/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 19:23:35,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 19:23:35,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 19:23:35,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 19:23:35,274 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-02-19 19:23:35,308 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 19:23:35,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 19:23:35,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 19:23:35,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 19:23:35,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 19:23:35,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 19:23:35,312 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 19:23:35,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 19:23:35,313 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 19:23:35,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 19:23:35,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 19:23:35,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 19:23:35,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 19:23:35,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 19:23:35,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 19:23:35,314 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 19:23:35,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 19:23:35,315 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 19:23:35,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 19:23:35,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 19:23:35,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 19:23:35,316 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 19:23:35,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 19:23:35,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 19:23:35,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 19:23:35,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 19:23:35,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 19:23:35,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 19:23:35,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 19:23:35,317 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 19:23:35,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 19:23:35,317 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 19:23:35,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 19:23:35,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 19:23:35,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 19:23:35,652 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 19:23:35,653 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 19:23:35,654 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl [2021-02-19 19:23:35,654 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/sorted.wvr.bpl' [2021-02-19 19:23:35,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 19:23:35,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 19:23:35,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 19:23:35,696 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 19:23:35,696 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 19:23:35,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:23:35" (1/1) ... [2021-02-19 19:23:35,715 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:23:35" (1/1) ... [2021-02-19 19:23:35,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 19:23:35,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 19:23:35,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 19:23:35,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 19:23:35,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:23:35" (1/1) ... [2021-02-19 19:23:35,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:23:35" (1/1) ... [2021-02-19 19:23:35,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:23:35" (1/1) ... [2021-02-19 19:23:35,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:23:35" (1/1) ... [2021-02-19 19:23:35,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:23:35" (1/1) ... [2021-02-19 19:23:35,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:23:35" (1/1) ... [2021-02-19 19:23:35,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:23:35" (1/1) ... [2021-02-19 19:23:35,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 19:23:35,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 19:23:35,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 19:23:35,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 19:23:35,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:23:35" (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 [2021-02-19 19:23:35,817 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 19:23:35,817 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 19:23:35,817 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 19:23:35,817 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 19:23:35,818 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 19:23:35,818 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 19:23:35,818 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 19:23:35,818 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 19:23:35,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 19:23:35,818 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-02-19 19:23:35,818 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-02-19 19:23:35,818 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-02-19 19:23:35,819 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 19:23:36,102 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 19:23:36,103 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 19:23:36,104 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:23:36 BoogieIcfgContainer [2021-02-19 19:23:36,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 19:23:36,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 19:23:36,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 19:23:36,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 19:23:36,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:23:35" (1/2) ... [2021-02-19 19:23:36,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a0c3d5b and model type sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 07:23:36, skipping insertion in model container [2021-02-19 19:23:36,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:23:36" (2/2) ... [2021-02-19 19:23:36,110 INFO L111 eAbstractionObserver]: Analyzing ICFG sorted.wvr.bpl [2021-02-19 19:23:36,114 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 19:23:36,114 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 19:23:36,118 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 19:23:36,118 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 19:23:36,167 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-02-19 19:23:36,181 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-02-19 19:23:36,198 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 19:23:36,199 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 19:23:36,199 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 19:23:36,199 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 19:23:36,199 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 19:23:36,199 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 19:23:36,199 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 19:23:36,199 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 19:23:36,208 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2021-02-19 19:23:36,233 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:36,236 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:36,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:23:36,248 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:36,249 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:36,249 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:36,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:36,258 INFO L82 PathProgramCache]: Analyzing trace with hash 470990201, now seen corresponding path program 1 times [2021-02-19 19:23:36,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:36,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068074055] [2021-02-19 19:23:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:36,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068074055] [2021-02-19 19:23:36,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:23:36,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 19:23:36,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533148094] [2021-02-19 19:23:36,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:23:36,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:36,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:23:36,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:23:36,500 INFO L87 Difference]: Start difference. First operand has 117 states, 115 states have (on average 2.756521739130435) internal successors, (317), 116 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:36,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:36,550 INFO L93 Difference]: Finished difference Result 410 states and 1170 transitions. [2021-02-19 19:23:36,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 19:23:36,551 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have 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 [2021-02-19 19:23:36,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:36,563 INFO L225 Difference]: With dead ends: 410 [2021-02-19 19:23:36,564 INFO L226 Difference]: Without dead ends: 395 [2021-02-19 19:23:36,565 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:23:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-02-19 19:23:36,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 152. [2021-02-19 19:23:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.794701986754967) internal successors, (422), 151 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:36,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 422 transitions. [2021-02-19 19:23:36,612 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 422 transitions. Word has length 21 [2021-02-19 19:23:36,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:36,613 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 422 transitions. [2021-02-19 19:23:36,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:36,614 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 422 transitions. [2021-02-19 19:23:36,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:23:36,616 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:36,616 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:36,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 19:23:36,616 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:36,617 INFO L82 PathProgramCache]: Analyzing trace with hash 288923897, now seen corresponding path program 1 times [2021-02-19 19:23:36,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:36,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594078581] [2021-02-19 19:23:36,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:36,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:36,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594078581] [2021-02-19 19:23:36,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610437707] [2021-02-19 19:23:36,713 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 [2021-02-19 19:23:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:36,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 19:23:36,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:36,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:36,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 19:23:36,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457366373] [2021-02-19 19:23:36,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:23:36,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:36,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:23:36,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:23:36,984 INFO L87 Difference]: Start difference. First operand 152 states and 422 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:37,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:37,227 INFO L93 Difference]: Finished difference Result 532 states and 1491 transitions. [2021-02-19 19:23:37,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:23:37,227 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 19:23:37,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:37,232 INFO L225 Difference]: With dead ends: 532 [2021-02-19 19:23:37,232 INFO L226 Difference]: Without dead ends: 532 [2021-02-19 19:23:37,233 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:23:37,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-02-19 19:23:37,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 165. [2021-02-19 19:23:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.8963414634146343) internal successors, (475), 164 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:37,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 475 transitions. [2021-02-19 19:23:37,252 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 475 transitions. Word has length 23 [2021-02-19 19:23:37,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:37,252 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 475 transitions. [2021-02-19 19:23:37,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:37,253 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 475 transitions. [2021-02-19 19:23:37,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:23:37,254 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:37,254 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:37,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-02-19 19:23:37,462 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:37,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:37,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1747746425, now seen corresponding path program 2 times [2021-02-19 19:23:37,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:37,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111670263] [2021-02-19 19:23:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:37,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111670263] [2021-02-19 19:23:37,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338148949] [2021-02-19 19:23:37,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:37,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:37,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:37,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 19:23:37,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:37,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:37,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:37,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 19:23:37,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185834401] [2021-02-19 19:23:37,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:23:37,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:37,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:23:37,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:23:37,754 INFO L87 Difference]: Start difference. First operand 165 states and 475 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:38,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:38,036 INFO L93 Difference]: Finished difference Result 565 states and 1578 transitions. [2021-02-19 19:23:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 19:23:38,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 19:23:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:38,045 INFO L225 Difference]: With dead ends: 565 [2021-02-19 19:23:38,045 INFO L226 Difference]: Without dead ends: 565 [2021-02-19 19:23:38,046 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:38,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-02-19 19:23:38,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 166. [2021-02-19 19:23:38,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.878787878787879) internal successors, (475), 165 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 475 transitions. [2021-02-19 19:23:38,080 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 475 transitions. Word has length 23 [2021-02-19 19:23:38,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:38,081 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 475 transitions. [2021-02-19 19:23:38,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:38,081 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 475 transitions. [2021-02-19 19:23:38,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:23:38,085 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:38,086 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:38,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:38,308 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:38,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:38,309 INFO L82 PathProgramCache]: Analyzing trace with hash -819036069, now seen corresponding path program 1 times [2021-02-19 19:23:38,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:38,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146329044] [2021-02-19 19:23:38,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:38,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:38,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146329044] [2021-02-19 19:23:38,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:23:38,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 19:23:38,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81877273] [2021-02-19 19:23:38,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 19:23:38,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:38,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 19:23:38,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:23:38,406 INFO L87 Difference]: Start difference. First operand 166 states and 475 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:38,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:38,482 INFO L93 Difference]: Finished difference Result 302 states and 837 transitions. [2021-02-19 19:23:38,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:23:38,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-02-19 19:23:38,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:38,484 INFO L225 Difference]: With dead ends: 302 [2021-02-19 19:23:38,484 INFO L226 Difference]: Without dead ends: 291 [2021-02-19 19:23:38,484 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:23:38,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-02-19 19:23:38,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 219. [2021-02-19 19:23:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.876146788990826) internal successors, (627), 218 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 627 transitions. [2021-02-19 19:23:38,496 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 627 transitions. Word has length 23 [2021-02-19 19:23:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:38,497 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 627 transitions. [2021-02-19 19:23:38,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:38,497 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 627 transitions. [2021-02-19 19:23:38,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:23:38,499 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:38,500 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:38,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 19:23:38,500 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:38,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:38,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1392402277, now seen corresponding path program 1 times [2021-02-19 19:23:38,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:38,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004325658] [2021-02-19 19:23:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:38,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004325658] [2021-02-19 19:23:38,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:23:38,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 19:23:38,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295248940] [2021-02-19 19:23:38,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:23:38,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:38,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:23:38,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:23:38,569 INFO L87 Difference]: Start difference. First operand 219 states and 627 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:38,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:38,633 INFO L93 Difference]: Finished difference Result 341 states and 932 transitions. [2021-02-19 19:23:38,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 19:23:38,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-02-19 19:23:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:38,636 INFO L225 Difference]: With dead ends: 341 [2021-02-19 19:23:38,636 INFO L226 Difference]: Without dead ends: 328 [2021-02-19 19:23:38,636 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-19 19:23:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-02-19 19:23:38,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 249. [2021-02-19 19:23:38,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.879032258064516) internal successors, (714), 248 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 714 transitions. [2021-02-19 19:23:38,644 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 714 transitions. Word has length 23 [2021-02-19 19:23:38,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:38,645 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 714 transitions. [2021-02-19 19:23:38,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:38,645 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 714 transitions. [2021-02-19 19:23:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:23:38,646 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:38,646 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:38,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 19:23:38,646 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:38,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:38,647 INFO L82 PathProgramCache]: Analyzing trace with hash 584385523, now seen corresponding path program 2 times [2021-02-19 19:23:38,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:38,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231547205] [2021-02-19 19:23:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:38,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231547205] [2021-02-19 19:23:38,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348783541] [2021-02-19 19:23:38,713 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:23:38,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:38,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:38,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:38,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:38,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-02-19 19:23:38,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333840853] [2021-02-19 19:23:38,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:23:38,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:38,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:23:38,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:23:38,857 INFO L87 Difference]: Start difference. First operand 249 states and 714 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:38,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:38,916 INFO L93 Difference]: Finished difference Result 311 states and 872 transitions. [2021-02-19 19:23:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 19:23:38,916 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 19:23:38,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:38,918 INFO L225 Difference]: With dead ends: 311 [2021-02-19 19:23:38,918 INFO L226 Difference]: Without dead ends: 311 [2021-02-19 19:23:38,918 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:23:38,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-02-19 19:23:38,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 231. [2021-02-19 19:23:38,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.856521739130435) internal successors, (657), 230 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:38,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 657 transitions. [2021-02-19 19:23:38,927 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 657 transitions. Word has length 23 [2021-02-19 19:23:38,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:38,927 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 657 transitions. [2021-02-19 19:23:38,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 657 transitions. [2021-02-19 19:23:38,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:23:38,928 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:38,928 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:39,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:39,149 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:39,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:39,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1181379827, now seen corresponding path program 3 times [2021-02-19 19:23:39,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:39,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370454668] [2021-02-19 19:23:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:39,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370454668] [2021-02-19 19:23:39,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264684906] [2021-02-19 19:23:39,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:23:39,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:23:39,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:39,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 19:23:39,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:39,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:39,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-02-19 19:23:39,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043172171] [2021-02-19 19:23:39,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:23:39,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:39,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:23:39,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:23:39,323 INFO L87 Difference]: Start difference. First operand 231 states and 657 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:39,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:39,504 INFO L93 Difference]: Finished difference Result 520 states and 1433 transitions. [2021-02-19 19:23:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:23:39,504 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 19:23:39,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:39,507 INFO L225 Difference]: With dead ends: 520 [2021-02-19 19:23:39,507 INFO L226 Difference]: Without dead ends: 520 [2021-02-19 19:23:39,507 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:23:39,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-02-19 19:23:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 231. [2021-02-19 19:23:39,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.856521739130435) internal successors, (657), 230 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 657 transitions. [2021-02-19 19:23:39,516 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 657 transitions. Word has length 23 [2021-02-19 19:23:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:39,516 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 657 transitions. [2021-02-19 19:23:39,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:39,516 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 657 transitions. [2021-02-19 19:23:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:23:39,517 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:39,517 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:39,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:39,730 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:39,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1772322527, now seen corresponding path program 2 times [2021-02-19 19:23:39,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:39,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897073328] [2021-02-19 19:23:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:39,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:39,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897073328] [2021-02-19 19:23:39,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:23:39,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 19:23:39,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815944673] [2021-02-19 19:23:39,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:23:39,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:39,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:23:39,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:23:39,786 INFO L87 Difference]: Start difference. First operand 231 states and 657 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:39,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:39,824 INFO L93 Difference]: Finished difference Result 253 states and 731 transitions. [2021-02-19 19:23:39,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 19:23:39,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-02-19 19:23:39,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:39,826 INFO L225 Difference]: With dead ends: 253 [2021-02-19 19:23:39,826 INFO L226 Difference]: Without dead ends: 253 [2021-02-19 19:23:39,826 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:23:39,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-02-19 19:23:39,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 209. [2021-02-19 19:23:39,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.889423076923077) internal successors, (601), 208 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:39,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 601 transitions. [2021-02-19 19:23:39,832 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 601 transitions. Word has length 23 [2021-02-19 19:23:39,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:39,832 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 601 transitions. [2021-02-19 19:23:39,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 601 transitions. [2021-02-19 19:23:39,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:23:39,833 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:39,833 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:39,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 19:23:39,833 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:39,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1797454963, now seen corresponding path program 3 times [2021-02-19 19:23:39,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:39,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145141539] [2021-02-19 19:23:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:39,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145141539] [2021-02-19 19:23:39,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:23:39,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 19:23:39,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466120897] [2021-02-19 19:23:39,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 19:23:39,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:39,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 19:23:39,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:23:39,870 INFO L87 Difference]: Start difference. First operand 209 states and 601 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:39,921 INFO L93 Difference]: Finished difference Result 240 states and 689 transitions. [2021-02-19 19:23:39,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 19:23:39,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-02-19 19:23:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:39,932 INFO L225 Difference]: With dead ends: 240 [2021-02-19 19:23:39,932 INFO L226 Difference]: Without dead ends: 240 [2021-02-19 19:23:39,932 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:23:39,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-02-19 19:23:39,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 178. [2021-02-19 19:23:39,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.8587570621468927) internal successors, (506), 177 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) [2021-02-19 19:23:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 506 transitions. [2021-02-19 19:23:39,937 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 506 transitions. Word has length 23 [2021-02-19 19:23:39,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:39,937 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 506 transitions. [2021-02-19 19:23:39,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:39,937 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 506 transitions. [2021-02-19 19:23:39,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:23:39,938 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:39,938 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:39,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 19:23:39,938 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:39,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:39,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1913841263, now seen corresponding path program 4 times [2021-02-19 19:23:39,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:39,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805063659] [2021-02-19 19:23:39,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:39,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805063659] [2021-02-19 19:23:39,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:23:39,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 19:23:39,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344969471] [2021-02-19 19:23:39,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 19:23:39,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:39,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 19:23:39,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:23:39,993 INFO L87 Difference]: Start difference. First operand 178 states and 506 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:40,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:40,080 INFO L93 Difference]: Finished difference Result 255 states and 720 transitions. [2021-02-19 19:23:40,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:23:40,080 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-02-19 19:23:40,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:40,082 INFO L225 Difference]: With dead ends: 255 [2021-02-19 19:23:40,082 INFO L226 Difference]: Without dead ends: 251 [2021-02-19 19:23:40,082 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:23:40,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-02-19 19:23:40,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 178. [2021-02-19 19:23:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.847457627118644) internal successors, (504), 177 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 504 transitions. [2021-02-19 19:23:40,088 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 504 transitions. Word has length 23 [2021-02-19 19:23:40,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:40,088 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 504 transitions. [2021-02-19 19:23:40,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:40,088 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 504 transitions. [2021-02-19 19:23:40,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:23:40,089 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:40,089 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:40,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 19:23:40,089 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:40,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:40,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1107769745, now seen corresponding path program 5 times [2021-02-19 19:23:40,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:40,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931904467] [2021-02-19 19:23:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:40,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:40,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931904467] [2021-02-19 19:23:40,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:23:40,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 19:23:40,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578174011] [2021-02-19 19:23:40,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 19:23:40,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:40,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 19:23:40,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:23:40,145 INFO L87 Difference]: Start difference. First operand 178 states and 504 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:40,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:40,262 INFO L93 Difference]: Finished difference Result 331 states and 903 transitions. [2021-02-19 19:23:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 19:23:40,262 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-02-19 19:23:40,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:40,264 INFO L225 Difference]: With dead ends: 331 [2021-02-19 19:23:40,264 INFO L226 Difference]: Without dead ends: 327 [2021-02-19 19:23:40,264 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:23:40,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-02-19 19:23:40,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 198. [2021-02-19 19:23:40,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.83248730964467) internal successors, (558), 197 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) [2021-02-19 19:23:40,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 558 transitions. [2021-02-19 19:23:40,271 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 558 transitions. Word has length 23 [2021-02-19 19:23:40,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:40,272 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 558 transitions. [2021-02-19 19:23:40,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:40,272 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 558 transitions. [2021-02-19 19:23:40,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:23:40,273 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:40,273 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:40,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-19 19:23:40,274 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:40,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:40,274 INFO L82 PathProgramCache]: Analyzing trace with hash -129212301, now seen corresponding path program 6 times [2021-02-19 19:23:40,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:40,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950356079] [2021-02-19 19:23:40,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:40,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950356079] [2021-02-19 19:23:40,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:23:40,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 19:23:40,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563135843] [2021-02-19 19:23:40,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 19:23:40,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:40,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 19:23:40,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:23:40,325 INFO L87 Difference]: Start difference. First operand 198 states and 558 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:40,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:40,463 INFO L93 Difference]: Finished difference Result 313 states and 871 transitions. [2021-02-19 19:23:40,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 19:23:40,465 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-02-19 19:23:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:40,468 INFO L225 Difference]: With dead ends: 313 [2021-02-19 19:23:40,468 INFO L226 Difference]: Without dead ends: 313 [2021-02-19 19:23:40,469 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:23:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-02-19 19:23:40,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 182. [2021-02-19 19:23:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.839779005524862) internal successors, (514), 181 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 514 transitions. [2021-02-19 19:23:40,476 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 514 transitions. Word has length 23 [2021-02-19 19:23:40,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:40,476 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 514 transitions. [2021-02-19 19:23:40,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:40,477 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 514 transitions. [2021-02-19 19:23:40,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:23:40,477 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:40,477 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:40,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-19 19:23:40,478 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:40,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:40,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1824202523, now seen corresponding path program 1 times [2021-02-19 19:23:40,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:40,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978286271] [2021-02-19 19:23:40,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:40,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978286271] [2021-02-19 19:23:40,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124637529] [2021-02-19 19:23:40,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:40,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 19:23:40,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:41,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:23:41,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:23:41,476 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-02-19 19:23:41,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 23 [2021-02-19 19:23:41,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:41,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:41,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:23:41,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:23:41,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:41,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2021-02-19 19:23:41,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:41,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:41,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:23:41,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:23:41,638 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-02-19 19:23:41,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 21 [2021-02-19 19:23:41,640 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:41,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:41,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:23:41,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:23:41,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:41,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2021-02-19 19:23:41,736 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:41,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:41,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 4 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 19:23:41,792 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 8 variables, input treesize:121, output treesize:51 [2021-02-19 19:23:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:41,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:41,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-02-19 19:23:41,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978515041] [2021-02-19 19:23:41,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:23:41,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:41,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:23:41,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:41,914 INFO L87 Difference]: Start difference. First operand 182 states and 514 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:42,746 INFO L93 Difference]: Finished difference Result 545 states and 1590 transitions. [2021-02-19 19:23:42,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:23:42,746 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:23:42,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:42,749 INFO L225 Difference]: With dead ends: 545 [2021-02-19 19:23:42,749 INFO L226 Difference]: Without dead ends: 515 [2021-02-19 19:23:42,750 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:23:42,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-02-19 19:23:42,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 236. [2021-02-19 19:23:42,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.948936170212766) internal successors, (693), 235 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:42,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 693 transitions. [2021-02-19 19:23:42,758 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 693 transitions. Word has length 25 [2021-02-19 19:23:42,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:42,758 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 693 transitions. [2021-02-19 19:23:42,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:42,759 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 693 transitions. [2021-02-19 19:23:42,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:23:42,759 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:42,759 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:42,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 19:23:42,974 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:42,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:42,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1830823175, now seen corresponding path program 2 times [2021-02-19 19:23:42,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:42,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940837820] [2021-02-19 19:23:42,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:43,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940837820] [2021-02-19 19:23:43,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590513861] [2021-02-19 19:23:43,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:43,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:43,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:43,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 19:23:43,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:43,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:23:43,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:23:43,576 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-02-19 19:23:43,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 19 [2021-02-19 19:23:43,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:43,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:23:43,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:23:43,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:43,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-02-19 19:23:43,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:43,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:23:43,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:23:43,658 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-02-19 19:23:43,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 21 [2021-02-19 19:23:43,663 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:43,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:23:43,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:23:43,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:23:43,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 33 [2021-02-19 19:23:43,694 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:23:43,748 INFO L628 ElimStorePlain]: treesize reduction 18, result has 66.0 percent of original size [2021-02-19 19:23:43,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:23:43,751 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:109, output treesize:35 [2021-02-19 19:23:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:43,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:43,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-02-19 19:23:43,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337731330] [2021-02-19 19:23:43,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:23:43,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:43,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:23:43,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:23:43,859 INFO L87 Difference]: Start difference. First operand 236 states and 693 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:44,992 INFO L93 Difference]: Finished difference Result 697 states and 2045 transitions. [2021-02-19 19:23:44,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:23:44,993 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:23:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:44,996 INFO L225 Difference]: With dead ends: 697 [2021-02-19 19:23:44,996 INFO L226 Difference]: Without dead ends: 682 [2021-02-19 19:23:44,997 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=346, Invalid=1136, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:23:44,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-02-19 19:23:45,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 256. [2021-02-19 19:23:45,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.011764705882353) internal successors, (768), 255 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 768 transitions. [2021-02-19 19:23:45,006 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 768 transitions. Word has length 25 [2021-02-19 19:23:45,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:45,006 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 768 transitions. [2021-02-19 19:23:45,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:45,006 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 768 transitions. [2021-02-19 19:23:45,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:23:45,007 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:45,007 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:45,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 19:23:45,222 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:45,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:45,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1460170245, now seen corresponding path program 3 times [2021-02-19 19:23:45,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:45,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638836103] [2021-02-19 19:23:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:45,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638836103] [2021-02-19 19:23:45,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197619313] [2021-02-19 19:23:45,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:45,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:23:45,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:45,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 19:23:45,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:45,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:45,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:23:45,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116641446] [2021-02-19 19:23:45,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:23:45,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:45,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:23:45,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:23:45,928 INFO L87 Difference]: Start difference. First operand 256 states and 768 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:46,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:46,156 INFO L93 Difference]: Finished difference Result 450 states and 1268 transitions. [2021-02-19 19:23:46,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 19:23:46,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:23:46,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:46,167 INFO L225 Difference]: With dead ends: 450 [2021-02-19 19:23:46,167 INFO L226 Difference]: Without dead ends: 435 [2021-02-19 19:23:46,167 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:46,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-02-19 19:23:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 280. [2021-02-19 19:23:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.96415770609319) internal successors, (827), 279 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:46,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 827 transitions. [2021-02-19 19:23:46,175 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 827 transitions. Word has length 25 [2021-02-19 19:23:46,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:46,175 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 827 transitions. [2021-02-19 19:23:46,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:46,175 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 827 transitions. [2021-02-19 19:23:46,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:23:46,176 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:46,176 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:46,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:46,398 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:46,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1257660231, now seen corresponding path program 4 times [2021-02-19 19:23:46,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:46,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354383272] [2021-02-19 19:23:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:46,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354383272] [2021-02-19 19:23:46,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647482858] [2021-02-19 19:23:46,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:46,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:23:46,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:46,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 19:23:46,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:47,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:47,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-02-19 19:23:47,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455388349] [2021-02-19 19:23:47,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:23:47,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:47,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:23:47,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:23:47,024 INFO L87 Difference]: Start difference. First operand 280 states and 827 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:47,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:47,262 INFO L93 Difference]: Finished difference Result 406 states and 1141 transitions. [2021-02-19 19:23:47,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 19:23:47,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:23:47,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:47,264 INFO L225 Difference]: With dead ends: 406 [2021-02-19 19:23:47,264 INFO L226 Difference]: Without dead ends: 391 [2021-02-19 19:23:47,264 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:23:47,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-02-19 19:23:47,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 274. [2021-02-19 19:23:47,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.9523809523809526) internal successors, (806), 273 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) [2021-02-19 19:23:47,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 806 transitions. [2021-02-19 19:23:47,271 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 806 transitions. Word has length 25 [2021-02-19 19:23:47,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:47,271 INFO L480 AbstractCegarLoop]: Abstraction has 274 states and 806 transitions. [2021-02-19 19:23:47,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:47,271 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 806 transitions. [2021-02-19 19:23:47,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:23:47,272 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:47,272 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:47,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-02-19 19:23:47,482 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:47,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:47,482 INFO L82 PathProgramCache]: Analyzing trace with hash -264461285, now seen corresponding path program 1 times [2021-02-19 19:23:47,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:47,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041556861] [2021-02-19 19:23:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:47,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041556861] [2021-02-19 19:23:47,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614254269] [2021-02-19 19:23:47,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:23:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:47,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 19:23:47,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:47,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:47,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-02-19 19:23:47,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402393121] [2021-02-19 19:23:47,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:23:47,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:47,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:23:47,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:23:47,744 INFO L87 Difference]: Start difference. First operand 274 states and 806 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:47,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:47,818 INFO L93 Difference]: Finished difference Result 469 states and 1371 transitions. [2021-02-19 19:23:47,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 19:23:47,819 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:23:47,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:47,821 INFO L225 Difference]: With dead ends: 469 [2021-02-19 19:23:47,821 INFO L226 Difference]: Without dead ends: 454 [2021-02-19 19:23:47,822 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:23:47,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-02-19 19:23:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 306. [2021-02-19 19:23:47,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.944262295081967) internal successors, (898), 305 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:47,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 898 transitions. [2021-02-19 19:23:47,842 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 898 transitions. Word has length 25 [2021-02-19 19:23:47,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:47,843 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 898 transitions. [2021-02-19 19:23:47,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:47,843 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 898 transitions. [2021-02-19 19:23:47,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:23:47,844 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:47,844 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:48,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:48,062 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:48,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:48,063 INFO L82 PathProgramCache]: Analyzing trace with hash 774649499, now seen corresponding path program 2 times [2021-02-19 19:23:48,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:48,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059425033] [2021-02-19 19:23:48,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:48,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059425033] [2021-02-19 19:23:48,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709886931] [2021-02-19 19:23:48,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:23:48,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:48,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:48,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 19:23:48,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:48,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:48,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-02-19 19:23:48,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737160257] [2021-02-19 19:23:48,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:23:48,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:48,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:23:48,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:23:48,302 INFO L87 Difference]: Start difference. First operand 306 states and 898 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:48,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:48,372 INFO L93 Difference]: Finished difference Result 491 states and 1441 transitions. [2021-02-19 19:23:48,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 19:23:48,373 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:23:48,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:48,375 INFO L225 Difference]: With dead ends: 491 [2021-02-19 19:23:48,375 INFO L226 Difference]: Without dead ends: 476 [2021-02-19 19:23:48,375 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:23:48,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-02-19 19:23:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 312. [2021-02-19 19:23:48,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.945337620578778) internal successors, (916), 311 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 916 transitions. [2021-02-19 19:23:48,390 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 916 transitions. Word has length 25 [2021-02-19 19:23:48,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:48,391 INFO L480 AbstractCegarLoop]: Abstraction has 312 states and 916 transitions. [2021-02-19 19:23:48,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 916 transitions. [2021-02-19 19:23:48,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:23:48,395 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:48,395 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:48,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:48,610 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:48,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:48,610 INFO L82 PathProgramCache]: Analyzing trace with hash -241787715, now seen corresponding path program 5 times [2021-02-19 19:23:48,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:48,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439942901] [2021-02-19 19:23:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:48,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439942901] [2021-02-19 19:23:48,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807594912] [2021-02-19 19:23:48,660 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 [2021-02-19 19:23:48,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:23:48,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:48,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:23:48,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:48,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:48,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:23:48,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105486124] [2021-02-19 19:23:48,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:23:48,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:48,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:23:48,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:23:48,776 INFO L87 Difference]: Start difference. First operand 312 states and 916 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-02-19 19:23:48,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:48,926 INFO L93 Difference]: Finished difference Result 446 states and 1312 transitions. [2021-02-19 19:23:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:23:48,930 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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 27 [2021-02-19 19:23:48,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:48,932 INFO L225 Difference]: With dead ends: 446 [2021-02-19 19:23:48,932 INFO L226 Difference]: Without dead ends: 446 [2021-02-19 19:23:48,933 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:23:48,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-02-19 19:23:48,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 370. [2021-02-19 19:23:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.035230352303523) internal successors, (1120), 369 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1120 transitions. [2021-02-19 19:23:48,956 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1120 transitions. Word has length 27 [2021-02-19 19:23:48,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:48,956 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 1120 transitions. [2021-02-19 19:23:48,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-02-19 19:23:48,956 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1120 transitions. [2021-02-19 19:23:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:23:48,959 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:48,959 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:49,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-02-19 19:23:49,177 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:49,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:49,177 INFO L82 PathProgramCache]: Analyzing trace with hash 642267385, now seen corresponding path program 6 times [2021-02-19 19:23:49,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:49,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119224503] [2021-02-19 19:23:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:49,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119224503] [2021-02-19 19:23:49,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493901313] [2021-02-19 19:23:49,241 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 [2021-02-19 19:23:49,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:23:49,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:49,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:23:49,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:49,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:49,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:23:49,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643642727] [2021-02-19 19:23:49,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:23:49,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:49,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:23:49,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:23:49,371 INFO L87 Difference]: Start difference. First operand 370 states and 1120 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-02-19 19:23:49,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:49,840 INFO L93 Difference]: Finished difference Result 1017 states and 2828 transitions. [2021-02-19 19:23:49,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 19:23:49,840 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) 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 27 [2021-02-19 19:23:49,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:49,844 INFO L225 Difference]: With dead ends: 1017 [2021-02-19 19:23:49,844 INFO L226 Difference]: Without dead ends: 1017 [2021-02-19 19:23:49,845 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=337, Invalid=1069, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 19:23:49,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2021-02-19 19:23:49,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 409. [2021-02-19 19:23:49,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 3.1151960784313726) internal successors, (1271), 408 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:49,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1271 transitions. [2021-02-19 19:23:49,861 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1271 transitions. Word has length 27 [2021-02-19 19:23:49,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:49,861 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 1271 transitions. [2021-02-19 19:23:49,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-02-19 19:23:49,861 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1271 transitions. [2021-02-19 19:23:49,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:23:49,862 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:49,862 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:50,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-02-19 19:23:50,078 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:50,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:50,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1964515773, now seen corresponding path program 1 times [2021-02-19 19:23:50,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:50,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572583886] [2021-02-19 19:23:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:50,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572583886] [2021-02-19 19:23:50,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66317558] [2021-02-19 19:23:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:50,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:23:50,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:50,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:50,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:50,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 19:23:50,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882817402] [2021-02-19 19:23:50,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:23:50,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:50,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:23:50,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:23:50,236 INFO L87 Difference]: Start difference. First operand 409 states and 1271 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) 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) [2021-02-19 19:23:50,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:50,449 INFO L93 Difference]: Finished difference Result 838 states and 2442 transitions. [2021-02-19 19:23:50,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:23:50,450 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) 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 27 [2021-02-19 19:23:50,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:50,452 INFO L225 Difference]: With dead ends: 838 [2021-02-19 19:23:50,452 INFO L226 Difference]: Without dead ends: 832 [2021-02-19 19:23:50,453 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-02-19 19:23:50,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 522. [2021-02-19 19:23:50,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.1861804222648753) internal successors, (1660), 521 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1660 transitions. [2021-02-19 19:23:50,468 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1660 transitions. Word has length 27 [2021-02-19 19:23:50,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:50,468 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 1660 transitions. [2021-02-19 19:23:50,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) 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) [2021-02-19 19:23:50,468 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1660 transitions. [2021-02-19 19:23:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:23:50,469 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:50,469 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:50,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-02-19 19:23:50,691 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:50,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1233210085, now seen corresponding path program 2 times [2021-02-19 19:23:50,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:50,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144884499] [2021-02-19 19:23:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:50,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144884499] [2021-02-19 19:23:50,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963741947] [2021-02-19 19:23:50,747 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 [2021-02-19 19:23:50,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:50,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:50,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:23:50,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:50,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:50,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 19:23:50,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828856798] [2021-02-19 19:23:50,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:23:50,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:50,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:23:50,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:23:50,870 INFO L87 Difference]: Start difference. First operand 522 states and 1660 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) 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) [2021-02-19 19:23:51,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:51,077 INFO L93 Difference]: Finished difference Result 905 states and 2647 transitions. [2021-02-19 19:23:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:23:51,077 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) 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 27 [2021-02-19 19:23:51,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:51,080 INFO L225 Difference]: With dead ends: 905 [2021-02-19 19:23:51,080 INFO L226 Difference]: Without dead ends: 905 [2021-02-19 19:23:51,080 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:23:51,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-02-19 19:23:51,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 524. [2021-02-19 19:23:51,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 3.1720841300191203) internal successors, (1659), 523 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:51,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1659 transitions. [2021-02-19 19:23:51,096 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1659 transitions. Word has length 27 [2021-02-19 19:23:51,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:51,096 INFO L480 AbstractCegarLoop]: Abstraction has 524 states and 1659 transitions. [2021-02-19 19:23:51,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) 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) [2021-02-19 19:23:51,096 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1659 transitions. [2021-02-19 19:23:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:23:51,098 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:51,098 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:51,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:51,314 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:51,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:51,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1374728821, now seen corresponding path program 7 times [2021-02-19 19:23:51,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:51,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432970565] [2021-02-19 19:23:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:51,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432970565] [2021-02-19 19:23:51,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45334558] [2021-02-19 19:23:51,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:51,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:23:51,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:51,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:51,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:23:51,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170678922] [2021-02-19 19:23:51,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:23:51,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:51,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:23:51,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:23:51,471 INFO L87 Difference]: Start difference. First operand 524 states and 1659 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-02-19 19:23:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:51,865 INFO L93 Difference]: Finished difference Result 1149 states and 3311 transitions. [2021-02-19 19:23:51,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:23:51,866 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) 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 27 [2021-02-19 19:23:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:51,870 INFO L225 Difference]: With dead ends: 1149 [2021-02-19 19:23:51,870 INFO L226 Difference]: Without dead ends: 1145 [2021-02-19 19:23:51,870 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:23:51,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2021-02-19 19:23:51,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 528. [2021-02-19 19:23:51,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.159392789373814) internal successors, (1665), 527 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:51,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1665 transitions. [2021-02-19 19:23:51,887 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1665 transitions. Word has length 27 [2021-02-19 19:23:51,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:51,888 INFO L480 AbstractCegarLoop]: Abstraction has 528 states and 1665 transitions. [2021-02-19 19:23:51,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-02-19 19:23:51,888 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1665 transitions. [2021-02-19 19:23:51,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:23:51,889 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:51,889 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:52,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:52,112 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:52,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:52,112 INFO L82 PathProgramCache]: Analyzing trace with hash 790310945, now seen corresponding path program 3 times [2021-02-19 19:23:52,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:52,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976823653] [2021-02-19 19:23:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:52,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976823653] [2021-02-19 19:23:52,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928942969] [2021-02-19 19:23:52,156 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 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 [2021-02-19 19:23:52,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:23:52,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:52,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:23:52,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:52,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:52,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 19:23:52,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880415577] [2021-02-19 19:23:52,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:23:52,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:52,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:23:52,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:23:52,265 INFO L87 Difference]: Start difference. First operand 528 states and 1665 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) 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) [2021-02-19 19:23:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:52,430 INFO L93 Difference]: Finished difference Result 751 states and 2328 transitions. [2021-02-19 19:23:52,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 19:23:52,430 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) 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 27 [2021-02-19 19:23:52,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:52,433 INFO L225 Difference]: With dead ends: 751 [2021-02-19 19:23:52,433 INFO L226 Difference]: Without dead ends: 751 [2021-02-19 19:23:52,433 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:23:52,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-02-19 19:23:52,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 540. [2021-02-19 19:23:52,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 3.1521335807050095) internal successors, (1699), 539 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:52,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1699 transitions. [2021-02-19 19:23:52,445 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1699 transitions. Word has length 27 [2021-02-19 19:23:52,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:52,445 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1699 transitions. [2021-02-19 19:23:52,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) 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) [2021-02-19 19:23:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1699 transitions. [2021-02-19 19:23:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:23:52,447 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:52,447 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:52,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:52,662 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:52,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:52,662 INFO L82 PathProgramCache]: Analyzing trace with hash -849358215, now seen corresponding path program 8 times [2021-02-19 19:23:52,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:52,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421772508] [2021-02-19 19:23:52,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:52,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421772508] [2021-02-19 19:23:52,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743240692] [2021-02-19 19:23:52,707 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 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 [2021-02-19 19:23:52,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:52,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:52,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:23:52,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:52,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:52,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:23:52,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646101704] [2021-02-19 19:23:52,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:23:52,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:52,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:23:52,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:23:52,800 INFO L87 Difference]: Start difference. First operand 540 states and 1699 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:52,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:52,997 INFO L93 Difference]: Finished difference Result 983 states and 2946 transitions. [2021-02-19 19:23:52,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:23:52,997 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:23:52,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:53,000 INFO L225 Difference]: With dead ends: 983 [2021-02-19 19:23:53,000 INFO L226 Difference]: Without dead ends: 971 [2021-02-19 19:23:53,000 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:23:53,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-02-19 19:23:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 558. [2021-02-19 19:23:53,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 3.1382405745062836) internal successors, (1748), 557 states have internal predecessors, (1748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1748 transitions. [2021-02-19 19:23:53,014 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1748 transitions. Word has length 27 [2021-02-19 19:23:53,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:53,014 INFO L480 AbstractCegarLoop]: Abstraction has 558 states and 1748 transitions. [2021-02-19 19:23:53,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:53,014 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1748 transitions. [2021-02-19 19:23:53,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:23:53,015 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:53,015 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:53,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:53,230 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:53,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:53,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1037766645, now seen corresponding path program 9 times [2021-02-19 19:23:53,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:53,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304559181] [2021-02-19 19:23:53,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:53,273 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:53,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304559181] [2021-02-19 19:23:53,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638897768] [2021-02-19 19:23:53,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:53,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:23:53,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:53,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:23:53,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:53,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:53,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:23:53,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309081303] [2021-02-19 19:23:53,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:23:53,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:53,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:23:53,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:23:53,390 INFO L87 Difference]: Start difference. First operand 558 states and 1748 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-02-19 19:23:53,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:53,603 INFO L93 Difference]: Finished difference Result 983 states and 2948 transitions. [2021-02-19 19:23:53,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:23:53,603 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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 27 [2021-02-19 19:23:53,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:53,606 INFO L225 Difference]: With dead ends: 983 [2021-02-19 19:23:53,606 INFO L226 Difference]: Without dead ends: 983 [2021-02-19 19:23:53,606 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:23:53,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-02-19 19:23:53,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 567. [2021-02-19 19:23:53,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.1696113074204946) internal successors, (1794), 566 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1794 transitions. [2021-02-19 19:23:53,619 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1794 transitions. Word has length 27 [2021-02-19 19:23:53,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:53,619 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 1794 transitions. [2021-02-19 19:23:53,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-02-19 19:23:53,619 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1794 transitions. [2021-02-19 19:23:53,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:23:53,620 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:53,621 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:53,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-02-19 19:23:53,839 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:53,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:53,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1634760949, now seen corresponding path program 10 times [2021-02-19 19:23:53,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:53,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442589952] [2021-02-19 19:23:53,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:53,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442589952] [2021-02-19 19:23:53,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26922174] [2021-02-19 19:23:53,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:53,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:23:53,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:53,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:23:53,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:53,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:53,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:23:53,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107139153] [2021-02-19 19:23:53,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:23:53,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:53,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:23:53,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:23:53,995 INFO L87 Difference]: Start difference. First operand 567 states and 1794 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-02-19 19:23:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:54,497 INFO L93 Difference]: Finished difference Result 1871 states and 5394 transitions. [2021-02-19 19:23:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:23:54,497 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) 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 27 [2021-02-19 19:23:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:54,504 INFO L225 Difference]: With dead ends: 1871 [2021-02-19 19:23:54,504 INFO L226 Difference]: Without dead ends: 1871 [2021-02-19 19:23:54,505 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=357, Invalid=1125, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:23:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-02-19 19:23:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 640. [2021-02-19 19:23:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 3.29264475743349) internal successors, (2104), 639 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 2104 transitions. [2021-02-19 19:23:54,527 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 2104 transitions. Word has length 27 [2021-02-19 19:23:54,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:54,528 INFO L480 AbstractCegarLoop]: Abstraction has 640 states and 2104 transitions. [2021-02-19 19:23:54,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-02-19 19:23:54,528 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 2104 transitions. [2021-02-19 19:23:54,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:23:54,529 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:54,529 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:54,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:54,751 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:54,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:54,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1927744911, now seen corresponding path program 11 times [2021-02-19 19:23:54,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:54,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181303159] [2021-02-19 19:23:54,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:54,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181303159] [2021-02-19 19:23:54,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237898427] [2021-02-19 19:23:54,790 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 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 [2021-02-19 19:23:54,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:23:54,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:54,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:23:54,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:54,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:54,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:23:54,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051866580] [2021-02-19 19:23:54,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:23:54,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:54,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:23:54,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:23:54,907 INFO L87 Difference]: Start difference. First operand 640 states and 2104 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-02-19 19:23:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:55,357 INFO L93 Difference]: Finished difference Result 1774 states and 5180 transitions. [2021-02-19 19:23:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 19:23:55,357 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) 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 27 [2021-02-19 19:23:55,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:55,362 INFO L225 Difference]: With dead ends: 1774 [2021-02-19 19:23:55,362 INFO L226 Difference]: Without dead ends: 1766 [2021-02-19 19:23:55,362 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:23:55,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2021-02-19 19:23:55,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 628. [2021-02-19 19:23:55,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 627 states have (on average 3.291866028708134) internal successors, (2064), 627 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:55,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2064 transitions. [2021-02-19 19:23:55,383 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2064 transitions. Word has length 27 [2021-02-19 19:23:55,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:55,383 INFO L480 AbstractCegarLoop]: Abstraction has 628 states and 2064 transitions. [2021-02-19 19:23:55,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-02-19 19:23:55,383 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2064 transitions. [2021-02-19 19:23:55,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:23:55,385 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:55,385 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:55,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-02-19 19:23:55,598 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:55,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:55,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1430626809, now seen corresponding path program 12 times [2021-02-19 19:23:55,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:55,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537087709] [2021-02-19 19:23:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:55,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537087709] [2021-02-19 19:23:55,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678928149] [2021-02-19 19:23:55,635 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 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 [2021-02-19 19:23:55,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:23:55,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:55,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:23:55,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:55,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:55,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:23:55,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069929663] [2021-02-19 19:23:55,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:23:55,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:55,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:23:55,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:23:55,742 INFO L87 Difference]: Start difference. First operand 628 states and 2064 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) 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) [2021-02-19 19:23:56,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:56,254 INFO L93 Difference]: Finished difference Result 1916 states and 5637 transitions. [2021-02-19 19:23:56,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:23:56,255 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) 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 27 [2021-02-19 19:23:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:56,259 INFO L225 Difference]: With dead ends: 1916 [2021-02-19 19:23:56,259 INFO L226 Difference]: Without dead ends: 1916 [2021-02-19 19:23:56,260 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:23:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-02-19 19:23:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 645. [2021-02-19 19:23:56,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 645 states, 644 states have (on average 3.340062111801242) internal successors, (2151), 644 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:56,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 2151 transitions. [2021-02-19 19:23:56,282 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 2151 transitions. Word has length 27 [2021-02-19 19:23:56,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:56,282 INFO L480 AbstractCegarLoop]: Abstraction has 645 states and 2151 transitions. [2021-02-19 19:23:56,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) 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) [2021-02-19 19:23:56,282 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 2151 transitions. [2021-02-19 19:23:56,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:23:56,284 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:56,284 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:56,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-02-19 19:23:56,494 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:56,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:56,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1405517959, now seen corresponding path program 13 times [2021-02-19 19:23:56,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:56,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581326858] [2021-02-19 19:23:56,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:56,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581326858] [2021-02-19 19:23:56,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260947104] [2021-02-19 19:23:56,536 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 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 [2021-02-19 19:23:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:56,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:23:56,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:56,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:56,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:23:56,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369770247] [2021-02-19 19:23:56,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:23:56,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:56,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:23:56,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:23:56,670 INFO L87 Difference]: Start difference. First operand 645 states and 2151 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:57,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:57,176 INFO L93 Difference]: Finished difference Result 1888 states and 5563 transitions. [2021-02-19 19:23:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:23:57,176 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:23:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:57,180 INFO L225 Difference]: With dead ends: 1888 [2021-02-19 19:23:57,180 INFO L226 Difference]: Without dead ends: 1888 [2021-02-19 19:23:57,180 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:23:57,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2021-02-19 19:23:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 635. [2021-02-19 19:23:57,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 635 states, 634 states have (on average 3.326498422712934) internal successors, (2109), 634 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:57,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 2109 transitions. [2021-02-19 19:23:57,203 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 2109 transitions. Word has length 27 [2021-02-19 19:23:57,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:57,203 INFO L480 AbstractCegarLoop]: Abstraction has 635 states and 2109 transitions. [2021-02-19 19:23:57,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 2109 transitions. [2021-02-19 19:23:57,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:23:57,205 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:57,205 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:57,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:57,428 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:57,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:57,428 INFO L82 PathProgramCache]: Analyzing trace with hash 534822461, now seen corresponding path program 14 times [2021-02-19 19:23:57,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:57,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432407806] [2021-02-19 19:23:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:57,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432407806] [2021-02-19 19:23:57,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509745019] [2021-02-19 19:23:57,468 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:23:57,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:23:57,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:57,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:23:57,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:57,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:57,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:23:57,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224396035] [2021-02-19 19:23:57,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:23:57,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:57,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:23:57,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:23:57,593 INFO L87 Difference]: Start difference. First operand 635 states and 2109 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:57,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:57,764 INFO L93 Difference]: Finished difference Result 912 states and 2859 transitions. [2021-02-19 19:23:57,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:23:57,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:23:57,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:57,766 INFO L225 Difference]: With dead ends: 912 [2021-02-19 19:23:57,766 INFO L226 Difference]: Without dead ends: 902 [2021-02-19 19:23:57,766 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:23:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-02-19 19:23:57,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 639. [2021-02-19 19:23:57,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.29153605015674) internal successors, (2100), 638 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2100 transitions. [2021-02-19 19:23:57,780 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2100 transitions. Word has length 27 [2021-02-19 19:23:57,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:57,780 INFO L480 AbstractCegarLoop]: Abstraction has 639 states and 2100 transitions. [2021-02-19 19:23:57,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2100 transitions. [2021-02-19 19:23:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:23:57,782 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:57,782 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:57,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:57,998 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:57,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:57,998 INFO L82 PathProgramCache]: Analyzing trace with hash -654388623, now seen corresponding path program 15 times [2021-02-19 19:23:57,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:57,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546139796] [2021-02-19 19:23:57,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:58,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:58,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546139796] [2021-02-19 19:23:58,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622071141] [2021-02-19 19:23:58,041 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 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 [2021-02-19 19:23:58,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:23:58,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:58,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:23:58,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:58,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:58,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:23:58,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584727327] [2021-02-19 19:23:58,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:23:58,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:58,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:23:58,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:23:58,155 INFO L87 Difference]: Start difference. First operand 639 states and 2100 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) 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) [2021-02-19 19:23:58,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:58,574 INFO L93 Difference]: Finished difference Result 1623 states and 4845 transitions. [2021-02-19 19:23:58,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:23:58,575 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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 27 [2021-02-19 19:23:58,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:58,577 INFO L225 Difference]: With dead ends: 1623 [2021-02-19 19:23:58,577 INFO L226 Difference]: Without dead ends: 1615 [2021-02-19 19:23:58,578 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:23:58,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-02-19 19:23:58,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 657. [2021-02-19 19:23:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 656 states have (on average 3.285060975609756) internal successors, (2155), 656 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 2155 transitions. [2021-02-19 19:23:58,593 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 2155 transitions. Word has length 27 [2021-02-19 19:23:58,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:58,593 INFO L480 AbstractCegarLoop]: Abstraction has 657 states and 2155 transitions. [2021-02-19 19:23:58,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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) [2021-02-19 19:23:58,594 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 2155 transitions. [2021-02-19 19:23:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:23:58,595 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:58,595 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:58,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:58,816 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:58,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:58,817 INFO L82 PathProgramCache]: Analyzing trace with hash 324168821, now seen corresponding path program 16 times [2021-02-19 19:23:58,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:58,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72939851] [2021-02-19 19:23:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:58,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72939851] [2021-02-19 19:23:58,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334135644] [2021-02-19 19:23:58,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:23:58,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:23:58,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:58,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:23:58,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:58,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:58,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:58,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:23:58,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242645120] [2021-02-19 19:23:58,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:23:58,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:58,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:23:58,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:23:58,942 INFO L87 Difference]: Start difference. First operand 657 states and 2155 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) 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) [2021-02-19 19:23:59,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:23:59,473 INFO L93 Difference]: Finished difference Result 1707 states and 5021 transitions. [2021-02-19 19:23:59,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 19:23:59,474 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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 27 [2021-02-19 19:23:59,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:23:59,477 INFO L225 Difference]: With dead ends: 1707 [2021-02-19 19:23:59,478 INFO L226 Difference]: Without dead ends: 1707 [2021-02-19 19:23:59,479 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:23:59,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-02-19 19:23:59,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 642. [2021-02-19 19:23:59,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 3.282371294851794) internal successors, (2104), 641 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:23:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2104 transitions. [2021-02-19 19:23:59,498 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2104 transitions. Word has length 27 [2021-02-19 19:23:59,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:23:59,498 INFO L480 AbstractCegarLoop]: Abstraction has 642 states and 2104 transitions. [2021-02-19 19:23:59,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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) [2021-02-19 19:23:59,498 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2104 transitions. [2021-02-19 19:23:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:23:59,500 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:23:59,500 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:23:59,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-02-19 19:23:59,722 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:23:59,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:23:59,722 INFO L82 PathProgramCache]: Analyzing trace with hash -30018951, now seen corresponding path program 17 times [2021-02-19 19:23:59,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:23:59,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695108476] [2021-02-19 19:23:59,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:23:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:23:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:59,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695108476] [2021-02-19 19:23:59,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702329172] [2021-02-19 19:23:59,769 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 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 [2021-02-19 19:23:59,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:23:59,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:23:59,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:23:59,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:23:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:23:59,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:23:59,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:23:59,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880854281] [2021-02-19 19:23:59,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:23:59,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:23:59,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:23:59,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:23:59,863 INFO L87 Difference]: Start difference. First operand 642 states and 2104 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:00,123 INFO L93 Difference]: Finished difference Result 1202 states and 3649 transitions. [2021-02-19 19:24:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:24:00,124 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:00,126 INFO L225 Difference]: With dead ends: 1202 [2021-02-19 19:24:00,126 INFO L226 Difference]: Without dead ends: 1190 [2021-02-19 19:24:00,126 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:24:00,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2021-02-19 19:24:00,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 664. [2021-02-19 19:24:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 3.2654600301659125) internal successors, (2165), 663 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:00,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 2165 transitions. [2021-02-19 19:24:00,142 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 2165 transitions. Word has length 27 [2021-02-19 19:24:00,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:00,142 INFO L480 AbstractCegarLoop]: Abstraction has 664 states and 2165 transitions. [2021-02-19 19:24:00,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:00,142 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 2165 transitions. [2021-02-19 19:24:00,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:00,143 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:00,143 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:00,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:00,358 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:00,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:00,359 INFO L82 PathProgramCache]: Analyzing trace with hash 891683189, now seen corresponding path program 18 times [2021-02-19 19:24:00,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:00,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212163296] [2021-02-19 19:24:00,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:00,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212163296] [2021-02-19 19:24:00,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978840049] [2021-02-19 19:24:00,406 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 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 [2021-02-19 19:24:00,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:24:00,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:00,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:00,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:00,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:00,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:24:00,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875264324] [2021-02-19 19:24:00,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:00,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:00,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:00,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:00,509 INFO L87 Difference]: Start difference. First operand 664 states and 2165 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:00,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:00,802 INFO L93 Difference]: Finished difference Result 1451 states and 4277 transitions. [2021-02-19 19:24:00,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 19:24:00,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:00,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:00,806 INFO L225 Difference]: With dead ends: 1451 [2021-02-19 19:24:00,806 INFO L226 Difference]: Without dead ends: 1443 [2021-02-19 19:24:00,806 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:24:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-02-19 19:24:00,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 703. [2021-02-19 19:24:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.274928774928775) internal successors, (2299), 702 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:00,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2299 transitions. [2021-02-19 19:24:00,825 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2299 transitions. Word has length 27 [2021-02-19 19:24:00,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:00,825 INFO L480 AbstractCegarLoop]: Abstraction has 703 states and 2299 transitions. [2021-02-19 19:24:00,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2299 transitions. [2021-02-19 19:24:00,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:00,826 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:00,826 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:01,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-02-19 19:24:01,042 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:01,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:01,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1870240633, now seen corresponding path program 19 times [2021-02-19 19:24:01,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:01,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694359279] [2021-02-19 19:24:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:01,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694359279] [2021-02-19 19:24:01,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533109765] [2021-02-19 19:24:01,080 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 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 [2021-02-19 19:24:01,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:01,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:01,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:01,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:01,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:24:01,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982214751] [2021-02-19 19:24:01,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:01,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:01,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:01,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:01,173 INFO L87 Difference]: Start difference. First operand 703 states and 2299 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:01,549 INFO L93 Difference]: Finished difference Result 1579 states and 4588 transitions. [2021-02-19 19:24:01,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 19:24:01,549 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:01,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:01,553 INFO L225 Difference]: With dead ends: 1579 [2021-02-19 19:24:01,553 INFO L226 Difference]: Without dead ends: 1579 [2021-02-19 19:24:01,553 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:24:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2021-02-19 19:24:01,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 697. [2021-02-19 19:24:01,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.281609195402299) internal successors, (2284), 696 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2284 transitions. [2021-02-19 19:24:01,572 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2284 transitions. Word has length 27 [2021-02-19 19:24:01,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:01,572 INFO L480 AbstractCegarLoop]: Abstraction has 697 states and 2284 transitions. [2021-02-19 19:24:01,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:01,572 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2284 transitions. [2021-02-19 19:24:01,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:01,574 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:01,574 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:01,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:01,790 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:01,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:01,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2112752357, now seen corresponding path program 20 times [2021-02-19 19:24:01,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:01,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015018553] [2021-02-19 19:24:01,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:01,829 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:01,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015018553] [2021-02-19 19:24:01,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972017909] [2021-02-19 19:24:01,830 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 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 [2021-02-19 19:24:01,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:01,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:01,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:01,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:01,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:01,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:24:01,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407213416] [2021-02-19 19:24:01,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:01,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:01,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:01,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:01,938 INFO L87 Difference]: Start difference. First operand 697 states and 2284 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-02-19 19:24:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:02,240 INFO L93 Difference]: Finished difference Result 1913 states and 5956 transitions. [2021-02-19 19:24:02,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:24:02,240 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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 27 [2021-02-19 19:24:02,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:02,243 INFO L225 Difference]: With dead ends: 1913 [2021-02-19 19:24:02,243 INFO L226 Difference]: Without dead ends: 1913 [2021-02-19 19:24:02,243 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:24:02,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-02-19 19:24:02,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 898. [2021-02-19 19:24:02,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.4247491638795986) internal successors, (3072), 897 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:02,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 3072 transitions. [2021-02-19 19:24:02,262 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 3072 transitions. Word has length 27 [2021-02-19 19:24:02,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:02,262 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 3072 transitions. [2021-02-19 19:24:02,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-02-19 19:24:02,262 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 3072 transitions. [2021-02-19 19:24:02,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:02,264 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:02,264 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:02,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-02-19 19:24:02,468 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:02,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:02,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1609808173, now seen corresponding path program 21 times [2021-02-19 19:24:02,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:02,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766140914] [2021-02-19 19:24:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:02,503 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:02,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766140914] [2021-02-19 19:24:02,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723282619] [2021-02-19 19:24:02,503 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 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 [2021-02-19 19:24:02,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:24:02,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:02,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:02,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:02,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:02,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:24:02,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894838679] [2021-02-19 19:24:02,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:02,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:02,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:02,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:02,628 INFO L87 Difference]: Start difference. First operand 898 states and 3072 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:02,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:02,977 INFO L93 Difference]: Finished difference Result 1741 states and 5401 transitions. [2021-02-19 19:24:02,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:24:02,978 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:02,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:02,981 INFO L225 Difference]: With dead ends: 1741 [2021-02-19 19:24:02,981 INFO L226 Difference]: Without dead ends: 1731 [2021-02-19 19:24:02,981 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:24:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-02-19 19:24:02,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 895. [2021-02-19 19:24:03,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.4004474272930647) internal successors, (3040), 894 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:03,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 3040 transitions. [2021-02-19 19:24:03,002 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 3040 transitions. Word has length 27 [2021-02-19 19:24:03,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:03,003 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 3040 transitions. [2021-02-19 19:24:03,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:03,003 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 3040 transitions. [2021-02-19 19:24:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:03,005 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:03,005 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:03,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:03,227 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:03,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:03,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1342795933, now seen corresponding path program 22 times [2021-02-19 19:24:03,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:03,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540071885] [2021-02-19 19:24:03,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:03,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:03,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540071885] [2021-02-19 19:24:03,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829857877] [2021-02-19 19:24:03,275 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 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 [2021-02-19 19:24:03,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:03,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:03,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:03,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:03,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:03,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:24:03,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102336330] [2021-02-19 19:24:03,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:03,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:03,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:03,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:03,399 INFO L87 Difference]: Start difference. First operand 895 states and 3040 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-02-19 19:24:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:03,725 INFO L93 Difference]: Finished difference Result 1821 states and 5773 transitions. [2021-02-19 19:24:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:24:03,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 27 [2021-02-19 19:24:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:03,727 INFO L225 Difference]: With dead ends: 1821 [2021-02-19 19:24:03,727 INFO L226 Difference]: Without dead ends: 1821 [2021-02-19 19:24:03,728 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:24:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-02-19 19:24:03,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 922. [2021-02-19 19:24:03,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.3832790445168297) internal successors, (3116), 921 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 3116 transitions. [2021-02-19 19:24:03,742 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 3116 transitions. Word has length 27 [2021-02-19 19:24:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:03,742 INFO L480 AbstractCegarLoop]: Abstraction has 922 states and 3116 transitions. [2021-02-19 19:24:03,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2021-02-19 19:24:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 3116 transitions. [2021-02-19 19:24:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:03,743 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:03,743 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:03,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-02-19 19:24:03,944 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:03,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:03,944 INFO L82 PathProgramCache]: Analyzing trace with hash -775758561, now seen corresponding path program 23 times [2021-02-19 19:24:03,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:03,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548022304] [2021-02-19 19:24:03,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:03,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:03,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548022304] [2021-02-19 19:24:03,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377365341] [2021-02-19 19:24:03,980 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 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 [2021-02-19 19:24:04,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:04,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:04,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:04,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:04,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:04,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-02-19 19:24:04,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787983099] [2021-02-19 19:24:04,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:04,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:04,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:04,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:04,106 INFO L87 Difference]: Start difference. First operand 922 states and 3116 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:04,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:04,286 INFO L93 Difference]: Finished difference Result 1342 states and 4285 transitions. [2021-02-19 19:24:04,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:24:04,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:04,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:04,288 INFO L225 Difference]: With dead ends: 1342 [2021-02-19 19:24:04,288 INFO L226 Difference]: Without dead ends: 1311 [2021-02-19 19:24:04,289 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:24:04,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-02-19 19:24:04,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 986. [2021-02-19 19:24:04,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 3.3573604060913707) internal successors, (3307), 985 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:04,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 3307 transitions. [2021-02-19 19:24:04,302 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 3307 transitions. Word has length 27 [2021-02-19 19:24:04,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:04,302 INFO L480 AbstractCegarLoop]: Abstraction has 986 states and 3307 transitions. [2021-02-19 19:24:04,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:04,303 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 3307 transitions. [2021-02-19 19:24:04,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:04,304 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:04,304 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:04,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-02-19 19:24:04,505 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:04,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:04,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1546134939, now seen corresponding path program 24 times [2021-02-19 19:24:04,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:04,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105836726] [2021-02-19 19:24:04,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:04,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105836726] [2021-02-19 19:24:04,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524006001] [2021-02-19 19:24:04,544 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 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 [2021-02-19 19:24:04,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:24:04,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:04,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:04,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:04,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:04,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:24:04,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357353956] [2021-02-19 19:24:04,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:04,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:04,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:04,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:04,630 INFO L87 Difference]: Start difference. First operand 986 states and 3307 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:04,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:04,990 INFO L93 Difference]: Finished difference Result 2119 states and 6592 transitions. [2021-02-19 19:24:04,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:24:04,991 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:04,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:04,994 INFO L225 Difference]: With dead ends: 2119 [2021-02-19 19:24:04,994 INFO L226 Difference]: Without dead ends: 2115 [2021-02-19 19:24:04,994 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:24:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-02-19 19:24:05,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1074. [2021-02-19 19:24:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.341099720410065) internal successors, (3585), 1073 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:05,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3585 transitions. [2021-02-19 19:24:05,011 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3585 transitions. Word has length 27 [2021-02-19 19:24:05,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:05,011 INFO L480 AbstractCegarLoop]: Abstraction has 1074 states and 3585 transitions. [2021-02-19 19:24:05,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:05,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3585 transitions. [2021-02-19 19:24:05,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:05,013 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:05,013 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:05,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-02-19 19:24:05,214 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:05,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:05,214 INFO L82 PathProgramCache]: Analyzing trace with hash -567577495, now seen corresponding path program 25 times [2021-02-19 19:24:05,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:05,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412683338] [2021-02-19 19:24:05,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:05,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412683338] [2021-02-19 19:24:05,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696419095] [2021-02-19 19:24:05,252 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:24:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:05,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:05,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:05,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:05,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:24:05,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475507591] [2021-02-19 19:24:05,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:05,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:05,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:05,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:05,357 INFO L87 Difference]: Start difference. First operand 1074 states and 3585 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:05,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:05,764 INFO L93 Difference]: Finished difference Result 2273 states and 6985 transitions. [2021-02-19 19:24:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 19:24:05,765 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:05,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:05,768 INFO L225 Difference]: With dead ends: 2273 [2021-02-19 19:24:05,769 INFO L226 Difference]: Without dead ends: 2273 [2021-02-19 19:24:05,769 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=292, Invalid=968, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:24:05,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-02-19 19:24:05,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1032. [2021-02-19 19:24:05,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 3.344325897187197) internal successors, (3448), 1031 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 3448 transitions. [2021-02-19 19:24:05,795 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 3448 transitions. Word has length 27 [2021-02-19 19:24:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:05,795 INFO L480 AbstractCegarLoop]: Abstraction has 1032 states and 3448 transitions. [2021-02-19 19:24:05,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:05,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 3448 transitions. [2021-02-19 19:24:05,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:05,797 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:05,797 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:06,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-02-19 19:24:06,013 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:06,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:06,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1646918205, now seen corresponding path program 26 times [2021-02-19 19:24:06,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:06,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421361017] [2021-02-19 19:24:06,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:06,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421361017] [2021-02-19 19:24:06,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374614238] [2021-02-19 19:24:06,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:06,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:06,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:06,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:06,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:06,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:06,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:06,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:24:06,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512316138] [2021-02-19 19:24:06,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:06,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:06,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:06,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:06,140 INFO L87 Difference]: Start difference. First operand 1032 states and 3448 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:06,424 INFO L93 Difference]: Finished difference Result 2014 states and 6277 transitions. [2021-02-19 19:24:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:24:06,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:06,427 INFO L225 Difference]: With dead ends: 2014 [2021-02-19 19:24:06,427 INFO L226 Difference]: Without dead ends: 2014 [2021-02-19 19:24:06,427 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:24:06,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2014 states. [2021-02-19 19:24:06,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2014 to 1044. [2021-02-19 19:24:06,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.340364333652924) internal successors, (3484), 1043 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:06,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3484 transitions. [2021-02-19 19:24:06,444 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3484 transitions. Word has length 27 [2021-02-19 19:24:06,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:06,444 INFO L480 AbstractCegarLoop]: Abstraction has 1044 states and 3484 transitions. [2021-02-19 19:24:06,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:06,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3484 transitions. [2021-02-19 19:24:06,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:06,446 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:06,446 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:06,646 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-02-19 19:24:06,646 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:06,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:06,647 INFO L82 PathProgramCache]: Analyzing trace with hash -869169675, now seen corresponding path program 27 times [2021-02-19 19:24:06,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:06,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771090632] [2021-02-19 19:24:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:06,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:06,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771090632] [2021-02-19 19:24:06,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069904312] [2021-02-19 19:24:06,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:06,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:24:06,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:06,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:06,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:06,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:06,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:06,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-02-19 19:24:06,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006337639] [2021-02-19 19:24:06,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:24:06,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:06,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:24:06,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:24:06,755 INFO L87 Difference]: Start difference. First operand 1044 states and 3484 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:06,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:06,982 INFO L93 Difference]: Finished difference Result 1776 states and 5488 transitions. [2021-02-19 19:24:06,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:24:06,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:06,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:06,985 INFO L225 Difference]: With dead ends: 1776 [2021-02-19 19:24:06,985 INFO L226 Difference]: Without dead ends: 1764 [2021-02-19 19:24:06,985 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:24:06,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2021-02-19 19:24:06,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1102. [2021-02-19 19:24:07,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 1101 states have (on average 3.321525885558583) internal successors, (3657), 1101 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 3657 transitions. [2021-02-19 19:24:07,004 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 3657 transitions. Word has length 27 [2021-02-19 19:24:07,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:07,004 INFO L480 AbstractCegarLoop]: Abstraction has 1102 states and 3657 transitions. [2021-02-19 19:24:07,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 3657 transitions. [2021-02-19 19:24:07,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:07,006 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:07,006 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:07,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-02-19 19:24:07,222 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:07,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:07,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1964463175, now seen corresponding path program 28 times [2021-02-19 19:24:07,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:07,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221705375] [2021-02-19 19:24:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:07,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221705375] [2021-02-19 19:24:07,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540356060] [2021-02-19 19:24:07,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:07,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:07,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:07,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:07,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:07,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:07,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-02-19 19:24:07,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037822267] [2021-02-19 19:24:07,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:24:07,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:07,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:24:07,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:24:07,337 INFO L87 Difference]: Start difference. First operand 1102 states and 3657 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:07,634 INFO L93 Difference]: Finished difference Result 1940 states and 5945 transitions. [2021-02-19 19:24:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:24:07,634 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:07,637 INFO L225 Difference]: With dead ends: 1940 [2021-02-19 19:24:07,637 INFO L226 Difference]: Without dead ends: 1940 [2021-02-19 19:24:07,637 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=516, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:24:07,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-02-19 19:24:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1158. [2021-02-19 19:24:07,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 1157 states have (on average 3.3094209161624892) internal successors, (3829), 1157 states have internal predecessors, (3829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:07,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 3829 transitions. [2021-02-19 19:24:07,655 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 3829 transitions. Word has length 27 [2021-02-19 19:24:07,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:07,655 INFO L480 AbstractCegarLoop]: Abstraction has 1158 states and 3829 transitions. [2021-02-19 19:24:07,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 3829 transitions. [2021-02-19 19:24:07,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:07,656 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:07,656 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:07,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-02-19 19:24:07,857 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:07,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:07,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1137942265, now seen corresponding path program 3 times [2021-02-19 19:24:07,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:07,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102030062] [2021-02-19 19:24:07,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:07,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:07,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102030062] [2021-02-19 19:24:07,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866850235] [2021-02-19 19:24:07,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:24:07,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:24:07,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:07,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:07,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:08,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:08,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:24:08,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009812] [2021-02-19 19:24:08,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:08,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:08,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:08,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:08,039 INFO L87 Difference]: Start difference. First operand 1158 states and 3829 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) 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) [2021-02-19 19:24:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:08,407 INFO L93 Difference]: Finished difference Result 1759 states and 5449 transitions. [2021-02-19 19:24:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 19:24:08,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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 27 [2021-02-19 19:24:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:08,411 INFO L225 Difference]: With dead ends: 1759 [2021-02-19 19:24:08,411 INFO L226 Difference]: Without dead ends: 1759 [2021-02-19 19:24:08,412 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:24:08,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2021-02-19 19:24:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1180. [2021-02-19 19:24:08,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 3.3078880407124682) internal successors, (3900), 1179 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:08,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3900 transitions. [2021-02-19 19:24:08,434 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3900 transitions. Word has length 27 [2021-02-19 19:24:08,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:08,435 INFO L480 AbstractCegarLoop]: Abstraction has 1180 states and 3900 transitions. [2021-02-19 19:24:08,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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) [2021-02-19 19:24:08,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3900 transitions. [2021-02-19 19:24:08,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:08,437 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:08,437 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:08,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:08,650 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:08,650 INFO L82 PathProgramCache]: Analyzing trace with hash 508323517, now seen corresponding path program 4 times [2021-02-19 19:24:08,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:08,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593567205] [2021-02-19 19:24:08,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:08,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593567205] [2021-02-19 19:24:08,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846032867] [2021-02-19 19:24:08,678 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 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 [2021-02-19 19:24:08,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:08,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:08,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:24:08,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:08,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:08,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:08,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 19:24:08,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889883741] [2021-02-19 19:24:08,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:24:08,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:08,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:24:08,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:24:08,764 INFO L87 Difference]: Start difference. First operand 1180 states and 3900 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:08,881 INFO L93 Difference]: Finished difference Result 1872 states and 5977 transitions. [2021-02-19 19:24:08,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 19:24:08,881 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:08,884 INFO L225 Difference]: With dead ends: 1872 [2021-02-19 19:24:08,884 INFO L226 Difference]: Without dead ends: 1854 [2021-02-19 19:24:08,884 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:24:08,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-02-19 19:24:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1389. [2021-02-19 19:24:08,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1388 states have (on average 3.3746397694524495) internal successors, (4684), 1388 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 4684 transitions. [2021-02-19 19:24:08,909 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 4684 transitions. Word has length 27 [2021-02-19 19:24:08,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:08,909 INFO L480 AbstractCegarLoop]: Abstraction has 1389 states and 4684 transitions. [2021-02-19 19:24:08,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:08,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 4684 transitions. [2021-02-19 19:24:08,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:08,911 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:08,911 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:09,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-02-19 19:24:09,113 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:09,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:09,113 INFO L82 PathProgramCache]: Analyzing trace with hash -250644575, now seen corresponding path program 5 times [2021-02-19 19:24:09,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:09,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817453327] [2021-02-19 19:24:09,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:09,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817453327] [2021-02-19 19:24:09,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275354794] [2021-02-19 19:24:09,149 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 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 [2021-02-19 19:24:09,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:24:09,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:09,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:24:09,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:09,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:09,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-02-19 19:24:09,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516895745] [2021-02-19 19:24:09,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:24:09,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:09,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:24:09,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:24:09,234 INFO L87 Difference]: Start difference. First operand 1389 states and 4684 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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) [2021-02-19 19:24:09,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:09,386 INFO L93 Difference]: Finished difference Result 2133 states and 6693 transitions. [2021-02-19 19:24:09,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 19:24:09,386 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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 27 [2021-02-19 19:24:09,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:09,389 INFO L225 Difference]: With dead ends: 2133 [2021-02-19 19:24:09,389 INFO L226 Difference]: Without dead ends: 2133 [2021-02-19 19:24:09,389 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:24:09,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-02-19 19:24:09,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1392. [2021-02-19 19:24:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.3608914450035945) internal successors, (4675), 1391 states have internal predecessors, (4675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4675 transitions. [2021-02-19 19:24:09,418 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4675 transitions. Word has length 27 [2021-02-19 19:24:09,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:09,418 INFO L480 AbstractCegarLoop]: Abstraction has 1392 states and 4675 transitions. [2021-02-19 19:24:09,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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) [2021-02-19 19:24:09,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4675 transitions. [2021-02-19 19:24:09,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:09,421 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:09,421 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:09,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:09,642 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:09,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:09,642 INFO L82 PathProgramCache]: Analyzing trace with hash -109125839, now seen corresponding path program 6 times [2021-02-19 19:24:09,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:09,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676589478] [2021-02-19 19:24:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:09,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676589478] [2021-02-19 19:24:09,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967897134] [2021-02-19 19:24:09,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:09,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:24:09,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:09,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:09,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:09,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:09,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-02-19 19:24:09,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159207677] [2021-02-19 19:24:09,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:09,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:09,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:09,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:09,781 INFO L87 Difference]: Start difference. First operand 1392 states and 4675 transitions. Second operand has 12 states, 12 states have (on average 3.5) 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) [2021-02-19 19:24:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:10,015 INFO L93 Difference]: Finished difference Result 2050 states and 6469 transitions. [2021-02-19 19:24:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:24:10,016 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) 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 27 [2021-02-19 19:24:10,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:10,018 INFO L225 Difference]: With dead ends: 2050 [2021-02-19 19:24:10,019 INFO L226 Difference]: Without dead ends: 2046 [2021-02-19 19:24:10,019 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:24:10,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-02-19 19:24:10,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1392. [2021-02-19 19:24:10,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 3.359453630481668) internal successors, (4673), 1391 states have internal predecessors, (4673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:10,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4673 transitions. [2021-02-19 19:24:10,043 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4673 transitions. Word has length 27 [2021-02-19 19:24:10,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:10,043 INFO L480 AbstractCegarLoop]: Abstraction has 1392 states and 4673 transitions. [2021-02-19 19:24:10,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) 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) [2021-02-19 19:24:10,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4673 transitions. [2021-02-19 19:24:10,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:10,045 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:10,045 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:10,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:10,265 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:10,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:10,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1339125881, now seen corresponding path program 7 times [2021-02-19 19:24:10,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:10,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405618613] [2021-02-19 19:24:10,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:10,301 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:10,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405618613] [2021-02-19 19:24:10,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874865186] [2021-02-19 19:24:10,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:10,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:10,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:10,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:10,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:10,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-02-19 19:24:10,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206386389] [2021-02-19 19:24:10,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:10,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:10,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:10,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:10,395 INFO L87 Difference]: Start difference. First operand 1392 states and 4673 transitions. Second operand has 12 states, 12 states have (on average 3.5) 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) [2021-02-19 19:24:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:10,676 INFO L93 Difference]: Finished difference Result 2257 states and 7002 transitions. [2021-02-19 19:24:10,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:24:10,677 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) 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 27 [2021-02-19 19:24:10,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:10,680 INFO L225 Difference]: With dead ends: 2257 [2021-02-19 19:24:10,680 INFO L226 Difference]: Without dead ends: 2257 [2021-02-19 19:24:10,680 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:24:10,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-02-19 19:24:10,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1442. [2021-02-19 19:24:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.3587786259541983) internal successors, (4840), 1441 states have internal predecessors, (4840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4840 transitions. [2021-02-19 19:24:10,712 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4840 transitions. Word has length 27 [2021-02-19 19:24:10,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:10,712 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 4840 transitions. [2021-02-19 19:24:10,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) 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) [2021-02-19 19:24:10,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4840 transitions. [2021-02-19 19:24:10,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:10,714 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:10,714 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:10,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:10,914 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:10,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:10,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1633593027, now seen corresponding path program 8 times [2021-02-19 19:24:10,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:10,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438191030] [2021-02-19 19:24:10,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:10,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:10,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438191030] [2021-02-19 19:24:10,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453360491] [2021-02-19 19:24:10,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:10,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:10,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:10,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:24:10,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:11,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:11,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-02-19 19:24:11,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937964218] [2021-02-19 19:24:11,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:24:11,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:11,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:24:11,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:24:11,026 INFO L87 Difference]: Start difference. First operand 1442 states and 4840 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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) [2021-02-19 19:24:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:11,174 INFO L93 Difference]: Finished difference Result 2263 states and 7241 transitions. [2021-02-19 19:24:11,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 19:24:11,174 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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 27 [2021-02-19 19:24:11,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:11,178 INFO L225 Difference]: With dead ends: 2263 [2021-02-19 19:24:11,178 INFO L226 Difference]: Without dead ends: 2257 [2021-02-19 19:24:11,178 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:24:11,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-02-19 19:24:11,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 1535. [2021-02-19 19:24:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.3872229465449806) internal successors, (5196), 1534 states have internal predecessors, (5196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5196 transitions. [2021-02-19 19:24:11,207 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5196 transitions. Word has length 27 [2021-02-19 19:24:11,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:11,208 INFO L480 AbstractCegarLoop]: Abstraction has 1535 states and 5196 transitions. [2021-02-19 19:24:11,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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) [2021-02-19 19:24:11,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5196 transitions. [2021-02-19 19:24:11,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:11,211 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:11,211 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:11,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:11,426 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:11,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:11,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1930068581, now seen corresponding path program 9 times [2021-02-19 19:24:11,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:11,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595156744] [2021-02-19 19:24:11,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:11,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:11,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595156744] [2021-02-19 19:24:11,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337154780] [2021-02-19 19:24:11,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:11,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:24:11,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:11,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:24:11,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:11,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:11,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-02-19 19:24:11,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739064066] [2021-02-19 19:24:11,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:24:11,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:11,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:24:11,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:24:11,540 INFO L87 Difference]: Start difference. First operand 1535 states and 5196 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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) [2021-02-19 19:24:11,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:11,689 INFO L93 Difference]: Finished difference Result 2415 states and 7685 transitions. [2021-02-19 19:24:11,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:24:11,689 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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 27 [2021-02-19 19:24:11,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:11,692 INFO L225 Difference]: With dead ends: 2415 [2021-02-19 19:24:11,693 INFO L226 Difference]: Without dead ends: 2415 [2021-02-19 19:24:11,694 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:24:11,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-02-19 19:24:11,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1459. [2021-02-19 19:24:11,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 3.347736625514403) internal successors, (4881), 1458 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:11,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 4881 transitions. [2021-02-19 19:24:11,722 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 4881 transitions. Word has length 27 [2021-02-19 19:24:11,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:11,722 INFO L480 AbstractCegarLoop]: Abstraction has 1459 states and 4881 transitions. [2021-02-19 19:24:11,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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) [2021-02-19 19:24:11,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 4881 transitions. [2021-02-19 19:24:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:11,724 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:11,724 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:11,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-02-19 19:24:11,924 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:11,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:11,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2071587317, now seen corresponding path program 10 times [2021-02-19 19:24:11,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:11,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225982557] [2021-02-19 19:24:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:11,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225982557] [2021-02-19 19:24:11,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513554632] [2021-02-19 19:24:11,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:11,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:11,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:11,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:11,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:12,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:12,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-02-19 19:24:12,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329073906] [2021-02-19 19:24:12,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:12,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:12,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:12,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:12,049 INFO L87 Difference]: Start difference. First operand 1459 states and 4881 transitions. Second operand has 12 states, 12 states have (on average 3.5) 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) [2021-02-19 19:24:12,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:12,288 INFO L93 Difference]: Finished difference Result 2204 states and 6862 transitions. [2021-02-19 19:24:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:24:12,289 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) 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 27 [2021-02-19 19:24:12,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:12,291 INFO L225 Difference]: With dead ends: 2204 [2021-02-19 19:24:12,291 INFO L226 Difference]: Without dead ends: 2200 [2021-02-19 19:24:12,292 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:24:12,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2021-02-19 19:24:12,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 1419. [2021-02-19 19:24:12,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1419 states, 1418 states have (on average 3.349083215796897) internal successors, (4749), 1418 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:12,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 4749 transitions. [2021-02-19 19:24:12,312 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 4749 transitions. Word has length 27 [2021-02-19 19:24:12,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:12,312 INFO L480 AbstractCegarLoop]: Abstraction has 1419 states and 4749 transitions. [2021-02-19 19:24:12,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) 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) [2021-02-19 19:24:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 4749 transitions. [2021-02-19 19:24:12,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:12,315 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:12,315 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:12,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-02-19 19:24:12,515 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:12,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:12,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1487169441, now seen corresponding path program 11 times [2021-02-19 19:24:12,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:12,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117054228] [2021-02-19 19:24:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:12,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117054228] [2021-02-19 19:24:12,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630858458] [2021-02-19 19:24:12,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:12,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:24:12,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:12,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:24:12,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:12,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:12,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-02-19 19:24:12,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472903997] [2021-02-19 19:24:12,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:24:12,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:12,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:24:12,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:24:12,666 INFO L87 Difference]: Start difference. First operand 1419 states and 4749 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 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) [2021-02-19 19:24:12,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:12,813 INFO L93 Difference]: Finished difference Result 2022 states and 6496 transitions. [2021-02-19 19:24:12,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:24:12,814 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 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 27 [2021-02-19 19:24:12,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:12,816 INFO L225 Difference]: With dead ends: 2022 [2021-02-19 19:24:12,816 INFO L226 Difference]: Without dead ends: 2022 [2021-02-19 19:24:12,816 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:24:12,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-02-19 19:24:12,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1518. [2021-02-19 19:24:12,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.3698088332234675) internal successors, (5112), 1517 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:12,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5112 transitions. [2021-02-19 19:24:12,841 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5112 transitions. Word has length 27 [2021-02-19 19:24:12,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:12,841 INFO L480 AbstractCegarLoop]: Abstraction has 1518 states and 5112 transitions. [2021-02-19 19:24:12,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 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) [2021-02-19 19:24:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5112 transitions. [2021-02-19 19:24:12,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:12,844 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:12,844 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:13,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-02-19 19:24:13,061 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:13,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:13,061 INFO L82 PathProgramCache]: Analyzing trace with hash -152499719, now seen corresponding path program 12 times [2021-02-19 19:24:13,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:13,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156190986] [2021-02-19 19:24:13,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:13,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156190986] [2021-02-19 19:24:13,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916298629] [2021-02-19 19:24:13,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:13,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:24:13,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:13,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:13,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:13,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:13,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:24:13,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269459859] [2021-02-19 19:24:13,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:13,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:13,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:13,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:13,205 INFO L87 Difference]: Start difference. First operand 1518 states and 5112 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:13,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:13,450 INFO L93 Difference]: Finished difference Result 2124 states and 6748 transitions. [2021-02-19 19:24:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:24:13,450 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:13,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:13,454 INFO L225 Difference]: With dead ends: 2124 [2021-02-19 19:24:13,454 INFO L226 Difference]: Without dead ends: 2112 [2021-02-19 19:24:13,454 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:24:13,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-02-19 19:24:13,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1536. [2021-02-19 19:24:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 3.3674267100977198) internal successors, (5169), 1535 states have internal predecessors, (5169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 5169 transitions. [2021-02-19 19:24:13,476 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 5169 transitions. Word has length 27 [2021-02-19 19:24:13,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:13,476 INFO L480 AbstractCegarLoop]: Abstraction has 1536 states and 5169 transitions. [2021-02-19 19:24:13,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:13,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 5169 transitions. [2021-02-19 19:24:13,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:13,478 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:13,478 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:13,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-02-19 19:24:13,679 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:13,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:13,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1039358219, now seen corresponding path program 4 times [2021-02-19 19:24:13,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:13,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349571449] [2021-02-19 19:24:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:13,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349571449] [2021-02-19 19:24:13,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612965085] [2021-02-19 19:24:13,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:13,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:13,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:13,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:24:13,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:13,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:13,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 19:24:13,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524800548] [2021-02-19 19:24:13,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:13,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:13,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:13,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:13,829 INFO L87 Difference]: Start difference. First operand 1536 states and 5169 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) 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) [2021-02-19 19:24:14,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:14,105 INFO L93 Difference]: Finished difference Result 2332 states and 7312 transitions. [2021-02-19 19:24:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:24:14,106 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) 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 27 [2021-02-19 19:24:14,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:14,108 INFO L225 Difference]: With dead ends: 2332 [2021-02-19 19:24:14,108 INFO L226 Difference]: Without dead ends: 2320 [2021-02-19 19:24:14,109 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:24:14,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-02-19 19:24:14,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1566. [2021-02-19 19:24:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 3.375079872204473) internal successors, (5282), 1565 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:14,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 5282 transitions. [2021-02-19 19:24:14,136 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 5282 transitions. Word has length 27 [2021-02-19 19:24:14,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:14,136 INFO L480 AbstractCegarLoop]: Abstraction has 1566 states and 5282 transitions. [2021-02-19 19:24:14,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) 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) [2021-02-19 19:24:14,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 5282 transitions. [2021-02-19 19:24:14,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:14,139 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:14,139 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:14,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-02-19 19:24:14,354 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:14,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:14,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1770663907, now seen corresponding path program 5 times [2021-02-19 19:24:14,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:14,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238877728] [2021-02-19 19:24:14,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:14,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238877728] [2021-02-19 19:24:14,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517089231] [2021-02-19 19:24:14,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:14,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:24:14,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:14,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:24:14,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:14,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:14,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 19:24:14,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693230887] [2021-02-19 19:24:14,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:14,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:14,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:14,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:14,515 INFO L87 Difference]: Start difference. First operand 1566 states and 5282 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) 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) [2021-02-19 19:24:14,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:14,798 INFO L93 Difference]: Finished difference Result 2490 states and 7823 transitions. [2021-02-19 19:24:14,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 19:24:14,799 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) 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 27 [2021-02-19 19:24:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:14,801 INFO L225 Difference]: With dead ends: 2490 [2021-02-19 19:24:14,801 INFO L226 Difference]: Without dead ends: 2490 [2021-02-19 19:24:14,802 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:24:14,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-02-19 19:24:14,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 1435. [2021-02-19 19:24:14,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 3.311715481171548) internal successors, (4749), 1434 states have internal predecessors, (4749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:14,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4749 transitions. [2021-02-19 19:24:14,823 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4749 transitions. Word has length 27 [2021-02-19 19:24:14,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:14,823 INFO L480 AbstractCegarLoop]: Abstraction has 1435 states and 4749 transitions. [2021-02-19 19:24:14,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) 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) [2021-02-19 19:24:14,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4749 transitions. [2021-02-19 19:24:14,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:14,825 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:14,825 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:15,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-02-19 19:24:15,026 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:15,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:15,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1441517557, now seen corresponding path program 13 times [2021-02-19 19:24:15,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:15,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91515915] [2021-02-19 19:24:15,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:15,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91515915] [2021-02-19 19:24:15,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754906187] [2021-02-19 19:24:15,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:15,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:15,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:15,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:15,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:24:15,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554851177] [2021-02-19 19:24:15,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:15,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:15,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:15,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:15,156 INFO L87 Difference]: Start difference. First operand 1435 states and 4749 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) 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) [2021-02-19 19:24:15,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:15,462 INFO L93 Difference]: Finished difference Result 2497 states and 7799 transitions. [2021-02-19 19:24:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 19:24:15,462 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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 27 [2021-02-19 19:24:15,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:15,465 INFO L225 Difference]: With dead ends: 2497 [2021-02-19 19:24:15,466 INFO L226 Difference]: Without dead ends: 2497 [2021-02-19 19:24:15,466 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:24:15,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-02-19 19:24:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1477. [2021-02-19 19:24:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 3.2981029810298104) internal successors, (4868), 1476 states have internal predecessors, (4868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 4868 transitions. [2021-02-19 19:24:15,488 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 4868 transitions. Word has length 27 [2021-02-19 19:24:15,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:15,488 INFO L480 AbstractCegarLoop]: Abstraction has 1477 states and 4868 transitions. [2021-02-19 19:24:15,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) 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) [2021-02-19 19:24:15,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 4868 transitions. [2021-02-19 19:24:15,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:15,491 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:15,491 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:15,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:15,706 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:15,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:15,706 INFO L82 PathProgramCache]: Analyzing trace with hash -538011983, now seen corresponding path program 14 times [2021-02-19 19:24:15,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:15,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184727243] [2021-02-19 19:24:15,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:15,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184727243] [2021-02-19 19:24:15,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040180578] [2021-02-19 19:24:15,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:24:15,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:15,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:15,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:15,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:15,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:15,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:15,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:24:15,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261116777] [2021-02-19 19:24:15,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:15,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:15,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:15,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:15,883 INFO L87 Difference]: Start difference. First operand 1477 states and 4868 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-02-19 19:24:16,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:16,500 INFO L93 Difference]: Finished difference Result 2724 states and 8387 transitions. [2021-02-19 19:24:16,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:24:16,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) 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 27 [2021-02-19 19:24:16,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:16,504 INFO L225 Difference]: With dead ends: 2724 [2021-02-19 19:24:16,504 INFO L226 Difference]: Without dead ends: 2724 [2021-02-19 19:24:16,504 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=412, Invalid=1394, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:24:16,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2021-02-19 19:24:16,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1533. [2021-02-19 19:24:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1533 states, 1532 states have (on average 3.3015665796344646) internal successors, (5058), 1532 states have internal predecessors, (5058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 5058 transitions. [2021-02-19 19:24:16,528 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 5058 transitions. Word has length 27 [2021-02-19 19:24:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:16,528 INFO L480 AbstractCegarLoop]: Abstraction has 1533 states and 5058 transitions. [2021-02-19 19:24:16,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-02-19 19:24:16,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 5058 transitions. [2021-02-19 19:24:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:16,530 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:16,530 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:16,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-02-19 19:24:16,731 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:16,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:16,731 INFO L82 PathProgramCache]: Analyzing trace with hash 194449453, now seen corresponding path program 15 times [2021-02-19 19:24:16,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:16,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328312091] [2021-02-19 19:24:16,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:16,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328312091] [2021-02-19 19:24:16,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66268606] [2021-02-19 19:24:16,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:16,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 19:24:16,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:16,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:16,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:16,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:24:16,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157430557] [2021-02-19 19:24:16,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:16,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:16,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:16,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:16,915 INFO L87 Difference]: Start difference. First operand 1533 states and 5058 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-02-19 19:24:17,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:17,331 INFO L93 Difference]: Finished difference Result 2582 states and 8017 transitions. [2021-02-19 19:24:17,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:24:17,332 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) 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 27 [2021-02-19 19:24:17,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:17,336 INFO L225 Difference]: With dead ends: 2582 [2021-02-19 19:24:17,337 INFO L226 Difference]: Without dead ends: 2578 [2021-02-19 19:24:17,337 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=295, Invalid=895, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:24:17,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2578 states. [2021-02-19 19:24:17,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2578 to 1487. [2021-02-19 19:24:17,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.2994616419919245) internal successors, (4903), 1486 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4903 transitions. [2021-02-19 19:24:17,365 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4903 transitions. Word has length 27 [2021-02-19 19:24:17,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:17,365 INFO L480 AbstractCegarLoop]: Abstraction has 1487 states and 4903 transitions. [2021-02-19 19:24:17,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-02-19 19:24:17,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4903 transitions. [2021-02-19 19:24:17,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:17,367 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:17,367 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:17,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:17,568 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:17,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:17,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1457862663, now seen corresponding path program 16 times [2021-02-19 19:24:17,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:17,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303450295] [2021-02-19 19:24:17,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:17,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:17,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303450295] [2021-02-19 19:24:17,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572119286] [2021-02-19 19:24:17,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:24:17,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:17,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:17,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:17,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:17,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:17,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:24:17,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631279005] [2021-02-19 19:24:17,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:17,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:17,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:17,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:17,716 INFO L87 Difference]: Start difference. First operand 1487 states and 4903 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:18,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:18,085 INFO L93 Difference]: Finished difference Result 2411 states and 7586 transitions. [2021-02-19 19:24:18,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 19:24:18,086 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:18,088 INFO L225 Difference]: With dead ends: 2411 [2021-02-19 19:24:18,089 INFO L226 Difference]: Without dead ends: 2411 [2021-02-19 19:24:18,089 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:24:18,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2411 states. [2021-02-19 19:24:18,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2411 to 1471. [2021-02-19 19:24:18,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 3.3081632653061224) internal successors, (4863), 1470 states have internal predecessors, (4863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:18,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 4863 transitions. [2021-02-19 19:24:18,120 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 4863 transitions. Word has length 27 [2021-02-19 19:24:18,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:18,120 INFO L480 AbstractCegarLoop]: Abstraction has 1471 states and 4863 transitions. [2021-02-19 19:24:18,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:18,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 4863 transitions. [2021-02-19 19:24:18,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:18,122 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:18,122 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:18,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:18,323 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:18,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:18,323 INFO L82 PathProgramCache]: Analyzing trace with hash 962585405, now seen corresponding path program 6 times [2021-02-19 19:24:18,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:18,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421996392] [2021-02-19 19:24:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:18,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421996392] [2021-02-19 19:24:18,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662253947] [2021-02-19 19:24:18,351 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 [2021-02-19 19:24:18,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 19:24:18,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:18,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:24:18,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:18,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:18,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 19:24:18,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696592523] [2021-02-19 19:24:18,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:18,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:18,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:18,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:18,438 INFO L87 Difference]: Start difference. First operand 1471 states and 4863 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:18,661 INFO L93 Difference]: Finished difference Result 1987 states and 6138 transitions. [2021-02-19 19:24:18,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:24:18,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:18,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:18,664 INFO L225 Difference]: With dead ends: 1987 [2021-02-19 19:24:18,664 INFO L226 Difference]: Without dead ends: 1975 [2021-02-19 19:24:18,664 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:24:18,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-02-19 19:24:18,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1462. [2021-02-19 19:24:18,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.308008213552361) internal successors, (4833), 1461 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:18,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 4833 transitions. [2021-02-19 19:24:18,686 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 4833 transitions. Word has length 27 [2021-02-19 19:24:18,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:18,687 INFO L480 AbstractCegarLoop]: Abstraction has 1462 states and 4833 transitions. [2021-02-19 19:24:18,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:18,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 4833 transitions. [2021-02-19 19:24:18,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:18,690 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:18,690 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:18,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:18,890 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:18,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:18,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1379975435, now seen corresponding path program 7 times [2021-02-19 19:24:18,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:18,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88735272] [2021-02-19 19:24:18,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:18,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88735272] [2021-02-19 19:24:18,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911561027] [2021-02-19 19:24:18,923 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 [2021-02-19 19:24:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:18,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:24:18,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:19,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:19,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 19:24:19,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065243391] [2021-02-19 19:24:19,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:19,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:19,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:19,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:19,040 INFO L87 Difference]: Start difference. First operand 1462 states and 4833 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:19,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:19,270 INFO L93 Difference]: Finished difference Result 1951 states and 6027 transitions. [2021-02-19 19:24:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:24:19,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:19,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:19,272 INFO L225 Difference]: With dead ends: 1951 [2021-02-19 19:24:19,272 INFO L226 Difference]: Without dead ends: 1923 [2021-02-19 19:24:19,273 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:24:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2021-02-19 19:24:19,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1463. [2021-02-19 19:24:19,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 3.3071135430916554) internal successors, (4835), 1462 states have internal predecessors, (4835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4835 transitions. [2021-02-19 19:24:19,293 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4835 transitions. Word has length 27 [2021-02-19 19:24:19,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:19,293 INFO L480 AbstractCegarLoop]: Abstraction has 1463 states and 4835 transitions. [2021-02-19 19:24:19,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:19,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4835 transitions. [2021-02-19 19:24:19,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:19,296 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:19,296 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:19,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:19,510 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:19,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:19,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1554854629, now seen corresponding path program 8 times [2021-02-19 19:24:19,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:19,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098433467] [2021-02-19 19:24:19,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:19,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:19,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098433467] [2021-02-19 19:24:19,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713742413] [2021-02-19 19:24:19,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:24:19,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:19,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:19,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:24:19,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:19,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:19,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:19,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 19:24:19,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208949239] [2021-02-19 19:24:19,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:24:19,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:19,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:24:19,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:24:19,642 INFO L87 Difference]: Start difference. First operand 1463 states and 4835 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:19,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:19,861 INFO L93 Difference]: Finished difference Result 2417 states and 7513 transitions. [2021-02-19 19:24:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:24:19,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:19,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:19,864 INFO L225 Difference]: With dead ends: 2417 [2021-02-19 19:24:19,864 INFO L226 Difference]: Without dead ends: 2417 [2021-02-19 19:24:19,865 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:19,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-02-19 19:24:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1487. [2021-02-19 19:24:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.3250336473755047) internal successors, (4941), 1486 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:19,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4941 transitions. [2021-02-19 19:24:19,890 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4941 transitions. Word has length 27 [2021-02-19 19:24:19,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:19,890 INFO L480 AbstractCegarLoop]: Abstraction has 1487 states and 4941 transitions. [2021-02-19 19:24:19,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:19,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4941 transitions. [2021-02-19 19:24:19,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:19,893 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:19,893 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:20,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-02-19 19:24:20,093 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:20,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:20,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1151513187, now seen corresponding path program 9 times [2021-02-19 19:24:20,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:20,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894114761] [2021-02-19 19:24:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:20,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894114761] [2021-02-19 19:24:20,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260974557] [2021-02-19 19:24:20,138 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) [2021-02-19 19:24:20,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 19:24:20,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:20,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:24:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:20,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:20,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 19:24:20,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644021291] [2021-02-19 19:24:20,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:24:20,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:20,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:24:20,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:24:20,254 INFO L87 Difference]: Start difference. First operand 1487 states and 4941 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:20,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:20,459 INFO L93 Difference]: Finished difference Result 2191 states and 6835 transitions. [2021-02-19 19:24:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:24:20,459 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:20,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:20,462 INFO L225 Difference]: With dead ends: 2191 [2021-02-19 19:24:20,462 INFO L226 Difference]: Without dead ends: 2170 [2021-02-19 19:24:20,462 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:24:20,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-02-19 19:24:20,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1487. [2021-02-19 19:24:20,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1487 states, 1486 states have (on average 3.319650067294751) internal successors, (4933), 1486 states have internal predecessors, (4933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:20,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1487 states to 1487 states and 4933 transitions. [2021-02-19 19:24:20,482 INFO L78 Accepts]: Start accepts. Automaton has 1487 states and 4933 transitions. Word has length 27 [2021-02-19 19:24:20,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:20,483 INFO L480 AbstractCegarLoop]: Abstraction has 1487 states and 4933 transitions. [2021-02-19 19:24:20,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:20,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1487 states and 4933 transitions. [2021-02-19 19:24:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:20,485 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:20,485 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:20,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:20,685 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:20,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:20,686 INFO L82 PathProgramCache]: Analyzing trace with hash 802170457, now seen corresponding path program 10 times [2021-02-19 19:24:20,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:20,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553827660] [2021-02-19 19:24:20,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:20,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553827660] [2021-02-19 19:24:20,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870423517] [2021-02-19 19:24:20,720 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 [2021-02-19 19:24:20,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:20,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:20,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:24:20,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:20,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:20,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-02-19 19:24:20,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550050186] [2021-02-19 19:24:20,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:20,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:20,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:20,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:20,806 INFO L87 Difference]: Start difference. First operand 1487 states and 4933 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) 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) [2021-02-19 19:24:20,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:20,982 INFO L93 Difference]: Finished difference Result 1790 states and 5786 transitions. [2021-02-19 19:24:20,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:24:20,982 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) 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 27 [2021-02-19 19:24:20,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:20,985 INFO L225 Difference]: With dead ends: 1790 [2021-02-19 19:24:20,985 INFO L226 Difference]: Without dead ends: 1790 [2021-02-19 19:24:20,985 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:24:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-02-19 19:24:21,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1467. [2021-02-19 19:24:21,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1467 states, 1466 states have (on average 3.319918144611187) internal successors, (4867), 1466 states have internal predecessors, (4867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:21,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1467 states to 1467 states and 4867 transitions. [2021-02-19 19:24:21,026 INFO L78 Accepts]: Start accepts. Automaton has 1467 states and 4867 transitions. Word has length 27 [2021-02-19 19:24:21,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:21,027 INFO L480 AbstractCegarLoop]: Abstraction has 1467 states and 4867 transitions. [2021-02-19 19:24:21,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) 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) [2021-02-19 19:24:21,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1467 states and 4867 transitions. [2021-02-19 19:24:21,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:21,029 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:21,029 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:21,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-02-19 19:24:21,229 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:21,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:21,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1813649953, now seen corresponding path program 11 times [2021-02-19 19:24:21,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:21,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15432706] [2021-02-19 19:24:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:21,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15432706] [2021-02-19 19:24:21,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839644240] [2021-02-19 19:24:21,261 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 [2021-02-19 19:24:21,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:24:21,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:21,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:24:21,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:21,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:21,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 19:24:21,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922229954] [2021-02-19 19:24:21,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:24:21,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:21,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:24:21,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:24:21,339 INFO L87 Difference]: Start difference. First operand 1467 states and 4867 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:21,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:21,524 INFO L93 Difference]: Finished difference Result 2556 states and 8173 transitions. [2021-02-19 19:24:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 19:24:21,525 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:21,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:21,528 INFO L225 Difference]: With dead ends: 2556 [2021-02-19 19:24:21,528 INFO L226 Difference]: Without dead ends: 2556 [2021-02-19 19:24:21,528 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:24:21,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-02-19 19:24:21,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1719. [2021-02-19 19:24:21,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 3.3963911525029102) internal successors, (5835), 1718 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:21,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5835 transitions. [2021-02-19 19:24:21,564 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5835 transitions. Word has length 27 [2021-02-19 19:24:21,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:21,564 INFO L480 AbstractCegarLoop]: Abstraction has 1719 states and 5835 transitions. [2021-02-19 19:24:21,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:21,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5835 transitions. [2021-02-19 19:24:21,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:21,567 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:21,567 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:21,786 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:21,786 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:21,786 INFO L82 PathProgramCache]: Analyzing trace with hash -892717863, now seen corresponding path program 12 times [2021-02-19 19:24:21,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:21,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652260907] [2021-02-19 19:24:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:21,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652260907] [2021-02-19 19:24:21,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730926142] [2021-02-19 19:24:21,816 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 [2021-02-19 19:24:21,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 19:24:21,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:21,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 19:24:21,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:21,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:21,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 19:24:21,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157615385] [2021-02-19 19:24:21,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 19:24:21,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:21,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 19:24:21,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-02-19 19:24:21,889 INFO L87 Difference]: Start difference. First operand 1719 states and 5835 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:22,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:22,086 INFO L93 Difference]: Finished difference Result 2232 states and 7209 transitions. [2021-02-19 19:24:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-19 19:24:22,087 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:22,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:22,090 INFO L225 Difference]: With dead ends: 2232 [2021-02-19 19:24:22,090 INFO L226 Difference]: Without dead ends: 2211 [2021-02-19 19:24:22,090 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-02-19 19:24:22,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-02-19 19:24:22,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1686. [2021-02-19 19:24:22,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.399406528189911) internal successors, (5728), 1685 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5728 transitions. [2021-02-19 19:24:22,120 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5728 transitions. Word has length 27 [2021-02-19 19:24:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:22,120 INFO L480 AbstractCegarLoop]: Abstraction has 1686 states and 5728 transitions. [2021-02-19 19:24:22,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:22,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5728 transitions. [2021-02-19 19:24:22,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:22,123 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:22,123 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:22,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-02-19 19:24:22,326 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:22,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:22,326 INFO L82 PathProgramCache]: Analyzing trace with hash 949164153, now seen corresponding path program 17 times [2021-02-19 19:24:22,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:22,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106977734] [2021-02-19 19:24:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:22,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106977734] [2021-02-19 19:24:22,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739258241] [2021-02-19 19:24:22,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:24:22,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:24:22,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:22,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:22,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:22,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:22,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:24:22,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128250773] [2021-02-19 19:24:22,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:22,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:22,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:22,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:22,496 INFO L87 Difference]: Start difference. First operand 1686 states and 5728 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-02-19 19:24:23,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:23,096 INFO L93 Difference]: Finished difference Result 3478 states and 10820 transitions. [2021-02-19 19:24:23,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:24:23,097 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) 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 27 [2021-02-19 19:24:23,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:23,101 INFO L225 Difference]: With dead ends: 3478 [2021-02-19 19:24:23,101 INFO L226 Difference]: Without dead ends: 3478 [2021-02-19 19:24:23,102 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=1535, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 19:24:23,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-02-19 19:24:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 1866. [2021-02-19 19:24:23,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 3.4428954423592493) internal successors, (6421), 1865 states have internal predecessors, (6421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 6421 transitions. [2021-02-19 19:24:23,147 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 6421 transitions. Word has length 27 [2021-02-19 19:24:23,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:23,147 INFO L480 AbstractCegarLoop]: Abstraction has 1866 states and 6421 transitions. [2021-02-19 19:24:23,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-02-19 19:24:23,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 6421 transitions. [2021-02-19 19:24:23,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:23,151 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:23,151 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:23,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:23,352 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:23,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:23,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1681625589, now seen corresponding path program 18 times [2021-02-19 19:24:23,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:23,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623441927] [2021-02-19 19:24:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:23,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:23,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623441927] [2021-02-19 19:24:23,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747331673] [2021-02-19 19:24:23,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:24:23,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:24:23,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:23,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:23,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:23,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:23,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-02-19 19:24:23,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814489061] [2021-02-19 19:24:23,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:24:23,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:23,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:24:23,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:24:23,514 INFO L87 Difference]: Start difference. First operand 1866 states and 6421 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-02-19 19:24:24,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:24,128 INFO L93 Difference]: Finished difference Result 3323 states and 10443 transitions. [2021-02-19 19:24:24,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 19:24:24,129 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) 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 27 [2021-02-19 19:24:24,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:24,133 INFO L225 Difference]: With dead ends: 3323 [2021-02-19 19:24:24,134 INFO L226 Difference]: Without dead ends: 3319 [2021-02-19 19:24:24,134 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=1093, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 19:24:24,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3319 states. [2021-02-19 19:24:24,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3319 to 1834. [2021-02-19 19:24:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 3.4451718494271684) internal successors, (6315), 1833 states have internal predecessors, (6315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 6315 transitions. [2021-02-19 19:24:24,169 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 6315 transitions. Word has length 27 [2021-02-19 19:24:24,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:24,169 INFO L480 AbstractCegarLoop]: Abstraction has 1834 states and 6315 transitions. [2021-02-19 19:24:24,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) 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) [2021-02-19 19:24:24,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 6315 transitions. [2021-02-19 19:24:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:24,173 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:24,173 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:24,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-02-19 19:24:24,374 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:24,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:24,374 INFO L82 PathProgramCache]: Analyzing trace with hash -542461447, now seen corresponding path program 19 times [2021-02-19 19:24:24,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:24,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628842132] [2021-02-19 19:24:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:24,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628842132] [2021-02-19 19:24:24,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751526241] [2021-02-19 19:24:24,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:24,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:24,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:24,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:24,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-02-19 19:24:24,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306274498] [2021-02-19 19:24:24,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:24,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:24,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:24,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:24,502 INFO L87 Difference]: Start difference. First operand 1834 states and 6315 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:24,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:24,931 INFO L93 Difference]: Finished difference Result 3041 states and 9730 transitions. [2021-02-19 19:24:24,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:24:24,931 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:24,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:24,936 INFO L225 Difference]: With dead ends: 3041 [2021-02-19 19:24:24,936 INFO L226 Difference]: Without dead ends: 3029 [2021-02-19 19:24:24,936 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:24:24,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2021-02-19 19:24:24,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 1816. [2021-02-19 19:24:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.4512396694214877) internal successors, (6264), 1815 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:24,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 6264 transitions. [2021-02-19 19:24:24,966 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 6264 transitions. Word has length 27 [2021-02-19 19:24:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:24,966 INFO L480 AbstractCegarLoop]: Abstraction has 1816 states and 6264 transitions. [2021-02-19 19:24:24,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 6264 transitions. [2021-02-19 19:24:24,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:24,968 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:24,968 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:25,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:25,169 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:25,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:25,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1737523577, now seen corresponding path program 20 times [2021-02-19 19:24:25,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:25,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74398985] [2021-02-19 19:24:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:25,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74398985] [2021-02-19 19:24:25,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70558898] [2021-02-19 19:24:25,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:25,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:25,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:25,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:25,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:25,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:25,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-02-19 19:24:25,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841265525] [2021-02-19 19:24:25,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:25,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:25,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:25,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:25,297 INFO L87 Difference]: Start difference. First operand 1816 states and 6264 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:25,837 INFO L93 Difference]: Finished difference Result 4165 states and 13261 transitions. [2021-02-19 19:24:25,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:24:25,837 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:25,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:25,842 INFO L225 Difference]: With dead ends: 4165 [2021-02-19 19:24:25,843 INFO L226 Difference]: Without dead ends: 4165 [2021-02-19 19:24:25,843 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:24:25,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-02-19 19:24:25,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 2008. [2021-02-19 19:24:25,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.5366218236173395) internal successors, (7098), 2007 states have internal predecessors, (7098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:25,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7098 transitions. [2021-02-19 19:24:25,895 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7098 transitions. Word has length 27 [2021-02-19 19:24:25,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:25,895 INFO L480 AbstractCegarLoop]: Abstraction has 2008 states and 7098 transitions. [2021-02-19 19:24:25,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:25,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7098 transitions. [2021-02-19 19:24:25,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:25,898 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:25,899 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:26,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:26,114 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:26,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:26,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1098621191, now seen corresponding path program 21 times [2021-02-19 19:24:26,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:26,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245920233] [2021-02-19 19:24:26,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:26,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:26,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245920233] [2021-02-19 19:24:26,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076626126] [2021-02-19 19:24:26,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:26,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:24:26,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:26,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:26,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:26,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:26,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-02-19 19:24:26,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011296273] [2021-02-19 19:24:26,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:24:26,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:26,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:24:26,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:24:26,246 INFO L87 Difference]: Start difference. First operand 2008 states and 7098 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:26,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:26,794 INFO L93 Difference]: Finished difference Result 4184 states and 13322 transitions. [2021-02-19 19:24:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 19:24:26,795 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:26,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:26,800 INFO L225 Difference]: With dead ends: 4184 [2021-02-19 19:24:26,800 INFO L226 Difference]: Without dead ends: 4184 [2021-02-19 19:24:26,801 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:24:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4184 states. [2021-02-19 19:24:26,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4184 to 2009. [2021-02-19 19:24:26,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 3.5328685258964145) internal successors, (7094), 2008 states have internal predecessors, (7094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:26,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 7094 transitions. [2021-02-19 19:24:26,840 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 7094 transitions. Word has length 27 [2021-02-19 19:24:26,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:26,840 INFO L480 AbstractCegarLoop]: Abstraction has 2009 states and 7094 transitions. [2021-02-19 19:24:26,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:26,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 7094 transitions. [2021-02-19 19:24:26,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:26,842 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:26,842 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:27,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-02-19 19:24:27,043 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:27,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:27,043 INFO L82 PathProgramCache]: Analyzing trace with hash -347491855, now seen corresponding path program 22 times [2021-02-19 19:24:27,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:27,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537371623] [2021-02-19 19:24:27,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:27,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537371623] [2021-02-19 19:24:27,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729182623] [2021-02-19 19:24:27,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:27,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:27,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:27,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:27,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:27,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:27,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:27,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-02-19 19:24:27,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209522491] [2021-02-19 19:24:27,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:27,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:27,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:27,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:27,195 INFO L87 Difference]: Start difference. First operand 2009 states and 7094 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-02-19 19:24:27,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:27,607 INFO L93 Difference]: Finished difference Result 3911 states and 12446 transitions. [2021-02-19 19:24:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 19:24:27,608 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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 27 [2021-02-19 19:24:27,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:27,613 INFO L225 Difference]: With dead ends: 3911 [2021-02-19 19:24:27,613 INFO L226 Difference]: Without dead ends: 3907 [2021-02-19 19:24:27,613 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=268, Invalid=854, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:24:27,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-02-19 19:24:27,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 2031. [2021-02-19 19:24:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 3.531527093596059) internal successors, (7169), 2030 states have internal predecessors, (7169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 7169 transitions. [2021-02-19 19:24:27,648 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 7169 transitions. Word has length 27 [2021-02-19 19:24:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:27,648 INFO L480 AbstractCegarLoop]: Abstraction has 2031 states and 7169 transitions. [2021-02-19 19:24:27,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-02-19 19:24:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 7169 transitions. [2021-02-19 19:24:27,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:27,651 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:27,651 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:27,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-02-19 19:24:27,851 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:27,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:27,852 INFO L82 PathProgramCache]: Analyzing trace with hash 631065589, now seen corresponding path program 23 times [2021-02-19 19:24:27,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:27,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716106019] [2021-02-19 19:24:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:27,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716106019] [2021-02-19 19:24:27,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662460181] [2021-02-19 19:24:27,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:27,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:24:27,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:27,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:27,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:24:28,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:28,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-02-19 19:24:28,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319149598] [2021-02-19 19:24:28,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:28,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:28,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:28,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:28,008 INFO L87 Difference]: Start difference. First operand 2031 states and 7169 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-02-19 19:24:28,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:28,472 INFO L93 Difference]: Finished difference Result 4058 states and 12788 transitions. [2021-02-19 19:24:28,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:24:28,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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 27 [2021-02-19 19:24:28,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:28,478 INFO L225 Difference]: With dead ends: 4058 [2021-02-19 19:24:28,478 INFO L226 Difference]: Without dead ends: 4058 [2021-02-19 19:24:28,478 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 19:24:28,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-02-19 19:24:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 2015. [2021-02-19 19:24:28,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 3.5307845084409135) internal successors, (7111), 2014 states have internal predecessors, (7111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:28,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 7111 transitions. [2021-02-19 19:24:28,516 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 7111 transitions. Word has length 27 [2021-02-19 19:24:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:28,516 INFO L480 AbstractCegarLoop]: Abstraction has 2015 states and 7111 transitions. [2021-02-19 19:24:28,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) 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) [2021-02-19 19:24:28,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 7111 transitions. [2021-02-19 19:24:28,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:28,518 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:28,518 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:28,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:28,719 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:28,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:28,719 INFO L82 PathProgramCache]: Analyzing trace with hash 276877817, now seen corresponding path program 24 times [2021-02-19 19:24:28,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:28,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066782191] [2021-02-19 19:24:28,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:28,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066782191] [2021-02-19 19:24:28,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326217404] [2021-02-19 19:24:28,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:28,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:24:28,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:28,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:28,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:28,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:28,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:24:28,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76256357] [2021-02-19 19:24:28,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:28,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:28,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:28,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:28,849 INFO L87 Difference]: Start difference. First operand 2015 states and 7111 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:29,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:29,237 INFO L93 Difference]: Finished difference Result 3346 states and 10911 transitions. [2021-02-19 19:24:29,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 19:24:29,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:29,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:29,241 INFO L225 Difference]: With dead ends: 3346 [2021-02-19 19:24:29,242 INFO L226 Difference]: Without dead ends: 3334 [2021-02-19 19:24:29,242 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=220, Invalid=710, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:24:29,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-02-19 19:24:29,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 2049. [2021-02-19 19:24:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.5244140625) internal successors, (7218), 2048 states have internal predecessors, (7218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:29,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 7218 transitions. [2021-02-19 19:24:29,275 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 7218 transitions. Word has length 27 [2021-02-19 19:24:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:29,275 INFO L480 AbstractCegarLoop]: Abstraction has 2049 states and 7218 transitions. [2021-02-19 19:24:29,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:29,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 7218 transitions. [2021-02-19 19:24:29,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:29,277 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:29,277 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:29,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-02-19 19:24:29,478 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:29,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:29,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1198579957, now seen corresponding path program 25 times [2021-02-19 19:24:29,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:29,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773019520] [2021-02-19 19:24:29,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:29,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773019520] [2021-02-19 19:24:29,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862697238] [2021-02-19 19:24:29,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:29,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:29,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:29,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:29,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:29,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:24:29,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007027840] [2021-02-19 19:24:29,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:29,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:29,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:29,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:29,602 INFO L87 Difference]: Start difference. First operand 2049 states and 7218 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:30,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:30,049 INFO L93 Difference]: Finished difference Result 3635 states and 11672 transitions. [2021-02-19 19:24:30,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 19:24:30,050 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:30,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:30,055 INFO L225 Difference]: With dead ends: 3635 [2021-02-19 19:24:30,056 INFO L226 Difference]: Without dead ends: 3631 [2021-02-19 19:24:30,056 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=981, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:24:30,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2021-02-19 19:24:30,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 2132. [2021-02-19 19:24:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2132 states, 2131 states have (on average 3.5152510558423273) internal successors, (7491), 2131 states have internal predecessors, (7491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:30,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 7491 transitions. [2021-02-19 19:24:30,092 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 7491 transitions. Word has length 27 [2021-02-19 19:24:30,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:30,092 INFO L480 AbstractCegarLoop]: Abstraction has 2132 states and 7491 transitions. [2021-02-19 19:24:30,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:30,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 7491 transitions. [2021-02-19 19:24:30,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:24:30,095 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:30,095 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:30,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-02-19 19:24:30,296 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:30,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:30,296 INFO L82 PathProgramCache]: Analyzing trace with hash -2117829895, now seen corresponding path program 26 times [2021-02-19 19:24:30,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:30,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997981688] [2021-02-19 19:24:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:30,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997981688] [2021-02-19 19:24:30,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672437252] [2021-02-19 19:24:30,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:30,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:30,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:30,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:24:30,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:30,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:30,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-02-19 19:24:30,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403971279] [2021-02-19 19:24:30,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:24:30,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:30,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:24:30,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:24:30,417 INFO L87 Difference]: Start difference. First operand 2132 states and 7491 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:30,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:30,926 INFO L93 Difference]: Finished difference Result 3810 states and 12119 transitions. [2021-02-19 19:24:30,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:24:30,927 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:24:30,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:30,932 INFO L225 Difference]: With dead ends: 3810 [2021-02-19 19:24:30,932 INFO L226 Difference]: Without dead ends: 3810 [2021-02-19 19:24:30,932 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=392, Invalid=1330, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:24:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-02-19 19:24:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 2086. [2021-02-19 19:24:30,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 3.51462829736211) internal successors, (7328), 2085 states have internal predecessors, (7328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:30,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 7328 transitions. [2021-02-19 19:24:30,966 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 7328 transitions. Word has length 27 [2021-02-19 19:24:30,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:30,966 INFO L480 AbstractCegarLoop]: Abstraction has 2086 states and 7328 transitions. [2021-02-19 19:24:30,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:30,966 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 7328 transitions. [2021-02-19 19:24:30,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:24:30,969 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:30,969 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:31,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-02-19 19:24:31,172 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:31,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:31,172 INFO L82 PathProgramCache]: Analyzing trace with hash -499460581, now seen corresponding path program 29 times [2021-02-19 19:24:31,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:31,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998146709] [2021-02-19 19:24:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:31,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998146709] [2021-02-19 19:24:31,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041521746] [2021-02-19 19:24:31,746 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 [2021-02-19 19:24:31,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:24:31,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:31,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 19:24:31,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:32,312 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-02-19 19:24:32,488 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-02-19 19:24:32,734 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_17], 7=[A], 9=[v_prenex_14, v_prenex_18], 12=[v_prenex_16, v_prenex_15]} [2021-02-19 19:24:32,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:32,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:32,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:32,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2021-02-19 19:24:32,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:33,014 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-02-19 19:24:33,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:33,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,067 INFO L354 Elim1Store]: treesize reduction 12, result has 74.5 percent of original size [2021-02-19 19:24:33,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 44 [2021-02-19 19:24:33,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:33,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,133 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-02-19 19:24:33,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 32 [2021-02-19 19:24:33,136 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:33,581 WARN L202 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 103 [2021-02-19 19:24:33,582 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.7 percent of original size [2021-02-19 19:24:33,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,619 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-02-19 19:24:33,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 26 [2021-02-19 19:24:33,621 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:33,780 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-02-19 19:24:33,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:33,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,810 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-02-19 19:24:33,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 24 [2021-02-19 19:24:33,815 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:33,965 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-02-19 19:24:33,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:33,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:33,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,015 INFO L354 Elim1Store]: treesize reduction 36, result has 36.8 percent of original size [2021-02-19 19:24:34,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 33 [2021-02-19 19:24:34,017 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:34,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,065 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:34,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 69 [2021-02-19 19:24:34,113 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 2 xjuncts. [2021-02-19 19:24:34,384 WARN L202 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 78 [2021-02-19 19:24:34,385 INFO L628 ElimStorePlain]: treesize reduction 16, result has 94.6 percent of original size [2021-02-19 19:24:34,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,454 INFO L354 Elim1Store]: treesize reduction 14, result has 75.4 percent of original size [2021-02-19 19:24:34,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 55 [2021-02-19 19:24:34,487 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:34,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:34,534 INFO L354 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2021-02-19 19:24:34,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 45 [2021-02-19 19:24:34,548 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:34,685 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 19:24:34,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:34,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 9 xjuncts. [2021-02-19 19:24:34,691 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:433, output treesize:165 [2021-02-19 19:24:34,858 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2021-02-19 19:24:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:34,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:34,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 25 [2021-02-19 19:24:34,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178496960] [2021-02-19 19:24:34,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:24:34,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:34,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:24:34,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:24:34,934 INFO L87 Difference]: Start difference. First operand 2086 states and 7328 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:35,823 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-02-19 19:24:36,313 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 89 [2021-02-19 19:24:36,501 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2021-02-19 19:24:36,699 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-02-19 19:24:37,123 WARN L202 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 89 [2021-02-19 19:24:37,419 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2021-02-19 19:24:37,715 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2021-02-19 19:24:38,247 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 117 [2021-02-19 19:24:38,544 WARN L202 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2021-02-19 19:24:38,980 WARN L202 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 115 [2021-02-19 19:24:39,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:39,138 INFO L93 Difference]: Finished difference Result 2488 states and 8427 transitions. [2021-02-19 19:24:39,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 19:24:39,138 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:24:39,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:39,142 INFO L225 Difference]: With dead ends: 2488 [2021-02-19 19:24:39,142 INFO L226 Difference]: Without dead ends: 2458 [2021-02-19 19:24:39,143 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=469, Invalid=2393, Unknown=0, NotChecked=0, Total=2862 [2021-02-19 19:24:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2021-02-19 19:24:39,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 2119. [2021-02-19 19:24:39,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.514636449480642) internal successors, (7444), 2118 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7444 transitions. [2021-02-19 19:24:39,177 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7444 transitions. Word has length 29 [2021-02-19 19:24:39,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:39,177 INFO L480 AbstractCegarLoop]: Abstraction has 2119 states and 7444 transitions. [2021-02-19 19:24:39,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:39,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7444 transitions. [2021-02-19 19:24:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:24:39,180 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:39,180 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:39,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-02-19 19:24:39,381 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:39,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:39,381 INFO L82 PathProgramCache]: Analyzing trace with hash -2048903017, now seen corresponding path program 30 times [2021-02-19 19:24:39,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:39,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047067854] [2021-02-19 19:24:39,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:39,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047067854] [2021-02-19 19:24:39,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718920095] [2021-02-19 19:24:39,923 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 [2021-02-19 19:24:39,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:24:39,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:39,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:24:39,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:40,757 INFO L446 ElimStorePlain]: Different costs {1=[v_prenex_23], 10=[A], 14=[v_prenex_21]} [2021-02-19 19:24:40,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:40,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2021-02-19 19:24:40,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:40,881 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 19:24:40,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:40,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:40,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:40,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:40,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:40,923 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:40,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 62 [2021-02-19 19:24:40,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:40,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:40,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:40,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:40,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:40,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:40,968 INFO L354 Elim1Store]: treesize reduction 32, result has 39.6 percent of original size [2021-02-19 19:24:40,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 30 [2021-02-19 19:24:40,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:41,165 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2021-02-19 19:24:41,166 INFO L628 ElimStorePlain]: treesize reduction 2, result has 99.1 percent of original size [2021-02-19 19:24:41,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:41,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:41,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:41,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:41,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:41,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:41,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:41,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:41,217 INFO L354 Elim1Store]: treesize reduction 14, result has 73.6 percent of original size [2021-02-19 19:24:41,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 28 treesize of output 48 [2021-02-19 19:24:41,229 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:41,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:41,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:41,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:41,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:41,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:41,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:41,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:41,275 INFO L354 Elim1Store]: treesize reduction 12, result has 77.4 percent of original size [2021-02-19 19:24:41,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 28 treesize of output 50 [2021-02-19 19:24:41,297 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:41,467 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2021-02-19 19:24:41,467 INFO L628 ElimStorePlain]: treesize reduction 11, result has 93.9 percent of original size [2021-02-19 19:24:41,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 3 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:24:41,475 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:273, output treesize:108 [2021-02-19 19:24:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:41,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:41,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-02-19 19:24:41,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991919981] [2021-02-19 19:24:41,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:24:41,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:41,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:24:41,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:24:41,649 INFO L87 Difference]: Start difference. First operand 2119 states and 7444 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2021-02-19 19:24:42,979 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-02-19 19:24:43,396 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-02-19 19:24:43,900 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-02-19 19:24:44,422 WARN L202 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-02-19 19:24:44,571 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 19:24:44,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:44,729 INFO L93 Difference]: Finished difference Result 2343 states and 8003 transitions. [2021-02-19 19:24:44,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:24:44,730 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:24:44,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:44,733 INFO L225 Difference]: With dead ends: 2343 [2021-02-19 19:24:44,733 INFO L226 Difference]: Without dead ends: 2313 [2021-02-19 19:24:44,734 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=380, Invalid=2376, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 19:24:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2021-02-19 19:24:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 2119. [2021-02-19 19:24:44,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 3.514636449480642) internal successors, (7444), 2118 states have internal predecessors, (7444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 7444 transitions. [2021-02-19 19:24:44,760 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 7444 transitions. Word has length 29 [2021-02-19 19:24:44,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:44,760 INFO L480 AbstractCegarLoop]: Abstraction has 2119 states and 7444 transitions. [2021-02-19 19:24:44,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 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) [2021-02-19 19:24:44,760 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 7444 transitions. [2021-02-19 19:24:44,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:24:44,762 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:44,763 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:44,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-02-19 19:24:44,963 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:44,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:44,963 INFO L82 PathProgramCache]: Analyzing trace with hash -250044777, now seen corresponding path program 31 times [2021-02-19 19:24:44,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:44,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186982751] [2021-02-19 19:24:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:45,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186982751] [2021-02-19 19:24:45,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675088978] [2021-02-19 19:24:45,571 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:45,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 19:24:45,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:46,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:46,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 19:24:46,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7935819] [2021-02-19 19:24:46,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 19:24:46,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:46,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 19:24:46,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:24:46,186 INFO L87 Difference]: Start difference. First operand 2119 states and 7444 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:46,943 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-02-19 19:24:47,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:47,292 INFO L93 Difference]: Finished difference Result 2254 states and 7787 transitions. [2021-02-19 19:24:47,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 19:24:47,293 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:24:47,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:47,296 INFO L225 Difference]: With dead ends: 2254 [2021-02-19 19:24:47,296 INFO L226 Difference]: Without dead ends: 2239 [2021-02-19 19:24:47,297 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:24:47,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2021-02-19 19:24:47,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 2123. [2021-02-19 19:24:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2123 states, 2122 states have (on average 3.514608859566447) internal successors, (7458), 2122 states have internal predecessors, (7458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2123 states to 2123 states and 7458 transitions. [2021-02-19 19:24:47,320 INFO L78 Accepts]: Start accepts. Automaton has 2123 states and 7458 transitions. Word has length 29 [2021-02-19 19:24:47,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:47,320 INFO L480 AbstractCegarLoop]: Abstraction has 2123 states and 7458 transitions. [2021-02-19 19:24:47,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:47,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2123 states and 7458 transitions. [2021-02-19 19:24:47,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:24:47,323 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:47,323 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:47,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:47,524 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:47,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:47,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1568018695, now seen corresponding path program 32 times [2021-02-19 19:24:47,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:47,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876059440] [2021-02-19 19:24:47,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:48,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876059440] [2021-02-19 19:24:48,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559917443] [2021-02-19 19:24:48,105 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:48,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:24:48,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:48,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 19:24:48,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:48,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,536 INFO L354 Elim1Store]: treesize reduction 14, result has 70.2 percent of original size [2021-02-19 19:24:48,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 42 [2021-02-19 19:24:48,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:48,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,602 INFO L354 Elim1Store]: treesize reduction 22, result has 60.0 percent of original size [2021-02-19 19:24:48,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 45 [2021-02-19 19:24:48,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:48,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,663 INFO L354 Elim1Store]: treesize reduction 26, result has 44.7 percent of original size [2021-02-19 19:24:48,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 30 [2021-02-19 19:24:48,666 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:48,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:48,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:48,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2021-02-19 19:24:48,686 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:48,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,723 INFO L354 Elim1Store]: treesize reduction 19, result has 29.6 percent of original size [2021-02-19 19:24:48,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 17 [2021-02-19 19:24:48,725 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:48,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 19:24:48,730 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:48,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 19:24:48,733 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:48,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:48,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:48,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:48,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:24:48,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-02-19 19:24:48,742 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:48,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:48,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:48,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 67 [2021-02-19 19:24:48,803 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 2 xjuncts. [2021-02-19 19:24:48,880 INFO L628 ElimStorePlain]: treesize reduction 101, result has 36.9 percent of original size [2021-02-19 19:24:48,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:24:48,881 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 1 variables, input treesize:406, output treesize:59 [2021-02-19 19:24:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:49,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:49,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-02-19 19:24:49,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321899196] [2021-02-19 19:24:49,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:24:49,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:49,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:24:49,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:24:49,045 INFO L87 Difference]: Start difference. First operand 2123 states and 7458 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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) [2021-02-19 19:24:49,980 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-02-19 19:24:50,434 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-02-19 19:24:50,669 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-02-19 19:24:51,012 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2021-02-19 19:24:51,779 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-02-19 19:24:51,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:51,846 INFO L93 Difference]: Finished difference Result 2753 states and 9255 transitions. [2021-02-19 19:24:51,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 19:24:51,847 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:24:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:51,851 INFO L225 Difference]: With dead ends: 2753 [2021-02-19 19:24:51,851 INFO L226 Difference]: Without dead ends: 2703 [2021-02-19 19:24:51,851 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=524, Invalid=2668, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 19:24:51,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2021-02-19 19:24:51,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2155. [2021-02-19 19:24:51,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2154 states have (on average 3.510677808727948) internal successors, (7562), 2154 states have internal predecessors, (7562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:51,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 7562 transitions. [2021-02-19 19:24:51,880 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 7562 transitions. Word has length 29 [2021-02-19 19:24:51,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:51,880 INFO L480 AbstractCegarLoop]: Abstraction has 2155 states and 7562 transitions. [2021-02-19 19:24:51,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 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) [2021-02-19 19:24:51,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 7562 transitions. [2021-02-19 19:24:51,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:24:51,883 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:51,883 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:52,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-02-19 19:24:52,084 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:52,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:52,084 INFO L82 PathProgramCache]: Analyzing trace with hash -802905909, now seen corresponding path program 33 times [2021-02-19 19:24:52,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:52,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16508608] [2021-02-19 19:24:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:52,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16508608] [2021-02-19 19:24:52,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261747246] [2021-02-19 19:24:52,635 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:52,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 19:24:52,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:52,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 19:24:52,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:53,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:53,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 71 [2021-02-19 19:24:53,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:53,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:24:53,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-02-19 19:24:53,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:53,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,235 INFO L354 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2021-02-19 19:24:53,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 32 [2021-02-19 19:24:53,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:53,240 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 19:24:53,241 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:53,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 19:24:53,245 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:53,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 19:24:53,248 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:53,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,295 INFO L354 Elim1Store]: treesize reduction 38, result has 35.6 percent of original size [2021-02-19 19:24:53,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 33 [2021-02-19 19:24:53,297 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:53,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,324 INFO L354 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2021-02-19 19:24:53,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 19 [2021-02-19 19:24:53,326 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:53,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:24:53,347 INFO L354 Elim1Store]: treesize reduction 21, result has 32.3 percent of original size [2021-02-19 19:24:53,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 19 [2021-02-19 19:24:53,349 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:24:53,413 INFO L628 ElimStorePlain]: treesize reduction 65, result has 40.4 percent of original size [2021-02-19 19:24:53,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-02-19 19:24:53,414 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 2 variables, input treesize:355, output treesize:34 [2021-02-19 19:24:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:53,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:53,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 19:24:53,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551281921] [2021-02-19 19:24:53,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:24:53,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:53,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:24:53,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:24:53,527 INFO L87 Difference]: Start difference. First operand 2155 states and 7562 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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) [2021-02-19 19:24:54,941 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-02-19 19:24:55,355 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2021-02-19 19:24:55,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:55,642 INFO L93 Difference]: Finished difference Result 2815 states and 9393 transitions. [2021-02-19 19:24:55,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 19:24:55,643 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:24:55,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:55,647 INFO L225 Difference]: With dead ends: 2815 [2021-02-19 19:24:55,647 INFO L226 Difference]: Without dead ends: 2771 [2021-02-19 19:24:55,647 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=413, Invalid=2137, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 19:24:55,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2771 states. [2021-02-19 19:24:55,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2771 to 2174. [2021-02-19 19:24:55,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2173 states have (on average 3.514956281638288) internal successors, (7638), 2173 states have internal predecessors, (7638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 7638 transitions. [2021-02-19 19:24:55,678 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 7638 transitions. Word has length 29 [2021-02-19 19:24:55,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:55,678 INFO L480 AbstractCegarLoop]: Abstraction has 2174 states and 7638 transitions. [2021-02-19 19:24:55,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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) [2021-02-19 19:24:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 7638 transitions. [2021-02-19 19:24:55,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:24:55,681 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:55,681 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:55,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:55,886 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:55,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:55,886 INFO L82 PathProgramCache]: Analyzing trace with hash 201067967, now seen corresponding path program 34 times [2021-02-19 19:24:55,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:55,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902786313] [2021-02-19 19:24:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:56,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902786313] [2021-02-19 19:24:56,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309954359] [2021-02-19 19:24:56,484 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:56,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:24:56,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:56,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 19:24:56,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:24:57,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:57,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:24:57,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 19:24:57,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432395759] [2021-02-19 19:24:57,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:24:57,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:24:57,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:24:57,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:24:57,009 INFO L87 Difference]: Start difference. First operand 2174 states and 7638 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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) [2021-02-19 19:24:58,404 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-02-19 19:24:58,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:24:58,869 INFO L93 Difference]: Finished difference Result 2537 states and 8578 transitions. [2021-02-19 19:24:58,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:24:58,869 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:24:58,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:24:58,873 INFO L225 Difference]: With dead ends: 2537 [2021-02-19 19:24:58,873 INFO L226 Difference]: Without dead ends: 2500 [2021-02-19 19:24:58,874 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=357, Invalid=1995, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 19:24:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-02-19 19:24:58,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2172. [2021-02-19 19:24:58,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2171 states have (on average 3.514048825426071) internal successors, (7629), 2171 states have internal predecessors, (7629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:24:58,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 7629 transitions. [2021-02-19 19:24:58,904 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 7629 transitions. Word has length 29 [2021-02-19 19:24:58,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:24:58,904 INFO L480 AbstractCegarLoop]: Abstraction has 2172 states and 7629 transitions. [2021-02-19 19:24:58,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 23 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) [2021-02-19 19:24:58,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 7629 transitions. [2021-02-19 19:24:58,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:24:58,906 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:24:58,906 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:24:59,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:59,108 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:24:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:24:59,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1089195501, now seen corresponding path program 35 times [2021-02-19 19:24:59,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:24:59,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734590846] [2021-02-19 19:24:59,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:24:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:24:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:24:59,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734590846] [2021-02-19 19:24:59,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389418081] [2021-02-19 19:24:59,610 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:24:59,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 19:24:59,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:24:59,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 19:24:59,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:00,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:00,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-02-19 19:25:00,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416398955] [2021-02-19 19:25:00,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 19:25:00,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:00,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 19:25:00,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:25:00,164 INFO L87 Difference]: Start difference. First operand 2172 states and 7629 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:25:00,745 INFO L93 Difference]: Finished difference Result 2277 states and 7882 transitions. [2021-02-19 19:25:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 19:25:00,745 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:25:00,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:25:00,748 INFO L225 Difference]: With dead ends: 2277 [2021-02-19 19:25:00,748 INFO L226 Difference]: Without dead ends: 2262 [2021-02-19 19:25:00,748 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:25:00,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-02-19 19:25:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2172. [2021-02-19 19:25:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2172 states, 2171 states have (on average 3.514048825426071) internal successors, (7629), 2171 states have internal predecessors, (7629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 7629 transitions. [2021-02-19 19:25:00,774 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 7629 transitions. Word has length 29 [2021-02-19 19:25:00,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:25:00,774 INFO L480 AbstractCegarLoop]: Abstraction has 2172 states and 7629 transitions. [2021-02-19 19:25:00,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:00,774 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 7629 transitions. [2021-02-19 19:25:00,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:25:00,791 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:25:00,791 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:25:00,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-02-19 19:25:00,992 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:25:00,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:25:00,992 INFO L82 PathProgramCache]: Analyzing trace with hash -3785701, now seen corresponding path program 13 times [2021-02-19 19:25:00,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:25:00,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343740725] [2021-02-19 19:25:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:25:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:01,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343740725] [2021-02-19 19:25:01,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901489066] [2021-02-19 19:25:01,633 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:25:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:25:01,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 19:25:01,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:25:02,573 WARN L202 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2021-02-19 19:25:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:25:02,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:25:02,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2021-02-19 19:25:02,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917456012] [2021-02-19 19:25:02,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 19:25:02,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:25:02,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 19:25:02,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:25:02,830 INFO L87 Difference]: Start difference. First operand 2172 states and 7629 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:25:07,778 WARN L202 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-02-19 19:25:08,396 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-02-19 19:25:28,666 WARN L202 SmtUtils]: Spent 20.22 s on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 19:25:34,884 WARN L202 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2021-02-19 19:25:41,117 WARN L202 SmtUtils]: Spent 6.20 s on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2021-02-19 19:25:48,573 WARN L202 SmtUtils]: Spent 7.42 s on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-02-19 19:25:48,748 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 34 [2021-02-19 19:25:49,030 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 19:25:49,216 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-02-19 19:25:49,465 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-02-19 19:25:49,675 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-02-19 19:25:49,879 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-02-19 19:26:12,181 WARN L202 SmtUtils]: Spent 22.24 s on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2021-02-19 19:26:38,682 WARN L202 SmtUtils]: Spent 26.46 s on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-02-19 19:26:43,016 WARN L202 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-02-19 19:26:55,313 WARN L202 SmtUtils]: Spent 12.25 s on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2021-02-19 19:26:55,651 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2021-02-19 19:26:55,900 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-02-19 19:26:56,053 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-19 19:26:56,294 WARN L202 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2021-02-19 19:26:56,799 WARN L202 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2021-02-19 19:26:57,191 WARN L202 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2021-02-19 19:26:57,487 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2021-02-19 19:27:20,233 WARN L202 SmtUtils]: Spent 22.31 s on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2021-02-19 19:27:20,642 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2021-02-19 19:27:21,011 WARN L202 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2021-02-19 19:27:21,659 WARN L202 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-02-19 19:27:21,835 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-02-19 19:27:21,968 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2021-02-19 19:27:22,206 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2021-02-19 19:27:22,911 WARN L202 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2021-02-19 19:27:23,112 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 19:27:23,465 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2021-02-19 19:27:23,667 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2021-02-19 19:27:23,915 WARN L202 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 49 [2021-02-19 19:27:24,296 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 62 [2021-02-19 19:27:24,763 WARN L202 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 96 [2021-02-19 19:27:25,044 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2021-02-19 19:27:25,477 WARN L202 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 66 [2021-02-19 19:27:25,756 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 42 [2021-02-19 19:27:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:27:25,837 INFO L93 Difference]: Finished difference Result 4677 states and 15384 transitions. [2021-02-19 19:27:25,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-02-19 19:27:25,838 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:27:25,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:27:25,845 INFO L225 Difference]: With dead ends: 4677 [2021-02-19 19:27:25,845 INFO L226 Difference]: Without dead ends: 4662 [2021-02-19 19:27:25,846 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3634 ImplicationChecksByTransitivity, 141.8s TimeCoverageRelationStatistics Valid=1311, Invalid=8195, Unknown=0, NotChecked=0, Total=9506 [2021-02-19 19:27:25,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4662 states. [2021-02-19 19:27:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4662 to 2182. [2021-02-19 19:27:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2182 states, 2181 states have (on average 3.5112333791838606) internal successors, (7658), 2181 states have internal predecessors, (7658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2182 states to 2182 states and 7658 transitions. [2021-02-19 19:27:25,889 INFO L78 Accepts]: Start accepts. Automaton has 2182 states and 7658 transitions. Word has length 29 [2021-02-19 19:27:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:27:25,889 INFO L480 AbstractCegarLoop]: Abstraction has 2182 states and 7658 transitions. [2021-02-19 19:27:25,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 2182 states and 7658 transitions. [2021-02-19 19:27:25,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:27:25,892 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:27:25,892 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:27:26,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-02-19 19:27:26,092 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:27:26,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:27:26,093 INFO L82 PathProgramCache]: Analyzing trace with hash -709958953, now seen corresponding path program 14 times [2021-02-19 19:27:26,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:27:26,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76410682] [2021-02-19 19:27:26,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:27:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:27:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:26,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76410682] [2021-02-19 19:27:26,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455739861] [2021-02-19 19:27:26,609 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:27:26,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:27:26,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:27:26,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 19:27:26,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:27:27,181 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 19:27:27,350 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-02-19 19:27:54,176 WARN L202 SmtUtils]: Spent 26.58 s on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2021-02-19 19:27:54,395 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_54], 14=[v_prenex_50, A, v_prenex_52, v_prenex_55]} [2021-02-19 19:27:54,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:54,449 INFO L354 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2021-02-19 19:27:54,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 17 treesize of output 31 [2021-02-19 19:27:54,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:54,646 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-02-19 19:27:54,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:54,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:54,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:54,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:54,809 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-02-19 19:27:54,809 INFO L354 Elim1Store]: treesize reduction 26, result has 74.8 percent of original size [2021-02-19 19:27:54,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 26 treesize of output 86 [2021-02-19 19:27:54,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:55,314 WARN L202 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 98 [2021-02-19 19:27:55,315 INFO L628 ElimStorePlain]: treesize reduction 99, result has 72.3 percent of original size [2021-02-19 19:27:55,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:55,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:55,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:55,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:55,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 26 treesize of output 112 [2021-02-19 19:27:55,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:55,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:55,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:55,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:56,169 WARN L202 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-02-19 19:27:56,170 INFO L354 Elim1Store]: treesize reduction 26, result has 74.8 percent of original size [2021-02-19 19:27:56,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 26 treesize of output 86 [2021-02-19 19:27:56,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:56,630 WARN L202 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2021-02-19 19:27:56,630 INFO L628 ElimStorePlain]: treesize reduction 18, result has 92.3 percent of original size [2021-02-19 19:27:56,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:56,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:56,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:56,790 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-02-19 19:27:56,790 INFO L354 Elim1Store]: treesize reduction 26, result has 74.8 percent of original size [2021-02-19 19:27:56,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 26 treesize of output 86 [2021-02-19 19:27:56,826 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:27:57,143 WARN L202 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2021-02-19 19:27:57,144 INFO L628 ElimStorePlain]: treesize reduction 43, result has 82.2 percent of original size [2021-02-19 19:27:57,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:57,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:57,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:27:57,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:27:57,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 26 treesize of output 112 [2021-02-19 19:27:57,469 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2021-02-19 19:27:57,813 WARN L202 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 75 [2021-02-19 19:27:57,813 INFO L628 ElimStorePlain]: treesize reduction 283, result has 37.9 percent of original size [2021-02-19 19:27:57,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 5 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-02-19 19:27:57,823 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 14 variables, input treesize:287, output treesize:123 [2021-02-19 19:27:58,067 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-02-19 19:27:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:27:58,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:27:58,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-02-19 19:27:58,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209670873] [2021-02-19 19:27:58,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:27:58,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:27:58,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:27:58,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:27:58,120 INFO L87 Difference]: Start difference. First operand 2182 states and 7658 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:27:58,739 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2021-02-19 19:27:58,973 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 38 [2021-02-19 19:27:59,528 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-02-19 19:28:07,792 WARN L202 SmtUtils]: Spent 8.17 s on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2021-02-19 19:28:07,993 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2021-02-19 19:28:08,143 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 19:28:08,426 WARN L202 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 40 [2021-02-19 19:28:22,932 WARN L202 SmtUtils]: Spent 14.36 s on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2021-02-19 19:28:29,032 WARN L202 SmtUtils]: Spent 6.02 s on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-02-19 19:28:35,382 WARN L202 SmtUtils]: Spent 6.29 s on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2021-02-19 19:28:35,853 WARN L202 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-02-19 19:28:54,447 WARN L202 SmtUtils]: Spent 18.46 s on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2021-02-19 19:28:55,040 WARN L202 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-02-19 19:28:55,582 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-02-19 19:28:58,179 WARN L202 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2021-02-19 19:28:58,658 WARN L202 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2021-02-19 19:29:19,513 WARN L202 SmtUtils]: Spent 20.69 s on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2021-02-19 19:29:20,096 WARN L202 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2021-02-19 19:29:49,115 WARN L202 SmtUtils]: Spent 28.84 s on a formula simplification. DAG size of input: 101 DAG size of output: 98 [2021-02-19 19:30:16,026 WARN L202 SmtUtils]: Spent 26.84 s on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2021-02-19 19:30:16,887 WARN L202 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-02-19 19:30:17,572 WARN L202 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2021-02-19 19:30:17,911 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-02-19 19:30:18,344 WARN L202 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-02-19 19:30:18,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:18,524 INFO L93 Difference]: Finished difference Result 3354 states and 11052 transitions. [2021-02-19 19:30:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 19:30:18,526 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:30:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:18,532 INFO L225 Difference]: With dead ends: 3354 [2021-02-19 19:30:18,532 INFO L226 Difference]: Without dead ends: 3324 [2021-02-19 19:30:18,532 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 163.7s TimeCoverageRelationStatistics Valid=490, Invalid=2816, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 19:30:18,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3324 states. [2021-02-19 19:30:18,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3324 to 2191. [2021-02-19 19:30:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2190 states have (on average 3.5105022831050228) internal successors, (7688), 2190 states have internal predecessors, (7688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 7688 transitions. [2021-02-19 19:30:18,578 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 7688 transitions. Word has length 29 [2021-02-19 19:30:18,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:18,578 INFO L480 AbstractCegarLoop]: Abstraction has 2191 states and 7688 transitions. [2021-02-19 19:30:18,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:18,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 7688 transitions. [2021-02-19 19:30:18,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:30:18,581 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:18,581 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:18,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-02-19 19:30:18,782 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:18,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:18,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1035325083, now seen corresponding path program 15 times [2021-02-19 19:30:18,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:18,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980183298] [2021-02-19 19:30:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:18,934 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2021-02-19 19:30:19,063 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-02-19 19:30:19,208 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-02-19 19:30:19,362 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-02-19 19:30:19,492 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-02-19 19:30:19,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:19,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980183298] [2021-02-19 19:30:19,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553111195] [2021-02-19 19:30:19,897 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:19,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:30:19,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:19,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:30:19,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:21,245 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 19:30:21,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:21,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:21,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:21,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:21,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:21,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:21,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:21,852 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-02-19 19:30:21,853 INFO L354 Elim1Store]: treesize reduction 14, result has 82.3 percent of original size [2021-02-19 19:30:21,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 28 treesize of output 74 [2021-02-19 19:30:21,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:21,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,300 WARN L202 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-02-19 19:30:22,301 INFO L354 Elim1Store]: treesize reduction 16, result has 79.7 percent of original size [2021-02-19 19:30:22,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 28 treesize of output 72 [2021-02-19 19:30:22,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:22,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,446 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-02-19 19:30:22,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 13 [2021-02-19 19:30:22,450 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:22,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,562 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-02-19 19:30:22,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 13 [2021-02-19 19:30:22,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:22,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:30:22,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 19:30:22,619 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:22,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,700 INFO L354 Elim1Store]: treesize reduction 78, result has 1.3 percent of original size [2021-02-19 19:30:22,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 13 [2021-02-19 19:30:22,703 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:22,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:22,904 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-19 19:30:22,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:30:22,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 28 treesize of output 88 [2021-02-19 19:30:22,997 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 3 xjuncts. [2021-02-19 19:30:23,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:23,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:23,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:23,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:23,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:23,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:23,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:23,235 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-02-19 19:30:23,235 INFO L354 Elim1Store]: treesize reduction 26, result has 67.1 percent of original size [2021-02-19 19:30:23,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 28 treesize of output 62 [2021-02-19 19:30:23,272 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:23,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:23,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:23,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:23,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:23,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:23,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:30:23,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2021-02-19 19:30:23,326 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:23,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-02-19 19:30:23,339 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:23,882 WARN L202 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 34 [2021-02-19 19:30:23,883 INFO L628 ElimStorePlain]: treesize reduction 208, result has 45.8 percent of original size [2021-02-19 19:30:23,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-02-19 19:30:23,887 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 2 variables, input treesize:616, output treesize:216 [2021-02-19 19:30:24,408 WARN L202 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-02-19 19:30:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:24,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:24,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2021-02-19 19:30:24,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288233100] [2021-02-19 19:30:24,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:30:24,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:24,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:30:24,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:30:24,619 INFO L87 Difference]: Start difference. First operand 2191 states and 7688 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:25,083 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-02-19 19:30:25,419 WARN L202 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 19:30:25,832 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2021-02-19 19:30:26,336 WARN L202 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-02-19 19:30:26,602 WARN L202 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-02-19 19:30:27,137 WARN L202 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-02-19 19:30:27,406 WARN L202 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-02-19 19:30:27,864 WARN L202 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-02-19 19:30:28,154 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-02-19 19:30:28,349 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 19:30:28,668 WARN L202 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 19:30:28,904 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-02-19 19:30:29,343 WARN L202 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-02-19 19:30:29,738 WARN L202 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-02-19 19:30:30,140 WARN L202 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-02-19 19:30:30,642 WARN L202 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2021-02-19 19:30:31,049 WARN L202 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-02-19 19:30:31,511 WARN L202 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-02-19 19:30:31,761 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-02-19 19:30:32,270 WARN L202 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-02-19 19:30:32,785 WARN L202 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-02-19 19:30:33,227 WARN L202 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2021-02-19 19:30:33,745 WARN L202 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-02-19 19:30:33,986 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 19:30:34,338 WARN L202 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-02-19 19:30:34,888 WARN L202 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-02-19 19:30:35,302 WARN L202 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-02-19 19:30:35,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:35,623 INFO L93 Difference]: Finished difference Result 3325 states and 11039 transitions. [2021-02-19 19:30:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:30:35,626 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:30:35,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:35,632 INFO L225 Difference]: With dead ends: 3325 [2021-02-19 19:30:35,632 INFO L226 Difference]: Without dead ends: 3260 [2021-02-19 19:30:35,632 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=410, Invalid=2782, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 19:30:35,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2021-02-19 19:30:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 2219. [2021-02-19 19:30:35,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 2218 states have (on average 3.5040577096483316) internal successors, (7772), 2218 states have internal predecessors, (7772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:35,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 7772 transitions. [2021-02-19 19:30:35,668 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 7772 transitions. Word has length 29 [2021-02-19 19:30:35,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:35,668 INFO L480 AbstractCegarLoop]: Abstraction has 2219 states and 7772 transitions. [2021-02-19 19:30:35,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:35,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 7772 transitions. [2021-02-19 19:30:35,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:30:35,671 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:35,671 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:35,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable689 [2021-02-19 19:30:35,871 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:35,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:35,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1098413475, now seen corresponding path program 16 times [2021-02-19 19:30:35,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:35,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136979730] [2021-02-19 19:30:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:36,131 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-02-19 19:30:36,280 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-02-19 19:30:36,441 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-02-19 19:30:36,613 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-02-19 19:30:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:37,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136979730] [2021-02-19 19:30:37,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455432949] [2021-02-19 19:30:37,151 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:37,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:30:37,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:37,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:30:37,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:38,111 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-02-19 19:30:38,405 WARN L202 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-02-19 19:30:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:38,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:38,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-02-19 19:30:38,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946225145] [2021-02-19 19:30:38,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:30:38,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:38,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:30:38,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:30:38,684 INFO L87 Difference]: Start difference. First operand 2219 states and 7772 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:39,086 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-02-19 19:30:39,643 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-02-19 19:30:39,871 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-02-19 19:30:40,683 WARN L202 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-02-19 19:30:41,092 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-02-19 19:30:41,910 WARN L202 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2021-02-19 19:30:42,272 WARN L202 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-02-19 19:30:42,736 WARN L202 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-02-19 19:30:42,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:42,853 INFO L93 Difference]: Finished difference Result 3098 states and 10370 transitions. [2021-02-19 19:30:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 19:30:42,856 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:30:42,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:42,862 INFO L225 Difference]: With dead ends: 3098 [2021-02-19 19:30:42,862 INFO L226 Difference]: Without dead ends: 3083 [2021-02-19 19:30:42,862 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:30:42,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3083 states. [2021-02-19 19:30:42,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3083 to 2215. [2021-02-19 19:30:42,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2215 states, 2214 states have (on average 3.5049683830171636) internal successors, (7760), 2214 states have internal predecessors, (7760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:42,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 7760 transitions. [2021-02-19 19:30:42,899 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 7760 transitions. Word has length 29 [2021-02-19 19:30:42,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:42,899 INFO L480 AbstractCegarLoop]: Abstraction has 2215 states and 7760 transitions. [2021-02-19 19:30:42,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 7760 transitions. [2021-02-19 19:30:42,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:30:42,903 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:42,903 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:43,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable777,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:43,123 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:43,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:43,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1078929057, now seen corresponding path program 17 times [2021-02-19 19:30:43,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:43,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28895247] [2021-02-19 19:30:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:43,284 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2021-02-19 19:30:43,431 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-02-19 19:30:43,590 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-02-19 19:30:43,763 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-02-19 19:30:43,897 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-02-19 19:30:44,023 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-02-19 19:30:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:44,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28895247] [2021-02-19 19:30:44,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434838223] [2021-02-19 19:30:44,362 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:44,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:30:44,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:44,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:30:44,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:45,589 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2021-02-19 19:30:45,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,702 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-02-19 19:30:45,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-02-19 19:30:45,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:45,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,810 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-02-19 19:30:45,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-02-19 19:30:45,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:45,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,867 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:30:45,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-02-19 19:30:45,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:45,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,923 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:30:45,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-02-19 19:30:45,926 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:45,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:45,997 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:30:45,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-02-19 19:30:46,001 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:46,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:30:46,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-02-19 19:30:46,132 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:46,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:30:46,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-02-19 19:30:46,253 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:46,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,325 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-02-19 19:30:46,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 13 [2021-02-19 19:30:46,329 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:46,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:30:46,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-02-19 19:30:46,392 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:46,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:30:46,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 19:30:46,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2021-02-19 19:30:46,434 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:46,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,530 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-02-19 19:30:46,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-02-19 19:30:46,535 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:46,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:30:46,568 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:30:46,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-02-19 19:30:46,572 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-02-19 19:30:47,052 WARN L202 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-02-19 19:30:47,053 INFO L628 ElimStorePlain]: treesize reduction 59, result has 62.2 percent of original size [2021-02-19 19:30:47,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-02-19 19:30:47,056 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 1 variables, input treesize:587, output treesize:97 [2021-02-19 19:30:47,277 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-02-19 19:30:47,532 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 18 [2021-02-19 19:30:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:47,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:47,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-02-19 19:30:47,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901765326] [2021-02-19 19:30:47,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 19:30:47,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:47,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 19:30:47,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:30:47,591 INFO L87 Difference]: Start difference. First operand 2215 states and 7760 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:47,999 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-02-19 19:30:48,308 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 19:30:48,524 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-02-19 19:30:48,677 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-02-19 19:30:49,279 WARN L202 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2021-02-19 19:30:49,792 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-02-19 19:30:50,132 WARN L202 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2021-02-19 19:30:50,547 WARN L202 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-02-19 19:30:50,805 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-02-19 19:30:51,231 WARN L202 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2021-02-19 19:30:51,736 WARN L202 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-02-19 19:30:52,188 WARN L202 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-02-19 19:30:52,876 WARN L202 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-02-19 19:30:53,299 WARN L202 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-02-19 19:30:53,541 WARN L202 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-02-19 19:30:53,721 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 19:30:54,362 WARN L202 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2021-02-19 19:30:54,723 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-02-19 19:30:54,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:30:54,871 INFO L93 Difference]: Finished difference Result 3080 states and 10383 transitions. [2021-02-19 19:30:54,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 19:30:54,874 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:30:54,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:30:54,880 INFO L225 Difference]: With dead ends: 3080 [2021-02-19 19:30:54,880 INFO L226 Difference]: Without dead ends: 3030 [2021-02-19 19:30:54,880 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=343, Invalid=1913, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 19:30:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-02-19 19:30:54,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2237. [2021-02-19 19:30:54,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 3.5035778175313057) internal successors, (7834), 2236 states have internal predecessors, (7834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 7834 transitions. [2021-02-19 19:30:54,919 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 7834 transitions. Word has length 29 [2021-02-19 19:30:54,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:30:54,919 INFO L480 AbstractCegarLoop]: Abstraction has 2237 states and 7834 transitions. [2021-02-19 19:30:54,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 26 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:54,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 7834 transitions. [2021-02-19 19:30:54,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:30:54,922 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:30:54,922 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:30:55,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-02-19 19:30:55,123 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:30:55,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:30:55,123 INFO L82 PathProgramCache]: Analyzing trace with hash -654595181, now seen corresponding path program 18 times [2021-02-19 19:30:55,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:30:55,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883790053] [2021-02-19 19:30:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:30:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:30:55,280 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2021-02-19 19:30:55,432 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-02-19 19:30:55,588 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-02-19 19:30:55,755 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-02-19 19:30:55,892 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 24 [2021-02-19 19:30:56,023 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 23 [2021-02-19 19:30:56,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:56,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883790053] [2021-02-19 19:30:56,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257299561] [2021-02-19 19:30:56,381 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:30:56,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 19:30:56,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:30:56,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 19:30:56,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:30:57,354 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-02-19 19:30:57,662 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 19:30:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:30:57,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:30:57,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-02-19 19:30:57,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217572973] [2021-02-19 19:30:57,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:30:57,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:30:57,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:30:57,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:30:57,919 INFO L87 Difference]: Start difference. First operand 2237 states and 7834 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:30:59,860 WARN L202 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-02-19 19:31:00,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:31:00,280 INFO L93 Difference]: Finished difference Result 2776 states and 9498 transitions. [2021-02-19 19:31:00,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:31:00,283 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:31:00,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:31:00,288 INFO L225 Difference]: With dead ends: 2776 [2021-02-19 19:31:00,288 INFO L226 Difference]: Without dead ends: 2761 [2021-02-19 19:31:00,288 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:31:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-02-19 19:31:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2227. [2021-02-19 19:31:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2226 states have (on average 3.506289308176101) internal successors, (7805), 2226 states have internal predecessors, (7805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 7805 transitions. [2021-02-19 19:31:00,322 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 7805 transitions. Word has length 29 [2021-02-19 19:31:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:31:00,322 INFO L480 AbstractCegarLoop]: Abstraction has 2227 states and 7805 transitions. [2021-02-19 19:31:00,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:00,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 7805 transitions. [2021-02-19 19:31:00,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:31:00,326 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:31:00,326 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:31:00,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable803,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:31:00,526 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:31:00,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:31:00,526 INFO L82 PathProgramCache]: Analyzing trace with hash 197397915, now seen corresponding path program 19 times [2021-02-19 19:31:00,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:31:00,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421877971] [2021-02-19 19:31:00,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:31:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:00,688 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2021-02-19 19:31:00,883 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2021-02-19 19:31:01,096 WARN L202 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-02-19 19:31:01,302 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2021-02-19 19:31:01,458 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 24 [2021-02-19 19:31:01,599 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2021-02-19 19:31:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:01,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421877971] [2021-02-19 19:31:01,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151237534] [2021-02-19 19:31:01,962 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:31:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:31:01,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 19:31:01,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:31:07,070 WARN L202 SmtUtils]: Spent 4.21 s on a formula simplification that was a NOOP. DAG size: 39 [2021-02-19 19:31:11,436 WARN L202 SmtUtils]: Spent 4.23 s on a formula simplification that was a NOOP. DAG size: 58 [2021-02-19 19:31:11,833 INFO L446 ElimStorePlain]: Different costs {5=[v_prenex_69, v_prenex_67], 7=[A, v_prenex_70, v_prenex_68, v_prenex_66]} [2021-02-19 19:31:11,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:11,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:11,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:11,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:11,870 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:31:11,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-02-19 19:31:11,875 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 19:31:12,159 WARN L202 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 19:31:12,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:31:12,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:12,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:12,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:12,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:12,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:31:12,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2021-02-19 19:31:12,202 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-19 19:31:12,472 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 19:31:12,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:31:12,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:12,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:12,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:12,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:12,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:31:12,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-02-19 19:31:12,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-02-19 19:31:12,843 WARN L202 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 19:31:12,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:31:12,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:12,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:12,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:12,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:12,937 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:31:12,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 36 [2021-02-19 19:31:12,966 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-02-19 19:31:13,230 WARN L202 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2021-02-19 19:31:13,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:31:13,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:13,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:13,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:13,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:13,326 INFO L354 Elim1Store]: treesize reduction 12, result has 55.6 percent of original size [2021-02-19 19:31:13,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 24 [2021-02-19 19:31:13,331 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-02-19 19:31:13,607 WARN L202 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-02-19 19:31:13,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:31:13,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:13,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:13,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:13,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 19:31:13,704 INFO L354 Elim1Store]: treesize reduction 14, result has 48.1 percent of original size [2021-02-19 19:31:13,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 22 [2021-02-19 19:31:13,709 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-02-19 19:31:13,947 WARN L202 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-02-19 19:31:13,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 19:31:13,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 6 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-02-19 19:31:13,952 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 12 variables, input treesize:224, output treesize:76 [2021-02-19 19:31:14,259 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2021-02-19 19:31:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:31:14,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:31:14,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-02-19 19:31:14,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434058606] [2021-02-19 19:31:14,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:31:14,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:31:14,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:31:14,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:31:14,330 INFO L87 Difference]: Start difference. First operand 2227 states and 7805 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:31:14,742 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-02-19 19:31:14,911 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-02-19 19:31:15,533 WARN L202 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-02-19 19:31:15,805 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-02-19 19:31:16,172 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 32 [2021-02-19 19:31:16,338 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-02-19 19:31:16,572 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2021-02-19 19:31:21,319 WARN L202 SmtUtils]: Spent 4.45 s on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2021-02-19 19:31:30,657 WARN L202 SmtUtils]: Spent 8.75 s on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-02-19 19:31:31,302 WARN L202 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2021-02-19 19:31:48,851 WARN L202 SmtUtils]: Spent 15.02 s on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2021-02-19 19:31:57,604 WARN L202 SmtUtils]: Spent 8.65 s on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2021-02-19 19:32:06,755 WARN L202 SmtUtils]: Spent 6.75 s on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2021-02-19 19:32:17,537 WARN L202 SmtUtils]: Spent 10.67 s on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-02-19 19:32:22,076 WARN L202 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-02-19 19:32:24,634 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-02-19 19:32:25,302 WARN L202 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-02-19 19:32:25,890 WARN L202 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-02-19 19:32:26,501 WARN L202 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-02-19 19:32:27,068 WARN L202 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-02-19 19:32:27,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:32:27,238 INFO L93 Difference]: Finished difference Result 3131 states and 10706 transitions. [2021-02-19 19:32:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 19:32:27,242 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:32:27,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:32:27,248 INFO L225 Difference]: With dead ends: 3131 [2021-02-19 19:32:27,248 INFO L226 Difference]: Without dead ends: 3116 [2021-02-19 19:32:27,248 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 70.3s TimeCoverageRelationStatistics Valid=331, Invalid=1649, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 19:32:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-02-19 19:32:27,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2243. [2021-02-19 19:32:27,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 3.508920606601249) internal successors, (7867), 2242 states have internal predecessors, (7867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:27,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 7867 transitions. [2021-02-19 19:32:27,281 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 7867 transitions. Word has length 29 [2021-02-19 19:32:27,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:32:27,281 INFO L480 AbstractCegarLoop]: Abstraction has 2243 states and 7867 transitions. [2021-02-19 19:32:27,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 7867 transitions. [2021-02-19 19:32:27,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:32:27,284 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:32:27,284 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:32:27,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable810 [2021-02-19 19:32:27,485 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:32:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:32:27,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1750303277, now seen corresponding path program 36 times [2021-02-19 19:32:27,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:32:27,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557065593] [2021-02-19 19:32:27,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:32:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:27,764 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2021-02-19 19:32:27,925 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-02-19 19:32:28,115 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-02-19 19:32:28,332 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-02-19 19:32:28,528 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-02-19 19:32:28,796 WARN L202 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2021-02-19 19:32:29,036 WARN L202 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-02-19 19:32:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:29,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557065593] [2021-02-19 19:32:29,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955192548] [2021-02-19 19:32:29,365 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:32:29,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:32:29,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:32:29,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 19:32:29,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:32:30,175 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-02-19 19:32:30,417 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-02-19 19:32:31,018 WARN L202 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2021-02-19 19:32:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:31,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:32:31,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 19:32:31,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211523097] [2021-02-19 19:32:31,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:32:31,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:32:31,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:32:31,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:32:31,404 INFO L87 Difference]: Start difference. First operand 2243 states and 7867 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:31,821 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-02-19 19:32:32,522 WARN L202 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-02-19 19:32:33,047 WARN L202 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-02-19 19:32:33,467 WARN L202 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-02-19 19:32:34,024 WARN L202 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2021-02-19 19:32:34,848 WARN L202 SmtUtils]: Spent 688.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-02-19 19:32:35,229 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-02-19 19:32:35,677 WARN L202 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2021-02-19 19:32:36,273 WARN L202 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-02-19 19:32:36,839 WARN L202 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-02-19 19:32:37,249 WARN L202 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-02-19 19:32:37,709 WARN L202 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-02-19 19:32:37,974 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-02-19 19:32:38,421 WARN L202 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-02-19 19:32:39,057 WARN L202 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2021-02-19 19:32:39,760 WARN L202 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-02-19 19:32:40,036 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-02-19 19:32:40,347 WARN L202 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-02-19 19:32:40,965 WARN L202 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2021-02-19 19:32:41,799 WARN L202 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2021-02-19 19:32:42,469 WARN L202 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2021-02-19 19:32:43,157 WARN L202 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2021-02-19 19:32:43,582 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-02-19 19:32:44,575 WARN L202 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-02-19 19:32:45,487 WARN L202 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-02-19 19:32:47,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:32:47,099 INFO L93 Difference]: Finished difference Result 3658 states and 12290 transitions. [2021-02-19 19:32:47,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:32:47,102 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:32:47,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:32:47,108 INFO L225 Difference]: With dead ends: 3658 [2021-02-19 19:32:47,108 INFO L226 Difference]: Without dead ends: 3596 [2021-02-19 19:32:47,108 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=489, Invalid=2163, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 19:32:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3596 states. [2021-02-19 19:32:47,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3596 to 2347. [2021-02-19 19:32:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 3.5089514066496164) internal successors, (8232), 2346 states have internal predecessors, (8232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 8232 transitions. [2021-02-19 19:32:47,149 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 8232 transitions. Word has length 29 [2021-02-19 19:32:47,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:32:47,149 INFO L480 AbstractCegarLoop]: Abstraction has 2347 states and 8232 transitions. [2021-02-19 19:32:47,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:47,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 8232 transitions. [2021-02-19 19:32:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:32:47,153 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:32:47,153 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:32:47,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable832,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:32:47,373 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:32:47,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:32:47,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1428423917, now seen corresponding path program 37 times [2021-02-19 19:32:47,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:32:47,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364580188] [2021-02-19 19:32:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:32:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:47,728 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-02-19 19:32:47,897 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-02-19 19:32:48,060 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 17 [2021-02-19 19:32:48,289 WARN L202 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-02-19 19:32:48,462 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2021-02-19 19:32:48,639 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2021-02-19 19:32:48,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:48,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364580188] [2021-02-19 19:32:48,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25367363] [2021-02-19 19:32:48,948 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:32:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:32:48,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-19 19:32:48,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:32:49,742 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-02-19 19:32:49,991 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-02-19 19:32:50,285 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-02-19 19:32:51,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:32:51,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:32:51,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 19:32:51,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753210793] [2021-02-19 19:32:51,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:32:51,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:32:51,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:32:51,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:32:51,084 INFO L87 Difference]: Start difference. First operand 2347 states and 8232 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:32:51,413 WARN L202 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2021-02-19 19:32:51,603 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 19 [2021-02-19 19:32:51,897 WARN L202 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-02-19 19:32:52,194 WARN L202 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-02-19 19:32:52,663 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-02-19 19:32:53,098 WARN L202 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-02-19 19:32:53,455 WARN L202 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-02-19 19:32:54,087 WARN L202 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-02-19 19:32:54,897 WARN L202 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-02-19 19:32:55,557 WARN L202 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-02-19 19:32:56,045 WARN L202 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-02-19 19:32:56,429 WARN L202 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-02-19 19:32:56,904 WARN L202 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 19:32:57,275 WARN L202 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-02-19 19:32:57,471 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 25 Received shutdown request... [2021-02-19 19:32:58,028 WARN L219 SmtUtils]: Removed 3 from assertion stack [2021-02-19 19:32:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:32:58,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable842 [2021-02-19 19:32:58,229 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 19:32:58,233 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 19:32:58,233 INFO L202 PluginConnector]: Adding new model sorted.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 07:32:58 BasicIcfg [2021-02-19 19:32:58,233 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 19:32:58,234 INFO L168 Benchmark]: Toolchain (without parser) took 562541.81 ms. Allocated memory was 255.9 MB in the beginning and 559.9 MB in the end (delta: 304.1 MB). Free memory was 236.3 MB in the beginning and 422.0 MB in the end (delta: -185.7 MB). Peak memory consumption was 121.2 MB. Max. memory is 16.0 GB. [2021-02-19 19:32:58,234 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:32:58,234 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.32 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:32:58,234 INFO L168 Benchmark]: Boogie Preprocessor took 22.78 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 19:32:58,234 INFO L168 Benchmark]: RCFGBuilder took 358.30 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 234.1 MB in the end (delta: -847.6 kB). Peak memory consumption was 16.1 MB. Max. memory is 16.0 GB. [2021-02-19 19:32:58,234 INFO L168 Benchmark]: TraceAbstraction took 562127.98 ms. Allocated memory was 255.9 MB in the beginning and 559.9 MB in the end (delta: 304.1 MB). Free memory was 233.5 MB in the beginning and 422.0 MB in the end (delta: -188.5 MB). Peak memory consumption was 117.7 MB. Max. memory is 16.0 GB. [2021-02-19 19:32:58,234 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory is still 237.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.32 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 22.78 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 358.30 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 234.1 MB in the end (delta: -847.6 kB). Peak memory consumption was 16.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 562127.98 ms. Allocated memory was 255.9 MB in the beginning and 559.9 MB in the end (delta: 304.1 MB). Free memory was 233.5 MB in the beginning and 422.0 MB in the end (delta: -188.5 MB). Peak memory consumption was 117.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 68). Cancelled while BasicCegarLoop was constructing difference of abstraction (2347states) and FLOYD_HOARE automaton (currently 27 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 49 for 439ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 562.0s, OverallIterations: 94, TraceHistogramMax: 2, AutomataDifference: 443.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3584 SDtfs, 20207 SDslu, 20383 SDs, 0 SdLazy, 31808 SolverSat, 3191 SolverUnsat, 6 SolverUnknown, 0 SolverNotchecked, 33.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4512 GetRequests, 1886 SyntacticMatches, 63 SemanticMatches, 2562 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26589 ImplicationChecksByTransitivity, 461.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2347occurred in iteration=93, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.1s AutomataMinimizationTime, 93 MinimizatonAttempts, 68754 StatesRemovedByMinimization, 93 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 94.8s InterpolantComputationTime, 4834 NumberOfCodeBlocks, 4834 NumberOfCodeBlocksAsserted, 279 NumberOfCheckSat, 4654 ConstructedInterpolants, 48 QuantifiedInterpolants, 1241728 SizeOfPredicates, 348 NumberOfNonLiveVariables, 4996 ConjunctsInSsa, 866 ConjunctsInUnsatCore, 180 InterpolantComputations, 8 PerfectInterpolantSequences, 245/819 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