867804198] [2021-06-05 14:09:21,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867804198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:21,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848935153] [2021-06-05 14:09:21,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:21,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:09:21,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:21,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:21,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:21,280 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 14:09:21,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848935153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:21,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:21,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-05 14:09:21,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427685483] [2021-06-05 14:09:21,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:09:21,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:21,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:09:21,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:09:21,282 INFO L87 Difference]: Start difference. First operand 360 states and 775 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 14:09:21,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:21,566 INFO L93 Difference]: Finished difference Result 441 states and 888 transitions. [2021-06-05 14:09:21,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:09:21,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 14:09:21,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:21,567 INFO L225 Difference]: With dead ends: 441 [2021-06-05 14:09:21,567 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 14:09:21,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:09:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 14:09:21,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 357. [2021-06-05 14:09:21,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.1601123595505616) internal successors, (769), 356 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:21,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 769 transitions. [2021-06-05 14:09:21,571 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 769 transitions. Word has length 25 [2021-06-05 14:09:21,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:21,571 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 769 transitions. [2021-06-05 14:09:21,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 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 14:09:21,571 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 769 transitions. [2021-06-05 14:09:21,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:21,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:21,571 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:21,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:21,772 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:21,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:21,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1414788346, now seen corresponding path program 64 times [2021-06-05 14:09:21,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:21,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501020462] [2021-06-05 14:09:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:21,802 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:21,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:21,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501020462] [2021-06-05 14:09:21,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501020462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:21,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671898924] [2021-06-05 14:09:21,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:21,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:21,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:21,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:21,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:21,919 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 14:09:21,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671898924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:21,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:21,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-05 14:09:21,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747042701] [2021-06-05 14:09:21,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:09:21,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:21,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:09:21,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:09:21,920 INFO L87 Difference]: Start difference. First operand 357 states and 769 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:22,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:22,443 INFO L93 Difference]: Finished difference Result 498 states and 1005 transitions. [2021-06-05 14:09:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:09:22,443 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:22,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:22,444 INFO L225 Difference]: With dead ends: 498 [2021-06-05 14:09:22,444 INFO L226 Difference]: Without dead ends: 498 [2021-06-05 14:09:22,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 335.4ms TimeCoverageRelationStatistics Valid=297, Invalid=1035, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:09:22,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-06-05 14:09:22,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 358. [2021-06-05 14:09:22,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.1596638655462184) internal successors, (771), 357 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:22,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 771 transitions. [2021-06-05 14:09:22,450 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 771 transitions. Word has length 25 [2021-06-05 14:09:22,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:22,450 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 771 transitions. [2021-06-05 14:09:22,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:22,450 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 771 transitions. [2021-06-05 14:09:22,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:22,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:22,451 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:22,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 14:09:22,665 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:22,665 INFO L82 PathProgramCache]: Analyzing trace with hash 30890264, now seen corresponding path program 65 times [2021-06-05 14:09:22,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:22,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614176323] [2021-06-05 14:09:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:22,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:22,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614176323] [2021-06-05 14:09:22,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614176323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:22,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274628574] [2021-06-05 14:09:22,700 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:09:22,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:09:22,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:22,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:22,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:22,829 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 14:09:22,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274628574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:22,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:22,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2021-06-05 14:09:22,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961973342] [2021-06-05 14:09:22,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:09:22,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:22,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:09:22,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:09:22,831 INFO L87 Difference]: Start difference. First operand 358 states and 771 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:23,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:23,347 INFO L93 Difference]: Finished difference Result 633 states and 1215 transitions. [2021-06-05 14:09:23,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:09:23,347 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:23,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:23,348 INFO L225 Difference]: With dead ends: 633 [2021-06-05 14:09:23,349 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 14:09:23,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 390.8ms TimeCoverageRelationStatistics Valid=268, Invalid=1292, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:09:23,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 14:09:23,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 358. [2021-06-05 14:09:23,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.156862745098039) internal successors, (770), 357 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 770 transitions. [2021-06-05 14:09:23,355 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 770 transitions. Word has length 25 [2021-06-05 14:09:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:23,355 INFO L482 AbstractCegarLoop]: Abstraction has 358 states and 770 transitions. [2021-06-05 14:09:23,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 770 transitions. [2021-06-05 14:09:23,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:23,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:23,356 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:23,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 14:09:23,578 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:23,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:23,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1786087362, now seen corresponding path program 66 times [2021-06-05 14:09:23,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:23,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907053493] [2021-06-05 14:09:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:23,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:23,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907053493] [2021-06-05 14:09:23,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907053493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:23,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422940465] [2021-06-05 14:09:23,616 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 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 14:09:23,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:09:23,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:23,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:23,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:23,775 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 14:09:23,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422940465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:23,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:23,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-05 14:09:23,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237352771] [2021-06-05 14:09:23,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:09:23,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:23,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:09:23,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:09:23,777 INFO L87 Difference]: Start difference. First operand 358 states and 770 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:25,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:25,175 INFO L93 Difference]: Finished difference Result 741 states and 1512 transitions. [2021-06-05 14:09:25,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 14:09:25,175 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:25,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:25,177 INFO L225 Difference]: With dead ends: 741 [2021-06-05 14:09:25,177 INFO L226 Difference]: Without dead ends: 741 [2021-06-05 14:09:25,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2066 ImplicationChecksByTransitivity, 987.7ms TimeCoverageRelationStatistics Valid=1079, Invalid=5241, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 14:09:25,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-06-05 14:09:25,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 362. [2021-06-05 14:09:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.155124653739612) internal successors, (778), 361 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:25,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 778 transitions. [2021-06-05 14:09:25,183 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 778 transitions. Word has length 25 [2021-06-05 14:09:25,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:25,183 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 778 transitions. [2021-06-05 14:09:25,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:25,183 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 778 transitions. [2021-06-05 14:09:25,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:25,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:25,184 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:25,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 14:09:25,397 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:25,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:25,397 INFO L82 PathProgramCache]: Analyzing trace with hash -475456002, now seen corresponding path program 67 times [2021-06-05 14:09:25,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:25,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364733164] [2021-06-05 14:09:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:25,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:25,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364733164] [2021-06-05 14:09:25,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364733164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:25,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94313018] [2021-06-05 14:09:25,432 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:25,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:25,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:25,567 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 14:09:25,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94313018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:25,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:25,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 12 [2021-06-05 14:09:25,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245005824] [2021-06-05 14:09:25,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:09:25,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:25,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:09:25,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:09:25,569 INFO L87 Difference]: Start difference. First operand 362 states and 778 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:26,305 INFO L93 Difference]: Finished difference Result 727 states and 1360 transitions. [2021-06-05 14:09:26,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 14:09:26,305 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:26,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:26,306 INFO L225 Difference]: With dead ends: 727 [2021-06-05 14:09:26,306 INFO L226 Difference]: Without dead ends: 707 [2021-06-05 14:09:26,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 566.8ms TimeCoverageRelationStatistics Valid=429, Invalid=2223, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 14:09:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-06-05 14:09:26,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 362. [2021-06-05 14:09:26,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.14404432132964) internal successors, (774), 361 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 774 transitions. [2021-06-05 14:09:26,311 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 774 transitions. Word has length 25 [2021-06-05 14:09:26,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:26,311 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 774 transitions. [2021-06-05 14:09:26,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:26,312 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 774 transitions. [2021-06-05 14:09:26,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:26,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:26,312 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:26,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:26,513 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:26,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:26,513 INFO L82 PathProgramCache]: Analyzing trace with hash 778110202, now seen corresponding path program 68 times [2021-06-05 14:09:26,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:26,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672331851] [2021-06-05 14:09:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:26,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:26,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:26,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672331851] [2021-06-05 14:09:26,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672331851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:26,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788620539] [2021-06-05 14:09:26,556 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 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 14:09:26,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:09:26,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:26,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:26,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:26,680 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 14:09:26,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788620539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:26,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:26,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:09:26,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58610584] [2021-06-05 14:09:26,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:26,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:26,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:26,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:26,681 INFO L87 Difference]: Start difference. First operand 362 states and 774 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 14:09:28,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:28,723 INFO L93 Difference]: Finished difference Result 856 states and 1795 transitions. [2021-06-05 14:09:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-05 14:09:28,724 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 14:09:28,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:28,725 INFO L225 Difference]: With dead ends: 856 [2021-06-05 14:09:28,725 INFO L226 Difference]: Without dead ends: 852 [2021-06-05 14:09:28,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 1499.2ms TimeCoverageRelationStatistics Valid=1807, Invalid=7895, Unknown=0, NotChecked=0, Total=9702 [2021-06-05 14:09:28,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-06-05 14:09:28,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 366. [2021-06-05 14:09:28,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.1424657534246574) internal successors, (782), 365 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:28,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 782 transitions. [2021-06-05 14:09:28,732 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 782 transitions. Word has length 25 [2021-06-05 14:09:28,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:28,733 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 782 transitions. [2021-06-05 14:09:28,733 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 14:09:28,733 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 782 transitions. [2021-06-05 14:09:28,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:28,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:28,733 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:28,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:28,953 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:28,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash -702677382, now seen corresponding path program 69 times [2021-06-05 14:09:28,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:28,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433205129] [2021-06-05 14:09:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:28,995 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:09:28,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:28,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433205129] [2021-06-05 14:09:28,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433205129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:28,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154716719] [2021-06-05 14:09:28,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:29,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:09:29,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:29,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:29,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:29,137 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 14:09:29,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154716719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:29,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:29,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 14:09:29,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468161881] [2021-06-05 14:09:29,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:29,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:29,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:29,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:29,139 INFO L87 Difference]: Start difference. First operand 366 states and 782 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 14:09:29,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:29,967 INFO L93 Difference]: Finished difference Result 718 states and 1344 transitions. [2021-06-05 14:09:29,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 14:09:29,967 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 14:09:29,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:29,968 INFO L225 Difference]: With dead ends: 718 [2021-06-05 14:09:29,968 INFO L226 Difference]: Without dead ends: 688 [2021-06-05 14:09:29,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 674.9ms TimeCoverageRelationStatistics Valid=555, Invalid=2751, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 14:09:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2021-06-05 14:09:29,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 368. [2021-06-05 14:09:29,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.128065395095368) internal successors, (781), 367 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 781 transitions. [2021-06-05 14:09:29,976 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 781 transitions. Word has length 25 [2021-06-05 14:09:29,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:29,976 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 781 transitions. [2021-06-05 14:09:29,976 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 14:09:29,976 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 781 transitions. [2021-06-05 14:09:29,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:29,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:29,977 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:30,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:30,198 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:30,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:30,198 INFO L82 PathProgramCache]: Analyzing trace with hash -339258698, now seen corresponding path program 70 times [2021-06-05 14:09:30,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:30,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781630048] [2021-06-05 14:09:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:30,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:30,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781630048] [2021-06-05 14:09:30,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781630048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:30,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870139264] [2021-06-05 14:09:30,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:30,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:09:30,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:30,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:30,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:30,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870139264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:30,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:30,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:09:30,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564900779] [2021-06-05 14:09:30,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:30,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:30,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:30,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:30,358 INFO L87 Difference]: Start difference. First operand 368 states and 781 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:31,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:31,903 INFO L93 Difference]: Finished difference Result 714 states and 1495 transitions. [2021-06-05 14:09:31,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 14:09:31,903 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:31,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:31,904 INFO L225 Difference]: With dead ends: 714 [2021-06-05 14:09:31,904 INFO L226 Difference]: Without dead ends: 704 [2021-06-05 14:09:31,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 1127.0ms TimeCoverageRelationStatistics Valid=1023, Invalid=4233, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 14:09:31,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-06-05 14:09:31,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 355. [2021-06-05 14:09:31,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.132768361581921) internal successors, (755), 354 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:31,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 755 transitions. [2021-06-05 14:09:31,909 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 755 transitions. Word has length 25 [2021-06-05 14:09:31,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:31,909 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 755 transitions. [2021-06-05 14:09:31,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:31,909 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 755 transitions. [2021-06-05 14:09:31,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 14:09:31,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:31,910 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:32,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 14:09:32,125 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:32,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:32,125 INFO L82 PathProgramCache]: Analyzing trace with hash -19091466, now seen corresponding path program 71 times [2021-06-05 14:09:32,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:32,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546072937] [2021-06-05 14:09:32,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:32,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:32,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:32,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546072937] [2021-06-05 14:09:32,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546072937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:32,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203298716] [2021-06-05 14:09:32,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:32,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:09:32,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:32,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 14:09:32,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:09:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:32,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203298716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:32,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:09:32,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:09:32,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957568768] [2021-06-05 14:09:32,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:09:32,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:09:32,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:09:32,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:09:32,299 INFO L87 Difference]: Start difference. First operand 355 states and 755 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:32,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:09:32,804 INFO L93 Difference]: Finished difference Result 532 states and 1030 transitions. [2021-06-05 14:09:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:09:32,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 14:09:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:09:32,805 INFO L225 Difference]: With dead ends: 532 [2021-06-05 14:09:32,805 INFO L226 Difference]: Without dead ends: 518 [2021-06-05 14:09:32,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 428.1ms TimeCoverageRelationStatistics Valid=311, Invalid=1495, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:09:32,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-06-05 14:09:32,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 355. [2021-06-05 14:09:32,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.121468926553672) internal successors, (751), 354 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:32,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 751 transitions. [2021-06-05 14:09:32,808 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 751 transitions. Word has length 25 [2021-06-05 14:09:32,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:09:32,808 INFO L482 AbstractCegarLoop]: Abstraction has 355 states and 751 transitions. [2021-06-05 14:09:32,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:09:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 751 transitions. [2021-06-05 14:09:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 14:09:32,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:09:32,809 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:09:33,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:09:33,010 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:09:33,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:09:33,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1769779472, now seen corresponding path program 72 times [2021-06-05 14:09:33,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:09:33,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943288727] [2021-06-05 14:09:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:09:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:09:33,053 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:09:33,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:09:33,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943288727] [2021-06-05 14:09:33,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943288727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:09:33,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44326592] [2021-06-05 14:09:33,054 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 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 14:09:33,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:09:33,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:09:33,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 14:09:33,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-05 14:22:18,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:22:18,386 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 14:22:18,388 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 14:22:18,389 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 14:22:18,389 INFO L202 PluginConnector]: Adding new model exp1x3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 02:22:18 BasicIcfg [2021-06-05 14:22:18,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 14:22:18,390 INFO L168 Benchmark]: Toolchain (without parser) took 832386.47 ms. Allocated memory was 371.2 MB in the beginning and 820.0 MB in the end (delta: 448.8 MB). Free memory was 351.2 MB in the beginning and 500.4 MB in the end (delta: -149.2 MB). Peak memory consumption was 838.8 MB. Max. memory is 16.0 GB. [2021-06-05 14:22:18,390 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 371.2 MB. Free memory was 352.2 MB in the beginning and 352.2 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:22:18,390 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.04 ms. Allocated memory is still 371.2 MB. Free memory was 351.1 MB in the beginning and 349.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 14:22:18,390 INFO L168 Benchmark]: Boogie Preprocessor took 10.46 ms. Allocated memory is still 371.2 MB. Free memory was 349.6 MB in the beginning and 348.7 MB in the end (delta: 903.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 14:22:18,390 INFO L168 Benchmark]: RCFGBuilder took 209.13 ms. Allocated memory is still 371.2 MB. Free memory was 348.7 MB in the beginning and 339.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-05 14:22:18,390 INFO L168 Benchmark]: TraceAbstraction took 832131.53 ms. Allocated memory was 371.2 MB in the beginning and 820.0 MB in the end (delta: 448.8 MB). Free memory was 338.6 MB in the beginning and 500.4 MB in the end (delta: -161.8 MB). Peak memory consumption was 826.2 MB. Max. memory is 16.0 GB. [2021-06-05 14:22:18,391 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 0.14 ms. Allocated memory is still 371.2 MB. Free memory was 352.2 MB in the beginning and 352.2 MB in the end (delta: 65.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.04 ms. Allocated memory is still 371.2 MB. Free memory was 351.1 MB in the beginning and 349.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.46 ms. Allocated memory is still 371.2 MB. Free memory was 349.6 MB in the beginning and 348.7 MB in the end (delta: 903.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 209.13 ms. Allocated memory is still 371.2 MB. Free memory was 348.7 MB in the beginning and 339.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 832131.53 ms. Allocated memory was 371.2 MB in the beginning and 820.0 MB in the end (delta: 448.8 MB). Free memory was 338.6 MB in the beginning and 500.4 MB in the end (delta: -161.8 MB). Peak memory consumption was 826.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 33]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 431 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 33]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 431 iterations of DualJunctionQuantifierElimination. - TimeoutResultAtElement [Line: 38]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 431 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 831989.7ms, OverallIterations: 76, TraceHistogramMax: 4, EmptinessCheckTime: 68.7ms, AutomataDifference: 37955.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2402 SDtfs, 8328 SDslu, 13641 SDs, 0 SdLazy, 25775 SolverSat, 1678 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 12821.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3731 GetRequests, 1218 SyntacticMatches, 152 SemanticMatches, 2361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32165 ImplicationChecksByTransitivity, 26013.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=480occurred in iteration=51, InterpolantAutomatonStates: 2266, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 524.9ms AutomataMinimizationTime, 75 MinimizatonAttempts, 16752 StatesRemovedByMinimization, 75 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 159.4ms SsaConstructionTime, 638.6ms SatisfiabilityAnalysisTime, 10251.6ms InterpolantComputationTime, 3186 NumberOfCodeBlocks, 3186 NumberOfCodeBlocksAsserted, 280 NumberOfCheckSat, 3040 ConstructedInterpolants, 0 QuantifiedInterpolants, 16506 SizeOfPredicates, 203 NumberOfNonLiveVariables, 2812 ConjunctsInSsa, 581 ConjunctsInUnsatCore, 146 InterpolantComputations, 4 PerfectInterpolantSequences, 648/2422 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