/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/parallel/misc-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 03:25:59,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 03:25:59,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 03:25:59,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 03:25:59,832 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 [2021-04-15 03:25:59,864 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 03:25:59,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 03:25:59,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 03:25:59,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 03:25:59,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 03:25:59,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 03:25:59,868 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 03:25:59,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 03:25:59,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 03:25:59,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 03:25:59,870 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 03:25:59,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 03:25:59,870 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 03:25:59,870 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 03:25:59,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 03:25:59,870 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 03:25:59,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 03:25:59,870 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 03:25:59,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 03:25:59,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 03:25:59,871 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 03:25:59,871 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 03:25:59,871 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 03:25:59,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 03:25:59,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 03:25:59,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 03:25:59,872 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 03:25:59,872 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 03:25:59,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 03:25:59,872 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 03:25:59,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 03:25:59,872 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 03:26:00,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 03:26:00,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 03:26:00,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 03:26:00,172 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 03:26:00,173 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 03:26:00,174 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl [2021-04-15 03:26:00,174 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/misc-2.wvr.bpl' [2021-04-15 03:26:00,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 03:26:00,214 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 03:26:00,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 03:26:00,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 03:26:00,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 03:26:00,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:26:00" (1/1) ... [2021-04-15 03:26:00,233 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:26:00" (1/1) ... [2021-04-15 03:26:00,241 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 03:26:00,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 03:26:00,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 03:26:00,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 03:26:00,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:26:00" (1/1) ... [2021-04-15 03:26:00,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:26:00" (1/1) ... [2021-04-15 03:26:00,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:26:00" (1/1) ... [2021-04-15 03:26:00,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:26:00" (1/1) ... [2021-04-15 03:26:00,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:26:00" (1/1) ... [2021-04-15 03:26:00,254 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:26:00" (1/1) ... [2021-04-15 03:26:00,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:26:00" (1/1) ... [2021-04-15 03:26:00,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 03:26:00,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 03:26:00,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 03:26:00,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 03:26:00,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:26:00" (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 [2021-04-15 03:26:00,316 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 03:26:00,316 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 03:26:00,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 03:26:00,317 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 03:26:00,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 03:26:00,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 03:26:00,317 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 03:26:00,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 03:26:00,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 03:26:00,318 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 03:26:00,503 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 03:26:00,504 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 03:26:00,505 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:26:00 BoogieIcfgContainer [2021-04-15 03:26:00,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 03:26:00,507 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 03:26:00,507 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 03:26:00,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 03:26:00,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:26:00" (1/2) ... [2021-04-15 03:26:00,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f71af96 and model type misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 03:26:00, skipping insertion in model container [2021-04-15 03:26:00,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:26:00" (2/2) ... [2021-04-15 03:26:00,513 INFO L111 eAbstractionObserver]: Analyzing ICFG misc-2.wvr.bpl [2021-04-15 03:26:00,518 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 03:26:00,518 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 03:26:00,521 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 03:26:00,522 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 03:26:00,552 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-04-15 03:26:00,569 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-15 03:26:00,588 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 03:26:00,588 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 03:26:00,588 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 03:26:00,588 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 03:26:00,588 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 03:26:00,588 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 03:26:00,589 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 03:26:00,589 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 03:26:00,597 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 29 transitions, 74 flow [2021-04-15 03:26:00,613 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 87 states, 85 states have (on average 2.176470588235294) internal successors, (185), 86 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:00,615 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 85 states have (on average 2.176470588235294) internal successors, (185), 86 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:00,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-04-15 03:26:00,622 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:00,623 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:00,623 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:00,628 INFO L82 PathProgramCache]: Analyzing trace with hash -523912972, now seen corresponding path program 1 times [2021-04-15 03:26:00,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:00,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782607655] [2021-04-15 03:26:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:00,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782607655] [2021-04-15 03:26:00,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:26:00,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 03:26:00,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270567685] [2021-04-15 03:26:00,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 03:26:00,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:00,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 03:26:00,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 03:26:00,796 INFO L87 Difference]: Start difference. First operand has 87 states, 85 states have (on average 2.176470588235294) internal successors, (185), 86 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:00,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:00,846 INFO L93 Difference]: Finished difference Result 134 states and 294 transitions. [2021-04-15 03:26:00,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 03:26:00,847 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-04-15 03:26:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:00,857 INFO L225 Difference]: With dead ends: 134 [2021-04-15 03:26:00,857 INFO L226 Difference]: Without dead ends: 127 [2021-04-15 03:26:00,858 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 03:26:00,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-04-15 03:26:00,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2021-04-15 03:26:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.161290322580645) internal successors, (201), 93 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:00,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 201 transitions. [2021-04-15 03:26:00,906 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 201 transitions. Word has length 11 [2021-04-15 03:26:00,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:00,906 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 201 transitions. [2021-04-15 03:26:00,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 201 transitions. [2021-04-15 03:26:00,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 03:26:00,909 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:00,909 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:00,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 03:26:00,909 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:00,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:00,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1655401882, now seen corresponding path program 1 times [2021-04-15 03:26:00,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:00,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753812656] [2021-04-15 03:26:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:00,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753812656] [2021-04-15 03:26:00,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928814837] [2021-04-15 03:26:00,958 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 [2021-04-15 03:26:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:00,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 03:26:00,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:01,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:01,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-04-15 03:26:01,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332773576] [2021-04-15 03:26:01,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 03:26:01,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:01,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 03:26:01,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:26:01,105 INFO L87 Difference]: Start difference. First operand 94 states and 201 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:01,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:01,161 INFO L93 Difference]: Finished difference Result 169 states and 356 transitions. [2021-04-15 03:26:01,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:26:01,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 03:26:01,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:01,163 INFO L225 Difference]: With dead ends: 169 [2021-04-15 03:26:01,163 INFO L226 Difference]: Without dead ends: 169 [2021-04-15 03:26:01,164 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:26:01,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-04-15 03:26:01,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 98. [2021-04-15 03:26:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.185567010309278) internal successors, (212), 97 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:01,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 212 transitions. [2021-04-15 03:26:01,171 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 212 transitions. Word has length 16 [2021-04-15 03:26:01,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:01,171 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 212 transitions. [2021-04-15 03:26:01,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:01,171 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 212 transitions. [2021-04-15 03:26:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 03:26:01,172 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:01,172 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:01,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 03:26:01,391 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:01,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:01,391 INFO L82 PathProgramCache]: Analyzing trace with hash -965799907, now seen corresponding path program 1 times [2021-04-15 03:26:01,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:01,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962486811] [2021-04-15 03:26:01,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:01,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962486811] [2021-04-15 03:26:01,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:26:01,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 03:26:01,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474452037] [2021-04-15 03:26:01,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 03:26:01,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:01,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 03:26:01,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:26:01,428 INFO L87 Difference]: Start difference. First operand 98 states and 212 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:01,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:01,487 INFO L93 Difference]: Finished difference Result 188 states and 400 transitions. [2021-04-15 03:26:01,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:26:01,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 03:26:01,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:01,488 INFO L225 Difference]: With dead ends: 188 [2021-04-15 03:26:01,489 INFO L226 Difference]: Without dead ends: 183 [2021-04-15 03:26:01,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:26:01,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-04-15 03:26:01,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 122. [2021-04-15 03:26:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1735537190082646) internal successors, (263), 121 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:01,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 263 transitions. [2021-04-15 03:26:01,496 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 263 transitions. Word has length 16 [2021-04-15 03:26:01,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:01,496 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 263 transitions. [2021-04-15 03:26:01,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:01,496 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 263 transitions. [2021-04-15 03:26:01,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 03:26:01,497 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:01,497 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:01,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 03:26:01,497 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:01,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:01,498 INFO L82 PathProgramCache]: Analyzing trace with hash 798457899, now seen corresponding path program 2 times [2021-04-15 03:26:01,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:01,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809398446] [2021-04-15 03:26:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:01,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:01,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809398446] [2021-04-15 03:26:01,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:26:01,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 03:26:01,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538471166] [2021-04-15 03:26:01,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 03:26:01,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:01,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 03:26:01,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:26:01,551 INFO L87 Difference]: Start difference. First operand 122 states and 263 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:01,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:01,580 INFO L93 Difference]: Finished difference Result 156 states and 342 transitions. [2021-04-15 03:26:01,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:26:01,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 03:26:01,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:01,582 INFO L225 Difference]: With dead ends: 156 [2021-04-15 03:26:01,582 INFO L226 Difference]: Without dead ends: 156 [2021-04-15 03:26:01,582 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:26:01,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-04-15 03:26:01,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 104. [2021-04-15 03:26:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.174757281553398) internal successors, (224), 103 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2021-04-15 03:26:01,599 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 16 [2021-04-15 03:26:01,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:01,600 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2021-04-15 03:26:01,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:01,600 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2021-04-15 03:26:01,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 03:26:01,601 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:01,601 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:01,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 03:26:01,601 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:01,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1004932738, now seen corresponding path program 2 times [2021-04-15 03:26:01,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:01,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074278257] [2021-04-15 03:26:01,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:01,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074278257] [2021-04-15 03:26:01,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:26:01,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 03:26:01,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555865295] [2021-04-15 03:26:01,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 03:26:01,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:01,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 03:26:01,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:26:01,639 INFO L87 Difference]: Start difference. First operand 104 states and 224 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:01,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:01,666 INFO L93 Difference]: Finished difference Result 156 states and 340 transitions. [2021-04-15 03:26:01,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:26:01,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-04-15 03:26:01,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:01,667 INFO L225 Difference]: With dead ends: 156 [2021-04-15 03:26:01,667 INFO L226 Difference]: Without dead ends: 154 [2021-04-15 03:26:01,667 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:26:01,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-04-15 03:26:01,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 104. [2021-04-15 03:26:01,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.1650485436893203) internal successors, (223), 103 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 223 transitions. [2021-04-15 03:26:01,684 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 223 transitions. Word has length 16 [2021-04-15 03:26:01,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:01,684 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 223 transitions. [2021-04-15 03:26:01,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:01,684 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 223 transitions. [2021-04-15 03:26:01,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:26:01,689 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:01,689 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:01,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 03:26:01,689 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:01,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:01,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1060614677, now seen corresponding path program 1 times [2021-04-15 03:26:01,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:01,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561482040] [2021-04-15 03:26:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:01,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561482040] [2021-04-15 03:26:01,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926970815] [2021-04-15 03:26:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:01,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:26:01,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:01,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:01,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-04-15 03:26:01,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267252857] [2021-04-15 03:26:01,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:26:01,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:01,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:26:01,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:26:01,863 INFO L87 Difference]: Start difference. First operand 104 states and 223 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:01,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:01,996 INFO L93 Difference]: Finished difference Result 226 states and 505 transitions. [2021-04-15 03:26:01,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:26:01,996 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 03:26:01,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:02,001 INFO L225 Difference]: With dead ends: 226 [2021-04-15 03:26:02,002 INFO L226 Difference]: Without dead ends: 226 [2021-04-15 03:26:02,003 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:26:02,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-04-15 03:26:02,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 164. [2021-04-15 03:26:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.2024539877300615) internal successors, (359), 163 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:02,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 359 transitions. [2021-04-15 03:26:02,019 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 359 transitions. Word has length 21 [2021-04-15 03:26:02,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:02,020 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 359 transitions. [2021-04-15 03:26:02,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:02,020 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 359 transitions. [2021-04-15 03:26:02,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:26:02,021 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:02,021 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:02,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:02,237 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:02,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:02,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1348728101, now seen corresponding path program 2 times [2021-04-15 03:26:02,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:02,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670047128] [2021-04-15 03:26:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:02,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:02,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670047128] [2021-04-15 03:26:02,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:26:02,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 03:26:02,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144563490] [2021-04-15 03:26:02,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 03:26:02,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:02,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 03:26:02,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:26:02,266 INFO L87 Difference]: Start difference. First operand 164 states and 359 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:02,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:02,275 INFO L93 Difference]: Finished difference Result 266 states and 560 transitions. [2021-04-15 03:26:02,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 03:26:02,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:26:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:02,278 INFO L225 Difference]: With dead ends: 266 [2021-04-15 03:26:02,278 INFO L226 Difference]: Without dead ends: 266 [2021-04-15 03:26:02,278 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:26:02,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-04-15 03:26:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 234. [2021-04-15 03:26:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.171673819742489) internal successors, (506), 233 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) [2021-04-15 03:26:02,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 506 transitions. [2021-04-15 03:26:02,285 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 506 transitions. Word has length 26 [2021-04-15 03:26:02,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:02,285 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 506 transitions. [2021-04-15 03:26:02,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:02,285 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 506 transitions. [2021-04-15 03:26:02,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:26:02,286 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:02,286 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:02,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-04-15 03:26:02,286 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:02,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:02,287 INFO L82 PathProgramCache]: Analyzing trace with hash -505952581, now seen corresponding path program 1 times [2021-04-15 03:26:02,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:02,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836612867] [2021-04-15 03:26:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:02,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836612867] [2021-04-15 03:26:02,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566098142] [2021-04-15 03:26:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:02,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:26:02,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:02,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:02,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:26:02,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652178434] [2021-04-15 03:26:02,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:26:02,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:02,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:26:02,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:02,459 INFO L87 Difference]: Start difference. First operand 234 states and 506 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:02,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:02,518 INFO L93 Difference]: Finished difference Result 562 states and 1200 transitions. [2021-04-15 03:26:02,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:26:02,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:26:02,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:02,520 INFO L225 Difference]: With dead ends: 562 [2021-04-15 03:26:02,520 INFO L226 Difference]: Without dead ends: 562 [2021-04-15 03:26:02,521 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:26:02,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-04-15 03:26:02,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 438. [2021-04-15 03:26:02,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.265446224256293) internal successors, (990), 437 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 990 transitions. [2021-04-15 03:26:02,532 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 990 transitions. Word has length 26 [2021-04-15 03:26:02,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:02,532 INFO L480 AbstractCegarLoop]: Abstraction has 438 states and 990 transitions. [2021-04-15 03:26:02,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:02,532 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 990 transitions. [2021-04-15 03:26:02,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:26:02,534 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:02,534 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:02,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:02,752 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:02,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:02,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1335579773, now seen corresponding path program 2 times [2021-04-15 03:26:02,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:02,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460375684] [2021-04-15 03:26:02,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:02,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460375684] [2021-04-15 03:26:02,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567542703] [2021-04-15 03:26:02,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:02,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:26:02,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:02,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:26:02,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:02,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:02,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 03:26:02,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974796354] [2021-04-15 03:26:02,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:26:02,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:02,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:26:02,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:26:02,872 INFO L87 Difference]: Start difference. First operand 438 states and 990 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:02,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:02,919 INFO L93 Difference]: Finished difference Result 491 states and 1077 transitions. [2021-04-15 03:26:02,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:26:02,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:26:02,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:02,923 INFO L225 Difference]: With dead ends: 491 [2021-04-15 03:26:02,925 INFO L226 Difference]: Without dead ends: 487 [2021-04-15 03:26:02,925 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:26:02,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-04-15 03:26:02,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 440. [2021-04-15 03:26:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.2574031890660593) internal successors, (991), 439 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:02,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 991 transitions. [2021-04-15 03:26:02,940 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 991 transitions. Word has length 26 [2021-04-15 03:26:02,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:02,942 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 991 transitions. [2021-04-15 03:26:02,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:02,942 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 991 transitions. [2021-04-15 03:26:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:26:02,943 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:02,944 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:03,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:03,159 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:03,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:03,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1641841895, now seen corresponding path program 3 times [2021-04-15 03:26:03,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:03,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553074966] [2021-04-15 03:26:03,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:03,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:03,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553074966] [2021-04-15 03:26:03,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405142965] [2021-04-15 03:26:03,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:03,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:26:03,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:03,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:26:03,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:03,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:03,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 03:26:03,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996390142] [2021-04-15 03:26:03,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:26:03,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:03,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:26:03,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:26:03,288 INFO L87 Difference]: Start difference. First operand 440 states and 991 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:03,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:03,343 INFO L93 Difference]: Finished difference Result 771 states and 1695 transitions. [2021-04-15 03:26:03,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:26:03,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:26:03,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:03,347 INFO L225 Difference]: With dead ends: 771 [2021-04-15 03:26:03,347 INFO L226 Difference]: Without dead ends: 771 [2021-04-15 03:26:03,347 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:26:03,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-04-15 03:26:03,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 634. [2021-04-15 03:26:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.3175355450236967) internal successors, (1467), 633 states have internal predecessors, (1467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:03,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1467 transitions. [2021-04-15 03:26:03,363 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1467 transitions. Word has length 26 [2021-04-15 03:26:03,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:03,363 INFO L480 AbstractCegarLoop]: Abstraction has 634 states and 1467 transitions. [2021-04-15 03:26:03,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1467 transitions. [2021-04-15 03:26:03,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:26:03,365 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:03,365 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:03,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-04-15 03:26:03,569 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:03,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:03,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1483069401, now seen corresponding path program 4 times [2021-04-15 03:26:03,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:03,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629345707] [2021-04-15 03:26:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:03,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629345707] [2021-04-15 03:26:03,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922197637] [2021-04-15 03:26:03,607 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 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 [2021-04-15 03:26:03,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:26:03,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:03,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:26:03,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:03,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:03,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 03:26:03,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809404898] [2021-04-15 03:26:03,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:26:03,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:03,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:26:03,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:26:03,693 INFO L87 Difference]: Start difference. First operand 634 states and 1467 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:03,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:03,734 INFO L93 Difference]: Finished difference Result 763 states and 1678 transitions. [2021-04-15 03:26:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:26:03,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:26:03,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:03,737 INFO L225 Difference]: With dead ends: 763 [2021-04-15 03:26:03,737 INFO L226 Difference]: Without dead ends: 759 [2021-04-15 03:26:03,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:26:03,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-04-15 03:26:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 634. [2021-04-15 03:26:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 2.3143759873617693) internal successors, (1465), 633 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 1465 transitions. [2021-04-15 03:26:03,751 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 1465 transitions. Word has length 26 [2021-04-15 03:26:03,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:03,751 INFO L480 AbstractCegarLoop]: Abstraction has 634 states and 1465 transitions. [2021-04-15 03:26:03,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:03,751 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 1465 transitions. [2021-04-15 03:26:03,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-04-15 03:26:03,753 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:03,753 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:03,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:03,969 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:03,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:03,970 INFO L82 PathProgramCache]: Analyzing trace with hash 275158029, now seen corresponding path program 5 times [2021-04-15 03:26:03,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:03,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683654430] [2021-04-15 03:26:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:04,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683654430] [2021-04-15 03:26:04,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715430564] [2021-04-15 03:26:04,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:04,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:26:04,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:04,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:26:04,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:04,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:04,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:26:04,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413166008] [2021-04-15 03:26:04,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:26:04,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:04,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:26:04,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:04,086 INFO L87 Difference]: Start difference. First operand 634 states and 1465 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:04,146 INFO L93 Difference]: Finished difference Result 741 states and 1639 transitions. [2021-04-15 03:26:04,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:26:04,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-04-15 03:26:04,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:04,149 INFO L225 Difference]: With dead ends: 741 [2021-04-15 03:26:04,149 INFO L226 Difference]: Without dead ends: 721 [2021-04-15 03:26:04,149 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:26:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-04-15 03:26:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 654. [2021-04-15 03:26:04,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 653 states have (on average 2.2833078101071975) internal successors, (1491), 653 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 1491 transitions. [2021-04-15 03:26:04,166 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 1491 transitions. Word has length 26 [2021-04-15 03:26:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:04,166 INFO L480 AbstractCegarLoop]: Abstraction has 654 states and 1491 transitions. [2021-04-15 03:26:04,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:04,166 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 1491 transitions. [2021-04-15 03:26:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 03:26:04,168 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:04,168 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:04,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:04,369 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:04,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:04,369 INFO L82 PathProgramCache]: Analyzing trace with hash 590448310, now seen corresponding path program 6 times [2021-04-15 03:26:04,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:04,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330341117] [2021-04-15 03:26:04,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:04,385 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 03:26:04,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330341117] [2021-04-15 03:26:04,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:26:04,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 03:26:04,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559031666] [2021-04-15 03:26:04,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 03:26:04,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:04,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 03:26:04,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:26:04,387 INFO L87 Difference]: Start difference. First operand 654 states and 1491 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:04,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:04,401 INFO L93 Difference]: Finished difference Result 1106 states and 2391 transitions. [2021-04-15 03:26:04,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 03:26:04,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 03:26:04,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:04,405 INFO L225 Difference]: With dead ends: 1106 [2021-04-15 03:26:04,406 INFO L226 Difference]: Without dead ends: 1106 [2021-04-15 03:26:04,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:26:04,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-04-15 03:26:04,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 1035. [2021-04-15 03:26:04,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 1034 states have (on average 2.2030947775628626) internal successors, (2278), 1034 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:04,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 2278 transitions. [2021-04-15 03:26:04,427 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 2278 transitions. Word has length 31 [2021-04-15 03:26:04,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:04,427 INFO L480 AbstractCegarLoop]: Abstraction has 1035 states and 2278 transitions. [2021-04-15 03:26:04,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:04,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 2278 transitions. [2021-04-15 03:26:04,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 03:26:04,430 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:04,430 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:04,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-04-15 03:26:04,430 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:04,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:04,430 INFO L82 PathProgramCache]: Analyzing trace with hash 655092438, now seen corresponding path program 1 times [2021-04-15 03:26:04,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:04,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919171780] [2021-04-15 03:26:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:26:04,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919171780] [2021-04-15 03:26:04,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273240167] [2021-04-15 03:26:04,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:26:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:04,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:26:04,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:04,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:26:04,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:04,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 03:26:04,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162690988] [2021-04-15 03:26:04,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:26:04,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:04,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:26:04,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:26:04,604 INFO L87 Difference]: Start difference. First operand 1035 states and 2278 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:04,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:04,635 INFO L93 Difference]: Finished difference Result 1734 states and 3766 transitions. [2021-04-15 03:26:04,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:26:04,635 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 03:26:04,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:04,642 INFO L225 Difference]: With dead ends: 1734 [2021-04-15 03:26:04,642 INFO L226 Difference]: Without dead ends: 1715 [2021-04-15 03:26:04,643 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:26:04,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-04-15 03:26:04,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1571. [2021-04-15 03:26:04,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 2.212738853503185) internal successors, (3474), 1570 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 3474 transitions. [2021-04-15 03:26:04,684 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 3474 transitions. Word has length 31 [2021-04-15 03:26:04,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:04,684 INFO L480 AbstractCegarLoop]: Abstraction has 1571 states and 3474 transitions. [2021-04-15 03:26:04,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:04,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 3474 transitions. [2021-04-15 03:26:04,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 03:26:04,687 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:04,687 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:04,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-04-15 03:26:04,905 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:04,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:04,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1389409942, now seen corresponding path program 2 times [2021-04-15 03:26:04,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:04,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241522399] [2021-04-15 03:26:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:26:04,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241522399] [2021-04-15 03:26:04,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193120929] [2021-04-15 03:26:04,954 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:04,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:26:04,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:04,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:26:04,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:26:05,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:05,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 03:26:05,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402779260] [2021-04-15 03:26:05,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:26:05,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:05,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:26:05,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:26:05,028 INFO L87 Difference]: Start difference. First operand 1571 states and 3474 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:05,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:05,059 INFO L93 Difference]: Finished difference Result 2696 states and 5884 transitions. [2021-04-15 03:26:05,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:26:05,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 03:26:05,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:05,068 INFO L225 Difference]: With dead ends: 2696 [2021-04-15 03:26:05,068 INFO L226 Difference]: Without dead ends: 2677 [2021-04-15 03:26:05,069 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:26:05,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-04-15 03:26:05,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2412. [2021-04-15 03:26:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2411 states have (on average 2.2310244711737868) internal successors, (5379), 2411 states have internal predecessors, (5379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 5379 transitions. [2021-04-15 03:26:05,124 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 5379 transitions. Word has length 31 [2021-04-15 03:26:05,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:05,124 INFO L480 AbstractCegarLoop]: Abstraction has 2412 states and 5379 transitions. [2021-04-15 03:26:05,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:05,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 5379 transitions. [2021-04-15 03:26:05,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 03:26:05,129 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:05,129 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:05,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 03:26:05,345 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:05,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1015199406, now seen corresponding path program 3 times [2021-04-15 03:26:05,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:05,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201453098] [2021-04-15 03:26:05,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:05,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201453098] [2021-04-15 03:26:05,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432668731] [2021-04-15 03:26:05,390 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:05,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:26:05,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:05,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:26:05,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:05,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:05,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:26:05,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162921445] [2021-04-15 03:26:05,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:26:05,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:05,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:26:05,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:05,492 INFO L87 Difference]: Start difference. First operand 2412 states and 5379 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:05,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:05,571 INFO L93 Difference]: Finished difference Result 4261 states and 9366 transitions. [2021-04-15 03:26:05,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:26:05,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 03:26:05,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:05,586 INFO L225 Difference]: With dead ends: 4261 [2021-04-15 03:26:05,586 INFO L226 Difference]: Without dead ends: 4236 [2021-04-15 03:26:05,586 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:05,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2021-04-15 03:26:05,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 3410. [2021-04-15 03:26:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3409 states have (on average 2.24435318275154) internal successors, (7651), 3409 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 7651 transitions. [2021-04-15 03:26:05,663 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 7651 transitions. Word has length 31 [2021-04-15 03:26:05,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:05,663 INFO L480 AbstractCegarLoop]: Abstraction has 3410 states and 7651 transitions. [2021-04-15 03:26:05,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:05,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 7651 transitions. [2021-04-15 03:26:05,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 03:26:05,668 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:05,668 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:05,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-04-15 03:26:05,881 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:05,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:05,882 INFO L82 PathProgramCache]: Analyzing trace with hash -2091115922, now seen corresponding path program 4 times [2021-04-15 03:26:05,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:05,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348765787] [2021-04-15 03:26:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:05,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348765787] [2021-04-15 03:26:05,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583346769] [2021-04-15 03:26:05,936 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 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 [2021-04-15 03:26:05,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:26:05,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:05,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:26:05,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:06,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:06,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:26:06,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001500183] [2021-04-15 03:26:06,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:26:06,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:06,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:26:06,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:06,023 INFO L87 Difference]: Start difference. First operand 3410 states and 7651 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:06,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:06,072 INFO L93 Difference]: Finished difference Result 4354 states and 9576 transitions. [2021-04-15 03:26:06,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:26:06,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 03:26:06,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:06,086 INFO L225 Difference]: With dead ends: 4354 [2021-04-15 03:26:06,086 INFO L226 Difference]: Without dead ends: 4335 [2021-04-15 03:26:06,087 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:06,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-04-15 03:26:06,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 3543. [2021-04-15 03:26:06,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3543 states, 3542 states have (on average 2.2478825522303785) internal successors, (7962), 3542 states have internal predecessors, (7962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:06,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3543 states to 3543 states and 7962 transitions. [2021-04-15 03:26:06,157 INFO L78 Accepts]: Start accepts. Automaton has 3543 states and 7962 transitions. Word has length 31 [2021-04-15 03:26:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:06,158 INFO L480 AbstractCegarLoop]: Abstraction has 3543 states and 7962 transitions. [2021-04-15 03:26:06,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3543 states and 7962 transitions. [2021-04-15 03:26:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 03:26:06,164 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:06,164 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:06,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-04-15 03:26:06,377 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:06,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:06,377 INFO L82 PathProgramCache]: Analyzing trace with hash 702036756, now seen corresponding path program 5 times [2021-04-15 03:26:06,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:06,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398762033] [2021-04-15 03:26:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:26:06,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398762033] [2021-04-15 03:26:06,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929809847] [2021-04-15 03:26:06,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:26:06,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:26:06,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:06,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:26:06,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:06,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:26:06,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:06,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 03:26:06,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867714994] [2021-04-15 03:26:06,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:26:06,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:06,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:26:06,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:26:06,484 INFO L87 Difference]: Start difference. First operand 3543 states and 7962 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:06,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:06,520 INFO L93 Difference]: Finished difference Result 4170 states and 9274 transitions. [2021-04-15 03:26:06,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:26:06,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 03:26:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:06,543 INFO L225 Difference]: With dead ends: 4170 [2021-04-15 03:26:06,543 INFO L226 Difference]: Without dead ends: 4151 [2021-04-15 03:26:06,543 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:26:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-04-15 03:26:06,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3929. [2021-04-15 03:26:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3928 states have (on average 2.253818737270876) internal successors, (8853), 3928 states have internal predecessors, (8853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:06,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 8853 transitions. [2021-04-15 03:26:06,615 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 8853 transitions. Word has length 31 [2021-04-15 03:26:06,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:06,615 INFO L480 AbstractCegarLoop]: Abstraction has 3929 states and 8853 transitions. [2021-04-15 03:26:06,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:06,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 8853 transitions. [2021-04-15 03:26:06,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 03:26:06,620 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:06,620 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:06,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-15 03:26:06,833 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:06,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:06,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1049711310, now seen corresponding path program 6 times [2021-04-15 03:26:06,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:06,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347207662] [2021-04-15 03:26:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:06,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:06,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347207662] [2021-04-15 03:26:06,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567466460] [2021-04-15 03:26:06,886 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:26:06,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:26:06,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:06,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:06,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:06,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:06,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:26:06,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361261922] [2021-04-15 03:26:06,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:26:06,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:06,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:26:06,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:06,977 INFO L87 Difference]: Start difference. First operand 3929 states and 8853 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:07,033 INFO L93 Difference]: Finished difference Result 5348 states and 11836 transitions. [2021-04-15 03:26:07,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:26:07,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 03:26:07,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:07,042 INFO L225 Difference]: With dead ends: 5348 [2021-04-15 03:26:07,042 INFO L226 Difference]: Without dead ends: 5329 [2021-04-15 03:26:07,043 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:07,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-04-15 03:26:07,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 4092. [2021-04-15 03:26:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4092 states, 4091 states have (on average 2.2561720850647764) internal successors, (9230), 4091 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4092 states to 4092 states and 9230 transitions. [2021-04-15 03:26:07,155 INFO L78 Accepts]: Start accepts. Automaton has 4092 states and 9230 transitions. Word has length 31 [2021-04-15 03:26:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:07,155 INFO L480 AbstractCegarLoop]: Abstraction has 4092 states and 9230 transitions. [2021-04-15 03:26:07,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 4092 states and 9230 transitions. [2021-04-15 03:26:07,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-04-15 03:26:07,160 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:07,160 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:07,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:07,374 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:07,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:07,375 INFO L82 PathProgramCache]: Analyzing trace with hash -2056604018, now seen corresponding path program 7 times [2021-04-15 03:26:07,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:07,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732532938] [2021-04-15 03:26:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:07,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732532938] [2021-04-15 03:26:07,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234022073] [2021-04-15 03:26:07,409 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 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 [2021-04-15 03:26:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:07,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:26:07,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:07,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:07,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:07,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:26:07,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737597801] [2021-04-15 03:26:07,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:26:07,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:07,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:26:07,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:07,479 INFO L87 Difference]: Start difference. First operand 4092 states and 9230 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:07,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:07,528 INFO L93 Difference]: Finished difference Result 5419 states and 11952 transitions. [2021-04-15 03:26:07,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:26:07,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-04-15 03:26:07,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:07,537 INFO L225 Difference]: With dead ends: 5419 [2021-04-15 03:26:07,538 INFO L226 Difference]: Without dead ends: 5400 [2021-04-15 03:26:07,538 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:07,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2021-04-15 03:26:07,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 2885. [2021-04-15 03:26:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 2884 states have (on average 2.235090152565881) internal successors, (6446), 2884 states have internal predecessors, (6446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:07,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 6446 transitions. [2021-04-15 03:26:07,588 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 6446 transitions. Word has length 31 [2021-04-15 03:26:07,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:07,589 INFO L480 AbstractCegarLoop]: Abstraction has 2885 states and 6446 transitions. [2021-04-15 03:26:07,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:07,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 6446 transitions. [2021-04-15 03:26:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:26:07,592 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:07,592 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:07,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:07,809 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:07,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:07,809 INFO L82 PathProgramCache]: Analyzing trace with hash 467136390, now seen corresponding path program 8 times [2021-04-15 03:26:07,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:07,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687582448] [2021-04-15 03:26:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:07,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687582448] [2021-04-15 03:26:07,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007462693] [2021-04-15 03:26:07,849 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 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 [2021-04-15 03:26:07,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:26:07,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:07,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:26:07,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:07,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:07,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:07,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971594804] [2021-04-15 03:26:07,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:07,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:07,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:07,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:07,932 INFO L87 Difference]: Start difference. First operand 2885 states and 6446 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:08,025 INFO L93 Difference]: Finished difference Result 5635 states and 12327 transitions. [2021-04-15 03:26:08,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:26:08,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:26:08,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:08,034 INFO L225 Difference]: With dead ends: 5635 [2021-04-15 03:26:08,034 INFO L226 Difference]: Without dead ends: 5635 [2021-04-15 03:26:08,034 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:08,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5635 states. [2021-04-15 03:26:08,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5635 to 3879. [2021-04-15 03:26:08,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3879 states, 3878 states have (on average 2.2439401753481176) internal successors, (8702), 3878 states have internal predecessors, (8702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:08,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 8702 transitions. [2021-04-15 03:26:08,096 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 8702 transitions. Word has length 36 [2021-04-15 03:26:08,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:08,096 INFO L480 AbstractCegarLoop]: Abstraction has 3879 states and 8702 transitions. [2021-04-15 03:26:08,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:08,096 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 8702 transitions. [2021-04-15 03:26:08,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:26:08,101 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:08,101 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:08,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-04-15 03:26:08,309 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:08,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:08,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1694057605, now seen corresponding path program 9 times [2021-04-15 03:26:08,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:08,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811530832] [2021-04-15 03:26:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:08,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811530832] [2021-04-15 03:26:08,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748869036] [2021-04-15 03:26:08,356 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 [2021-04-15 03:26:08,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:26:08,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:08,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:26:08,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:08,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:08,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:08,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969651175] [2021-04-15 03:26:08,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:08,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:08,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:08,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:08,436 INFO L87 Difference]: Start difference. First operand 3879 states and 8702 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:08,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:08,557 INFO L93 Difference]: Finished difference Result 7170 states and 15945 transitions. [2021-04-15 03:26:08,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:26:08,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:26:08,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:08,572 INFO L225 Difference]: With dead ends: 7170 [2021-04-15 03:26:08,573 INFO L226 Difference]: Without dead ends: 7072 [2021-04-15 03:26:08,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:08,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7072 states. [2021-04-15 03:26:08,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7072 to 6656. [2021-04-15 03:26:08,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6656 states, 6655 states have (on average 2.251089406461307) internal successors, (14981), 6655 states have internal predecessors, (14981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:08,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6656 states to 6656 states and 14981 transitions. [2021-04-15 03:26:08,669 INFO L78 Accepts]: Start accepts. Automaton has 6656 states and 14981 transitions. Word has length 36 [2021-04-15 03:26:08,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:08,669 INFO L480 AbstractCegarLoop]: Abstraction has 6656 states and 14981 transitions. [2021-04-15 03:26:08,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:08,669 INFO L276 IsEmpty]: Start isEmpty. Operand 6656 states and 14981 transitions. [2021-04-15 03:26:08,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:26:08,675 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:08,676 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:08,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:08,889 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:08,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:08,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1866861137, now seen corresponding path program 10 times [2021-04-15 03:26:08,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:08,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518184420] [2021-04-15 03:26:08,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:08,918 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:08,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518184420] [2021-04-15 03:26:08,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233614306] [2021-04-15 03:26:08,918 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 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 [2021-04-15 03:26:08,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:26:08,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:08,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:26:08,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:08,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:08,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:26:08,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486611149] [2021-04-15 03:26:08,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:26:08,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:08,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:26:08,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:08,999 INFO L87 Difference]: Start difference. First operand 6656 states and 14981 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-04-15 03:26:09,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:09,067 INFO L93 Difference]: Finished difference Result 6984 states and 15407 transitions. [2021-04-15 03:26:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:26:09,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-04-15 03:26:09,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:09,078 INFO L225 Difference]: With dead ends: 6984 [2021-04-15 03:26:09,078 INFO L226 Difference]: Without dead ends: 6984 [2021-04-15 03:26:09,079 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:26:09,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6984 states. [2021-04-15 03:26:09,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6984 to 6596. [2021-04-15 03:26:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.234571645185747) internal successors, (14737), 6595 states have internal predecessors, (14737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:09,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 14737 transitions. [2021-04-15 03:26:09,179 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 14737 transitions. Word has length 36 [2021-04-15 03:26:09,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:09,180 INFO L480 AbstractCegarLoop]: Abstraction has 6596 states and 14737 transitions. [2021-04-15 03:26:09,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-04-15 03:26:09,180 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 14737 transitions. [2021-04-15 03:26:09,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:26:09,186 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:09,186 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:09,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-15 03:26:09,403 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:09,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:09,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1660386298, now seen corresponding path program 11 times [2021-04-15 03:26:09,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:09,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726049782] [2021-04-15 03:26:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:09,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726049782] [2021-04-15 03:26:09,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123673977] [2021-04-15 03:26:09,446 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 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 [2021-04-15 03:26:09,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 03:26:09,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:09,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:26:09,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:09,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:09,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:26:09,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759946691] [2021-04-15 03:26:09,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:26:09,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:09,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:26:09,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:09,520 INFO L87 Difference]: Start difference. First operand 6596 states and 14737 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-04-15 03:26:09,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:09,615 INFO L93 Difference]: Finished difference Result 7018 states and 15447 transitions. [2021-04-15 03:26:09,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:26:09,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-04-15 03:26:09,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:09,624 INFO L225 Difference]: With dead ends: 7018 [2021-04-15 03:26:09,625 INFO L226 Difference]: Without dead ends: 7014 [2021-04-15 03:26:09,625 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:26:09,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7014 states. [2021-04-15 03:26:09,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7014 to 6152. [2021-04-15 03:26:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6152 states, 6151 states have (on average 2.238497805234921) internal successors, (13769), 6151 states have internal predecessors, (13769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6152 states to 6152 states and 13769 transitions. [2021-04-15 03:26:09,710 INFO L78 Accepts]: Start accepts. Automaton has 6152 states and 13769 transitions. Word has length 36 [2021-04-15 03:26:09,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:09,710 INFO L480 AbstractCegarLoop]: Abstraction has 6152 states and 13769 transitions. [2021-04-15 03:26:09,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-04-15 03:26:09,710 INFO L276 IsEmpty]: Start isEmpty. Operand 6152 states and 13769 transitions. [2021-04-15 03:26:09,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:26:09,715 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:09,715 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:09,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-04-15 03:26:09,931 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:09,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:09,932 INFO L82 PathProgramCache]: Analyzing trace with hash -542761274, now seen corresponding path program 12 times [2021-04-15 03:26:09,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:09,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83286868] [2021-04-15 03:26:09,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:09,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83286868] [2021-04-15 03:26:09,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616946618] [2021-04-15 03:26:09,955 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:26:09,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:26:09,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:09,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:26:09,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:10,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:10,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:26:10,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591761686] [2021-04-15 03:26:10,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:26:10,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:10,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:26:10,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:10,034 INFO L87 Difference]: Start difference. First operand 6152 states and 13769 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-04-15 03:26:10,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:10,107 INFO L93 Difference]: Finished difference Result 9612 states and 21128 transitions. [2021-04-15 03:26:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:26:10,108 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-04-15 03:26:10,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:10,123 INFO L225 Difference]: With dead ends: 9612 [2021-04-15 03:26:10,123 INFO L226 Difference]: Without dead ends: 9612 [2021-04-15 03:26:10,123 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:26:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9612 states. [2021-04-15 03:26:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9612 to 8560. [2021-04-15 03:26:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8560 states, 8559 states have (on average 2.2475756513611405) internal successors, (19237), 8559 states have internal predecessors, (19237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:10,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8560 states to 8560 states and 19237 transitions. [2021-04-15 03:26:10,270 INFO L78 Accepts]: Start accepts. Automaton has 8560 states and 19237 transitions. Word has length 36 [2021-04-15 03:26:10,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:10,271 INFO L480 AbstractCegarLoop]: Abstraction has 8560 states and 19237 transitions. [2021-04-15 03:26:10,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-04-15 03:26:10,272 INFO L276 IsEmpty]: Start isEmpty. Operand 8560 states and 19237 transitions. [2021-04-15 03:26:10,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:26:10,279 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:10,280 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:10,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 03:26:10,493 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:10,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:10,493 INFO L82 PathProgramCache]: Analyzing trace with hash 452193595, now seen corresponding path program 13 times [2021-04-15 03:26:10,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:10,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214538173] [2021-04-15 03:26:10,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:10,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214538173] [2021-04-15 03:26:10,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838763499] [2021-04-15 03:26:10,518 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 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 [2021-04-15 03:26:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:10,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:26:10,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:10,593 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:10,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:10,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:26:10,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424236170] [2021-04-15 03:26:10,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:26:10,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:10,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:26:10,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:10,595 INFO L87 Difference]: Start difference. First operand 8560 states and 19237 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-04-15 03:26:10,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:10,704 INFO L93 Difference]: Finished difference Result 10199 states and 22770 transitions. [2021-04-15 03:26:10,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:26:10,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-04-15 03:26:10,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:10,714 INFO L225 Difference]: With dead ends: 10199 [2021-04-15 03:26:10,714 INFO L226 Difference]: Without dead ends: 10193 [2021-04-15 03:26:10,715 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:26:10,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10193 states. [2021-04-15 03:26:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10193 to 9772. [2021-04-15 03:26:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9772 states, 9771 states have (on average 2.2569849554805037) internal successors, (22053), 9771 states have internal predecessors, (22053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9772 states to 9772 states and 22053 transitions. [2021-04-15 03:26:10,892 INFO L78 Accepts]: Start accepts. Automaton has 9772 states and 22053 transitions. Word has length 36 [2021-04-15 03:26:10,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:10,893 INFO L480 AbstractCegarLoop]: Abstraction has 9772 states and 22053 transitions. [2021-04-15 03:26:10,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-04-15 03:26:10,893 INFO L276 IsEmpty]: Start isEmpty. Operand 9772 states and 22053 transitions. [2021-04-15 03:26:10,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:26:10,901 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:10,902 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:11,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-04-15 03:26:11,117 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:11,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:11,117 INFO L82 PathProgramCache]: Analyzing trace with hash 756919215, now seen corresponding path program 14 times [2021-04-15 03:26:11,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:11,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491468346] [2021-04-15 03:26:11,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:11,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491468346] [2021-04-15 03:26:11,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739960060] [2021-04-15 03:26:11,142 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:26:11,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:26:11,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:11,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:26:11,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:11,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:11,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:26:11,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883396382] [2021-04-15 03:26:11,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:26:11,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:11,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:26:11,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:11,217 INFO L87 Difference]: Start difference. First operand 9772 states and 22053 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-04-15 03:26:11,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:11,294 INFO L93 Difference]: Finished difference Result 10439 states and 23230 transitions. [2021-04-15 03:26:11,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:26:11,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-04-15 03:26:11,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:11,307 INFO L225 Difference]: With dead ends: 10439 [2021-04-15 03:26:11,307 INFO L226 Difference]: Without dead ends: 10437 [2021-04-15 03:26:11,307 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:26:11,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10437 states. [2021-04-15 03:26:11,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10437 to 9840. [2021-04-15 03:26:11,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9840 states, 9839 states have (on average 2.252363045024901) internal successors, (22161), 9839 states have internal predecessors, (22161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:11,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9840 states to 9840 states and 22161 transitions. [2021-04-15 03:26:11,461 INFO L78 Accepts]: Start accepts. Automaton has 9840 states and 22161 transitions. Word has length 36 [2021-04-15 03:26:11,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:11,461 INFO L480 AbstractCegarLoop]: Abstraction has 9840 states and 22161 transitions. [2021-04-15 03:26:11,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-04-15 03:26:11,461 INFO L276 IsEmpty]: Start isEmpty. Operand 9840 states and 22161 transitions. [2021-04-15 03:26:11,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:26:11,469 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:11,469 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:11,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-04-15 03:26:11,670 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:11,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:11,670 INFO L82 PathProgramCache]: Analyzing trace with hash 963394054, now seen corresponding path program 15 times [2021-04-15 03:26:11,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:11,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929812977] [2021-04-15 03:26:11,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:11,763 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:11,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929812977] [2021-04-15 03:26:11,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251257017] [2021-04-15 03:26:11,764 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 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 [2021-04-15 03:26:11,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:26:11,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:11,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:26:11,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 03:26:11,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:11,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-04-15 03:26:11,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139936318] [2021-04-15 03:26:11,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:26:11,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:11,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:26:11,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:26:11,874 INFO L87 Difference]: Start difference. First operand 9840 states and 22161 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:12,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:12,232 INFO L93 Difference]: Finished difference Result 16933 states and 36602 transitions. [2021-04-15 03:26:12,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 03:26:12,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:26:12,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:12,258 INFO L225 Difference]: With dead ends: 16933 [2021-04-15 03:26:12,258 INFO L226 Difference]: Without dead ends: 16887 [2021-04-15 03:26:12,259 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 260.5ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-04-15 03:26:12,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16887 states. [2021-04-15 03:26:12,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16887 to 11694. [2021-04-15 03:26:12,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11694 states, 11693 states have (on average 2.213033438809544) internal successors, (25877), 11693 states have internal predecessors, (25877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:12,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11694 states to 11694 states and 25877 transitions. [2021-04-15 03:26:12,448 INFO L78 Accepts]: Start accepts. Automaton has 11694 states and 25877 transitions. Word has length 36 [2021-04-15 03:26:12,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:12,448 INFO L480 AbstractCegarLoop]: Abstraction has 11694 states and 25877 transitions. [2021-04-15 03:26:12,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 10 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:12,448 INFO L276 IsEmpty]: Start isEmpty. Operand 11694 states and 25877 transitions. [2021-04-15 03:26:12,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:26:12,456 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:12,456 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:12,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:12,666 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:12,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:12,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1147123141, now seen corresponding path program 16 times [2021-04-15 03:26:12,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:12,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490529928] [2021-04-15 03:26:12,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:12,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490529928] [2021-04-15 03:26:12,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062103925] [2021-04-15 03:26:12,690 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:12,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:26:12,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:12,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:26:12,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:12,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:12,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:26:12,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345919450] [2021-04-15 03:26:12,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:26:12,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:12,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:26:12,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:26:12,834 INFO L87 Difference]: Start difference. First operand 11694 states and 25877 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:12,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:12,927 INFO L93 Difference]: Finished difference Result 12577 states and 27332 transitions. [2021-04-15 03:26:12,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:26:12,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:26:12,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:12,945 INFO L225 Difference]: With dead ends: 12577 [2021-04-15 03:26:12,945 INFO L226 Difference]: Without dead ends: 12575 [2021-04-15 03:26:12,945 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:26:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12575 states. [2021-04-15 03:26:13,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12575 to 11238. [2021-04-15 03:26:13,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11238 states, 11237 states have (on average 2.20352407226128) internal successors, (24761), 11237 states have internal predecessors, (24761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11238 states to 11238 states and 24761 transitions. [2021-04-15 03:26:13,113 INFO L78 Accepts]: Start accepts. Automaton has 11238 states and 24761 transitions. Word has length 36 [2021-04-15 03:26:13,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:13,113 INFO L480 AbstractCegarLoop]: Abstraction has 11238 states and 24761 transitions. [2021-04-15 03:26:13,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:13,114 INFO L276 IsEmpty]: Start isEmpty. Operand 11238 states and 24761 transitions. [2021-04-15 03:26:13,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:26:13,119 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:13,120 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:13,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 03:26:13,320 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:13,321 INFO L82 PathProgramCache]: Analyzing trace with hash 973386407, now seen corresponding path program 17 times [2021-04-15 03:26:13,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:13,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758148276] [2021-04-15 03:26:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:13,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 03:26:13,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758148276] [2021-04-15 03:26:13,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990945526] [2021-04-15 03:26:13,351 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 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 [2021-04-15 03:26:13,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:26:13,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:13,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:26:13,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:13,412 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 03:26:13,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:13,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:26:13,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402992204] [2021-04-15 03:26:13,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:26:13,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:13,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:26:13,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:26:13,414 INFO L87 Difference]: Start difference. First operand 11238 states and 24761 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:13,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:13,510 INFO L93 Difference]: Finished difference Result 11745 states and 25558 transitions. [2021-04-15 03:26:13,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:26:13,510 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:26:13,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:13,526 INFO L225 Difference]: With dead ends: 11745 [2021-04-15 03:26:13,526 INFO L226 Difference]: Without dead ends: 11709 [2021-04-15 03:26:13,527 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:26:13,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11709 states. [2021-04-15 03:26:13,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11709 to 11232. [2021-04-15 03:26:13,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11232 states, 11231 states have (on average 2.19740005342356) internal successors, (24679), 11231 states have internal predecessors, (24679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:13,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11232 states to 11232 states and 24679 transitions. [2021-04-15 03:26:13,717 INFO L78 Accepts]: Start accepts. Automaton has 11232 states and 24679 transitions. Word has length 36 [2021-04-15 03:26:13,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:13,717 INFO L480 AbstractCegarLoop]: Abstraction has 11232 states and 24679 transitions. [2021-04-15 03:26:13,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:13,718 INFO L276 IsEmpty]: Start isEmpty. Operand 11232 states and 24679 transitions. [2021-04-15 03:26:13,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:26:13,723 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:13,723 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:13,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:13,931 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:13,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:13,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1610257349, now seen corresponding path program 18 times [2021-04-15 03:26:13,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:13,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679431286] [2021-04-15 03:26:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:13,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679431286] [2021-04-15 03:26:13,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314011175] [2021-04-15 03:26:13,951 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 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 [2021-04-15 03:26:13,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:26:13,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:13,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:26:13,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:14,039 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:14,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:14,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:26:14,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856347068] [2021-04-15 03:26:14,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:26:14,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:14,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:26:14,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:14,041 INFO L87 Difference]: Start difference. First operand 11232 states and 24679 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-04-15 03:26:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:14,123 INFO L93 Difference]: Finished difference Result 13428 states and 29318 transitions. [2021-04-15 03:26:14,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:26:14,124 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-04-15 03:26:14,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:14,138 INFO L225 Difference]: With dead ends: 13428 [2021-04-15 03:26:14,138 INFO L226 Difference]: Without dead ends: 13422 [2021-04-15 03:26:14,138 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:26:14,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13422 states. [2021-04-15 03:26:14,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13422 to 12944. [2021-04-15 03:26:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12944 states, 12943 states have (on average 2.2074480414123463) internal successors, (28571), 12943 states have internal predecessors, (28571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12944 states to 12944 states and 28571 transitions. [2021-04-15 03:26:14,303 INFO L78 Accepts]: Start accepts. Automaton has 12944 states and 28571 transitions. Word has length 36 [2021-04-15 03:26:14,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:14,304 INFO L480 AbstractCegarLoop]: Abstraction has 12944 states and 28571 transitions. [2021-04-15 03:26:14,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-04-15 03:26:14,304 INFO L276 IsEmpty]: Start isEmpty. Operand 12944 states and 28571 transitions. [2021-04-15 03:26:14,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:26:14,310 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:14,310 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:14,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-04-15 03:26:14,515 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:14,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:14,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1305531729, now seen corresponding path program 19 times [2021-04-15 03:26:14,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:14,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895843002] [2021-04-15 03:26:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:14,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895843002] [2021-04-15 03:26:14,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196665586] [2021-04-15 03:26:14,541 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 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 [2021-04-15 03:26:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:14,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:26:14,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:14,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:14,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:26:14,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302542762] [2021-04-15 03:26:14,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:26:14,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:14,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:26:14,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:26:14,632 INFO L87 Difference]: Start difference. First operand 12944 states and 28571 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-04-15 03:26:14,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:14,757 INFO L93 Difference]: Finished difference Result 13864 states and 30236 transitions. [2021-04-15 03:26:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:26:14,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 36 [2021-04-15 03:26:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:14,771 INFO L225 Difference]: With dead ends: 13864 [2021-04-15 03:26:14,771 INFO L226 Difference]: Without dead ends: 13864 [2021-04-15 03:26:14,772 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:26:14,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13864 states. [2021-04-15 03:26:14,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13864 to 12976. [2021-04-15 03:26:14,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12976 states, 12975 states have (on average 2.206936416184971) internal successors, (28635), 12975 states have internal predecessors, (28635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:14,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12976 states to 12976 states and 28635 transitions. [2021-04-15 03:26:14,957 INFO L78 Accepts]: Start accepts. Automaton has 12976 states and 28635 transitions. Word has length 36 [2021-04-15 03:26:14,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:14,957 INFO L480 AbstractCegarLoop]: Abstraction has 12976 states and 28635 transitions. [2021-04-15 03:26:14,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-04-15 03:26:14,958 INFO L276 IsEmpty]: Start isEmpty. Operand 12976 states and 28635 transitions. [2021-04-15 03:26:14,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:26:14,964 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:14,964 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:15,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:15,165 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:15,165 INFO L82 PathProgramCache]: Analyzing trace with hash -915327803, now seen corresponding path program 20 times [2021-04-15 03:26:15,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:15,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676451762] [2021-04-15 03:26:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:15,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676451762] [2021-04-15 03:26:15,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825642463] [2021-04-15 03:26:15,191 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 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 [2021-04-15 03:26:15,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:26:15,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:15,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:26:15,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:15,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:15,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:26:15,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174153934] [2021-04-15 03:26:15,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:26:15,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:15,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:26:15,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:26:15,274 INFO L87 Difference]: Start difference. First operand 12976 states and 28635 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:15,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:15,378 INFO L93 Difference]: Finished difference Result 14564 states and 31706 transitions. [2021-04-15 03:26:15,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:26:15,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:26:15,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:15,393 INFO L225 Difference]: With dead ends: 14564 [2021-04-15 03:26:15,393 INFO L226 Difference]: Without dead ends: 14564 [2021-04-15 03:26:15,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:26:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14564 states. [2021-04-15 03:26:15,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14564 to 13136. [2021-04-15 03:26:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13136 states, 13135 states have (on average 2.204415683288923) internal successors, (28955), 13135 states have internal predecessors, (28955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13136 states to 13136 states and 28955 transitions. [2021-04-15 03:26:15,567 INFO L78 Accepts]: Start accepts. Automaton has 13136 states and 28955 transitions. Word has length 36 [2021-04-15 03:26:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:15,567 INFO L480 AbstractCegarLoop]: Abstraction has 13136 states and 28955 transitions. [2021-04-15 03:26:15,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:15,567 INFO L276 IsEmpty]: Start isEmpty. Operand 13136 states and 28955 transitions. [2021-04-15 03:26:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-04-15 03:26:15,573 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:15,573 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:15,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-04-15 03:26:15,774 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:15,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:15,774 INFO L82 PathProgramCache]: Analyzing trace with hash 537537127, now seen corresponding path program 21 times [2021-04-15 03:26:15,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:15,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002969140] [2021-04-15 03:26:15,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:15,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002969140] [2021-04-15 03:26:15,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142013244] [2021-04-15 03:26:15,804 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 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 [2021-04-15 03:26:15,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 03:26:15,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:15,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:26:15,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:15,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:15,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:15,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311440372] [2021-04-15 03:26:15,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:15,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:15,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:15,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:15,876 INFO L87 Difference]: Start difference. First operand 13136 states and 28955 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:15,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:15,990 INFO L93 Difference]: Finished difference Result 14130 states and 30823 transitions. [2021-04-15 03:26:15,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:26:15,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-04-15 03:26:15,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:16,011 INFO L225 Difference]: With dead ends: 14130 [2021-04-15 03:26:16,011 INFO L226 Difference]: Without dead ends: 14130 [2021-04-15 03:26:16,011 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:16,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14130 states. [2021-04-15 03:26:16,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14130 to 12516. [2021-04-15 03:26:16,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12516 states, 12515 states have (on average 2.204314822213344) internal successors, (27587), 12515 states have internal predecessors, (27587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:16,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12516 states to 12516 states and 27587 transitions. [2021-04-15 03:26:16,200 INFO L78 Accepts]: Start accepts. Automaton has 12516 states and 27587 transitions. Word has length 36 [2021-04-15 03:26:16,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:16,200 INFO L480 AbstractCegarLoop]: Abstraction has 12516 states and 27587 transitions. [2021-04-15 03:26:16,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:16,200 INFO L276 IsEmpty]: Start isEmpty. Operand 12516 states and 27587 transitions. [2021-04-15 03:26:16,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 03:26:16,211 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:16,211 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:16,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:16,417 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:16,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:16,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1450078555, now seen corresponding path program 22 times [2021-04-15 03:26:16,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:16,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390550079] [2021-04-15 03:26:16,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:16,462 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:16,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390550079] [2021-04-15 03:26:16,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56905055] [2021-04-15 03:26:16,462 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 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 [2021-04-15 03:26:16,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:26:16,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:16,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:26:16,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:16,546 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:16,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:16,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:26:16,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442732223] [2021-04-15 03:26:16,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:26:16,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:16,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:26:16,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:26:16,548 INFO L87 Difference]: Start difference. First operand 12516 states and 27587 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2021-04-15 03:26:16,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:16,686 INFO L93 Difference]: Finished difference Result 15926 states and 34731 transitions. [2021-04-15 03:26:16,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:26:16,686 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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 46 [2021-04-15 03:26:16,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:16,703 INFO L225 Difference]: With dead ends: 15926 [2021-04-15 03:26:16,703 INFO L226 Difference]: Without dead ends: 15926 [2021-04-15 03:26:16,703 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:26:16,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15926 states. [2021-04-15 03:26:16,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15926 to 13120. [2021-04-15 03:26:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13120 states, 13119 states have (on average 2.2095434103209084) internal successors, (28987), 13119 states have internal predecessors, (28987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:16,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13120 states to 13120 states and 28987 transitions. [2021-04-15 03:26:16,864 INFO L78 Accepts]: Start accepts. Automaton has 13120 states and 28987 transitions. Word has length 46 [2021-04-15 03:26:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:16,864 INFO L480 AbstractCegarLoop]: Abstraction has 13120 states and 28987 transitions. [2021-04-15 03:26:16,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 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) [2021-04-15 03:26:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 13120 states and 28987 transitions. [2021-04-15 03:26:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 03:26:16,875 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:16,876 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:17,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-04-15 03:26:17,089 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:17,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:17,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1917671971, now seen corresponding path program 23 times [2021-04-15 03:26:17,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:17,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327824052] [2021-04-15 03:26:17,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:17,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327824052] [2021-04-15 03:26:17,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318632271] [2021-04-15 03:26:17,114 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 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 [2021-04-15 03:26:17,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:26:17,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:17,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:26:17,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:17,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:17,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:26:17,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221215931] [2021-04-15 03:26:17,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:26:17,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:17,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:26:17,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:26:17,193 INFO L87 Difference]: Start difference. First operand 13120 states and 28987 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-04-15 03:26:17,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:17,284 INFO L93 Difference]: Finished difference Result 13630 states and 29839 transitions. [2021-04-15 03:26:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:26:17,284 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-04-15 03:26:17,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:17,305 INFO L225 Difference]: With dead ends: 13630 [2021-04-15 03:26:17,305 INFO L226 Difference]: Without dead ends: 13622 [2021-04-15 03:26:17,306 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:26:17,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13622 states. [2021-04-15 03:26:17,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13622 to 13056. [2021-04-15 03:26:17,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13056 states, 13055 states have (on average 2.2050555342780545) internal successors, (28787), 13055 states have internal predecessors, (28787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13056 states to 13056 states and 28787 transitions. [2021-04-15 03:26:17,562 INFO L78 Accepts]: Start accepts. Automaton has 13056 states and 28787 transitions. Word has length 46 [2021-04-15 03:26:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:17,562 INFO L480 AbstractCegarLoop]: Abstraction has 13056 states and 28787 transitions. [2021-04-15 03:26:17,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-04-15 03:26:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 13056 states and 28787 transitions. [2021-04-15 03:26:17,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 03:26:17,575 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:17,575 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:17,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:17,792 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:17,793 INFO L82 PathProgramCache]: Analyzing trace with hash -613294009, now seen corresponding path program 24 times [2021-04-15 03:26:17,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:17,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705349039] [2021-04-15 03:26:17,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:17,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705349039] [2021-04-15 03:26:17,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080755907] [2021-04-15 03:26:17,823 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 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 [2021-04-15 03:26:17,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 03:26:17,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:17,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:26:17,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:17,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:17,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:26:17,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186166066] [2021-04-15 03:26:17,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:26:17,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:17,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:26:17,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:26:17,913 INFO L87 Difference]: Start difference. First operand 13056 states and 28787 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-04-15 03:26:18,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:18,023 INFO L93 Difference]: Finished difference Result 17393 states and 37929 transitions. [2021-04-15 03:26:18,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:26:18,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-04-15 03:26:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:18,048 INFO L225 Difference]: With dead ends: 17393 [2021-04-15 03:26:18,048 INFO L226 Difference]: Without dead ends: 17393 [2021-04-15 03:26:18,049 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:26:18,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17393 states. [2021-04-15 03:26:18,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17393 to 15686. [2021-04-15 03:26:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15686 states, 15685 states have (on average 2.224099458080969) internal successors, (34885), 15685 states have internal predecessors, (34885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15686 states to 15686 states and 34885 transitions. [2021-04-15 03:26:18,263 INFO L78 Accepts]: Start accepts. Automaton has 15686 states and 34885 transitions. Word has length 46 [2021-04-15 03:26:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:18,263 INFO L480 AbstractCegarLoop]: Abstraction has 15686 states and 34885 transitions. [2021-04-15 03:26:18,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-04-15 03:26:18,264 INFO L276 IsEmpty]: Start isEmpty. Operand 15686 states and 34885 transitions. [2021-04-15 03:26:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 03:26:18,278 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:18,278 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:18,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 03:26:18,494 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:18,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:18,495 INFO L82 PathProgramCache]: Analyzing trace with hash 556761991, now seen corresponding path program 25 times [2021-04-15 03:26:18,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:18,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800421957] [2021-04-15 03:26:18,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:18,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800421957] [2021-04-15 03:26:18,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753304988] [2021-04-15 03:26:18,522 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 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 [2021-04-15 03:26:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:18,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:26:18,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:18,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:18,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:26:18,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427052695] [2021-04-15 03:26:18,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:26:18,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:18,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:26:18,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:26:18,605 INFO L87 Difference]: Start difference. First operand 15686 states and 34885 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-04-15 03:26:18,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:18,721 INFO L93 Difference]: Finished difference Result 16911 states and 36914 transitions. [2021-04-15 03:26:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:26:18,722 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-04-15 03:26:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:18,744 INFO L225 Difference]: With dead ends: 16911 [2021-04-15 03:26:18,744 INFO L226 Difference]: Without dead ends: 16863 [2021-04-15 03:26:18,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:26:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16863 states. [2021-04-15 03:26:18,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16863 to 14310. [2021-04-15 03:26:18,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14310 states, 14309 states have (on average 2.212104270039835) internal successors, (31653), 14309 states have internal predecessors, (31653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:19,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14310 states to 14310 states and 31653 transitions. [2021-04-15 03:26:19,012 INFO L78 Accepts]: Start accepts. Automaton has 14310 states and 31653 transitions. Word has length 46 [2021-04-15 03:26:19,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:19,013 INFO L480 AbstractCegarLoop]: Abstraction has 14310 states and 31653 transitions. [2021-04-15 03:26:19,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-04-15 03:26:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand 14310 states and 31653 transitions. [2021-04-15 03:26:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 03:26:19,027 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:19,027 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:19,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-04-15 03:26:19,241 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:19,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:19,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1979977875, now seen corresponding path program 26 times [2021-04-15 03:26:19,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:19,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045873935] [2021-04-15 03:26:19,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:19,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045873935] [2021-04-15 03:26:19,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882088811] [2021-04-15 03:26:19,272 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:26:19,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:26:19,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:19,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:26:19,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:19,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:19,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:19,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799786135] [2021-04-15 03:26:19,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:19,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:19,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:19,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:19,353 INFO L87 Difference]: Start difference. First operand 14310 states and 31653 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-04-15 03:26:19,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:19,476 INFO L93 Difference]: Finished difference Result 15209 states and 33173 transitions. [2021-04-15 03:26:19,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:26:19,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 46 [2021-04-15 03:26:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:19,501 INFO L225 Difference]: With dead ends: 15209 [2021-04-15 03:26:19,501 INFO L226 Difference]: Without dead ends: 15137 [2021-04-15 03:26:19,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15137 states. [2021-04-15 03:26:19,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15137 to 14314. [2021-04-15 03:26:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14314 states, 14313 states have (on average 2.2051980716830855) internal successors, (31563), 14313 states have internal predecessors, (31563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14314 states to 14314 states and 31563 transitions. [2021-04-15 03:26:19,745 INFO L78 Accepts]: Start accepts. Automaton has 14314 states and 31563 transitions. Word has length 46 [2021-04-15 03:26:19,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:19,745 INFO L480 AbstractCegarLoop]: Abstraction has 14314 states and 31563 transitions. [2021-04-15 03:26:19,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-04-15 03:26:19,745 INFO L276 IsEmpty]: Start isEmpty. Operand 14314 states and 31563 transitions. [2021-04-15 03:26:19,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 03:26:19,761 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:19,761 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:19,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-15 03:26:19,979 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:19,980 INFO L82 PathProgramCache]: Analyzing trace with hash 443374363, now seen corresponding path program 27 times [2021-04-15 03:26:19,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:19,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151929417] [2021-04-15 03:26:19,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 03:26:20,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151929417] [2021-04-15 03:26:20,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917597277] [2021-04-15 03:26:20,010 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:20,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 03:26:20,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:20,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:26:20,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 03:26:20,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:20,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:26:20,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322507880] [2021-04-15 03:26:20,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:26:20,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:20,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:26:20,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:26:20,101 INFO L87 Difference]: Start difference. First operand 14314 states and 31563 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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) [2021-04-15 03:26:20,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:20,249 INFO L93 Difference]: Finished difference Result 18333 states and 40131 transitions. [2021-04-15 03:26:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:26:20,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 46 [2021-04-15 03:26:20,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:20,276 INFO L225 Difference]: With dead ends: 18333 [2021-04-15 03:26:20,276 INFO L226 Difference]: Without dead ends: 18330 [2021-04-15 03:26:20,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:26:20,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18330 states. [2021-04-15 03:26:20,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18330 to 15498. [2021-04-15 03:26:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15498 states, 15497 states have (on average 2.2112021681615794) internal successors, (34267), 15497 states have internal predecessors, (34267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15498 states to 15498 states and 34267 transitions. [2021-04-15 03:26:20,578 INFO L78 Accepts]: Start accepts. Automaton has 15498 states and 34267 transitions. Word has length 46 [2021-04-15 03:26:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:20,578 INFO L480 AbstractCegarLoop]: Abstraction has 15498 states and 34267 transitions. [2021-04-15 03:26:20,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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) [2021-04-15 03:26:20,578 INFO L276 IsEmpty]: Start isEmpty. Operand 15498 states and 34267 transitions. [2021-04-15 03:26:20,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 03:26:20,592 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:20,592 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:20,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-15 03:26:20,809 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:20,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:20,809 INFO L82 PathProgramCache]: Analyzing trace with hash 729697573, now seen corresponding path program 28 times [2021-04-15 03:26:20,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:20,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626674376] [2021-04-15 03:26:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:20,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626674376] [2021-04-15 03:26:20,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757867100] [2021-04-15 03:26:20,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:20,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:26:20,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:20,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:26:20,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:20,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:20,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:26:20,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768680612] [2021-04-15 03:26:20,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:26:20,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:20,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:26:20,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:26:20,938 INFO L87 Difference]: Start difference. First operand 15498 states and 34267 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-04-15 03:26:21,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:21,061 INFO L93 Difference]: Finished difference Result 20808 states and 45501 transitions. [2021-04-15 03:26:21,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:26:21,061 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-04-15 03:26:21,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:21,094 INFO L225 Difference]: With dead ends: 20808 [2021-04-15 03:26:21,094 INFO L226 Difference]: Without dead ends: 20808 [2021-04-15 03:26:21,095 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:26:21,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20808 states. [2021-04-15 03:26:21,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20808 to 19050. [2021-04-15 03:26:21,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19050 states, 19049 states have (on average 2.2252611685652792) internal successors, (42389), 19049 states have internal predecessors, (42389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:21,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19050 states to 19050 states and 42389 transitions. [2021-04-15 03:26:21,416 INFO L78 Accepts]: Start accepts. Automaton has 19050 states and 42389 transitions. Word has length 46 [2021-04-15 03:26:21,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:21,416 INFO L480 AbstractCegarLoop]: Abstraction has 19050 states and 42389 transitions. [2021-04-15 03:26:21,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-04-15 03:26:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 19050 states and 42389 transitions. [2021-04-15 03:26:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 03:26:21,434 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:21,434 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:21,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:21,635 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:21,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:21,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1899753573, now seen corresponding path program 29 times [2021-04-15 03:26:21,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:21,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987637467] [2021-04-15 03:26:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:21,664 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:21,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987637467] [2021-04-15 03:26:21,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818726830] [2021-04-15 03:26:21,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:21,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:26:21,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:21,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:26:21,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:21,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:21,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:26:21,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983631376] [2021-04-15 03:26:21,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:26:21,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:21,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:26:21,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:26:21,754 INFO L87 Difference]: Start difference. First operand 19050 states and 42389 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-04-15 03:26:21,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:21,881 INFO L93 Difference]: Finished difference Result 20381 states and 44592 transitions. [2021-04-15 03:26:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:26:21,881 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-04-15 03:26:21,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:21,911 INFO L225 Difference]: With dead ends: 20381 [2021-04-15 03:26:21,912 INFO L226 Difference]: Without dead ends: 20349 [2021-04-15 03:26:21,912 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:26:21,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20349 states. [2021-04-15 03:26:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20349 to 19030. [2021-04-15 03:26:22,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19030 states, 19029 states have (on average 2.2227652530348414) internal successors, (42297), 19029 states have internal predecessors, (42297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42297 transitions. [2021-04-15 03:26:22,272 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42297 transitions. Word has length 46 [2021-04-15 03:26:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:22,272 INFO L480 AbstractCegarLoop]: Abstraction has 19030 states and 42297 transitions. [2021-04-15 03:26:22,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-04-15 03:26:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42297 transitions. [2021-04-15 03:26:22,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 03:26:22,290 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:22,291 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:22,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-04-15 03:26:22,491 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:22,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:22,492 INFO L82 PathProgramCache]: Analyzing trace with hash -636986293, now seen corresponding path program 30 times [2021-04-15 03:26:22,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:22,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516946109] [2021-04-15 03:26:22,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:22,532 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:22,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516946109] [2021-04-15 03:26:22,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594891726] [2021-04-15 03:26:22,532 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 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 [2021-04-15 03:26:22,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 03:26:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:22,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:26:22,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:22,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:22,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:22,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236731258] [2021-04-15 03:26:22,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:22,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:22,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:22,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:22,621 INFO L87 Difference]: Start difference. First operand 19030 states and 42297 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-04-15 03:26:22,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:22,764 INFO L93 Difference]: Finished difference Result 20409 states and 44584 transitions. [2021-04-15 03:26:22,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:26:22,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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 46 [2021-04-15 03:26:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:22,801 INFO L225 Difference]: With dead ends: 20409 [2021-04-15 03:26:22,801 INFO L226 Difference]: Without dead ends: 20337 [2021-04-15 03:26:22,801 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:22,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20337 states. [2021-04-15 03:26:23,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20337 to 19030. [2021-04-15 03:26:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19030 states, 19029 states have (on average 2.216459088759262) internal successors, (42177), 19029 states have internal predecessors, (42177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19030 states to 19030 states and 42177 transitions. [2021-04-15 03:26:23,113 INFO L78 Accepts]: Start accepts. Automaton has 19030 states and 42177 transitions. Word has length 46 [2021-04-15 03:26:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:23,113 INFO L480 AbstractCegarLoop]: Abstraction has 19030 states and 42177 transitions. [2021-04-15 03:26:23,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 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) [2021-04-15 03:26:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 19030 states and 42177 transitions. [2021-04-15 03:26:23,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 03:26:23,130 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:23,130 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:23,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-04-15 03:26:23,332 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:23,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:23,332 INFO L82 PathProgramCache]: Analyzing trace with hash 725045157, now seen corresponding path program 31 times [2021-04-15 03:26:23,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:23,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853870776] [2021-04-15 03:26:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:23,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853870776] [2021-04-15 03:26:23,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043709462] [2021-04-15 03:26:23,368 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:26:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:23,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:26:23,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:23,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:23,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:26:23,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712503883] [2021-04-15 03:26:23,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:26:23,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:23,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:26:23,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:26:23,456 INFO L87 Difference]: Start difference. First operand 19030 states and 42177 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2021-04-15 03:26:23,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:23,608 INFO L93 Difference]: Finished difference Result 20155 states and 44063 transitions. [2021-04-15 03:26:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:26:23,609 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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 46 [2021-04-15 03:26:23,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:23,641 INFO L225 Difference]: With dead ends: 20155 [2021-04-15 03:26:23,641 INFO L226 Difference]: Without dead ends: 20027 [2021-04-15 03:26:23,642 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:26:23,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20027 states. [2021-04-15 03:26:23,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20027 to 19078. [2021-04-15 03:26:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19078 states, 19077 states have (on average 2.210043507889081) internal successors, (42161), 19077 states have internal predecessors, (42161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:23,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19078 states to 19078 states and 42161 transitions. [2021-04-15 03:26:23,953 INFO L78 Accepts]: Start accepts. Automaton has 19078 states and 42161 transitions. Word has length 46 [2021-04-15 03:26:23,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:23,954 INFO L480 AbstractCegarLoop]: Abstraction has 19078 states and 42161 transitions. [2021-04-15 03:26:23,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 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) [2021-04-15 03:26:23,954 INFO L276 IsEmpty]: Start isEmpty. Operand 19078 states and 42161 transitions. [2021-04-15 03:26:24,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 03:26:24,092 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:24,092 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:24,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:24,297 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:24,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:24,297 INFO L82 PathProgramCache]: Analyzing trace with hash -876630137, now seen corresponding path program 32 times [2021-04-15 03:26:24,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:24,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198499290] [2021-04-15 03:26:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:24,330 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 03:26:24,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198499290] [2021-04-15 03:26:24,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570352741] [2021-04-15 03:26:24,330 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 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 [2021-04-15 03:26:24,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:26:24,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:24,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:26:24,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 03:26:24,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:24,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:26:24,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809960182] [2021-04-15 03:26:24,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:26:24,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:24,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:26:24,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:26:24,415 INFO L87 Difference]: Start difference. First operand 19078 states and 42161 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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) [2021-04-15 03:26:24,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:24,544 INFO L93 Difference]: Finished difference Result 20680 states and 45191 transitions. [2021-04-15 03:26:24,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:26:24,544 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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 46 [2021-04-15 03:26:24,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:24,568 INFO L225 Difference]: With dead ends: 20680 [2021-04-15 03:26:24,568 INFO L226 Difference]: Without dead ends: 20680 [2021-04-15 03:26:24,569 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:26:24,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20680 states. [2021-04-15 03:26:24,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20680 to 17730. [2021-04-15 03:26:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17730 states, 17729 states have (on average 2.2009701618816626) internal successors, (39021), 17729 states have internal predecessors, (39021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17730 states to 17730 states and 39021 transitions. [2021-04-15 03:26:24,827 INFO L78 Accepts]: Start accepts. Automaton has 17730 states and 39021 transitions. Word has length 46 [2021-04-15 03:26:24,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:24,827 INFO L480 AbstractCegarLoop]: Abstraction has 17730 states and 39021 transitions. [2021-04-15 03:26:24,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 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) [2021-04-15 03:26:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 17730 states and 39021 transitions. [2021-04-15 03:26:24,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 03:26:24,844 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:24,844 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:25,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-04-15 03:26:25,045 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:25,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:25,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1293149669, now seen corresponding path program 33 times [2021-04-15 03:26:25,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:25,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284561641] [2021-04-15 03:26:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 03:26:25,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284561641] [2021-04-15 03:26:25,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544901598] [2021-04-15 03:26:25,071 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 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 [2021-04-15 03:26:25,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:26:25,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:25,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:26:25,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 03:26:25,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:25,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:25,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339952511] [2021-04-15 03:26:25,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:25,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:25,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:25,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:25,151 INFO L87 Difference]: Start difference. First operand 17730 states and 39021 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:25,268 INFO L93 Difference]: Finished difference Result 19104 states and 41588 transitions. [2021-04-15 03:26:25,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:26:25,268 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 03:26:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:25,290 INFO L225 Difference]: With dead ends: 19104 [2021-04-15 03:26:25,290 INFO L226 Difference]: Without dead ends: 19104 [2021-04-15 03:26:25,291 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19104 states. [2021-04-15 03:26:25,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19104 to 17742. [2021-04-15 03:26:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17742 states, 17741 states have (on average 2.200834225804633) internal successors, (39045), 17741 states have internal predecessors, (39045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17742 states to 17742 states and 39045 transitions. [2021-04-15 03:26:25,522 INFO L78 Accepts]: Start accepts. Automaton has 17742 states and 39045 transitions. Word has length 46 [2021-04-15 03:26:25,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:25,522 INFO L480 AbstractCegarLoop]: Abstraction has 17742 states and 39045 transitions. [2021-04-15 03:26:25,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:25,522 INFO L276 IsEmpty]: Start isEmpty. Operand 17742 states and 39045 transitions. [2021-04-15 03:26:25,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 03:26:25,540 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:25,540 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:25,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:25,740 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:25,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:25,741 INFO L82 PathProgramCache]: Analyzing trace with hash -731848889, now seen corresponding path program 34 times [2021-04-15 03:26:25,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:25,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780903936] [2021-04-15 03:26:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:25,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780903936] [2021-04-15 03:26:25,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573416881] [2021-04-15 03:26:25,770 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 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 [2021-04-15 03:26:25,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:26:25,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:25,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:26:25,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:25,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:25,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:26:25,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008804564] [2021-04-15 03:26:25,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:26:25,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:25,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:26:25,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:26:25,854 INFO L87 Difference]: Start difference. First operand 17742 states and 39045 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-04-15 03:26:26,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:26,056 INFO L93 Difference]: Finished difference Result 21829 states and 47682 transitions. [2021-04-15 03:26:26,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:26:26,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-04-15 03:26:26,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:26,083 INFO L225 Difference]: With dead ends: 21829 [2021-04-15 03:26:26,083 INFO L226 Difference]: Without dead ends: 21829 [2021-04-15 03:26:26,083 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:26:26,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21829 states. [2021-04-15 03:26:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21829 to 20406. [2021-04-15 03:26:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20406 states, 20405 states have (on average 2.2182308257779955) internal successors, (45263), 20405 states have internal predecessors, (45263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:26,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20406 states to 20406 states and 45263 transitions. [2021-04-15 03:26:26,353 INFO L78 Accepts]: Start accepts. Automaton has 20406 states and 45263 transitions. Word has length 46 [2021-04-15 03:26:26,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:26,353 INFO L480 AbstractCegarLoop]: Abstraction has 20406 states and 45263 transitions. [2021-04-15 03:26:26,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-04-15 03:26:26,353 INFO L276 IsEmpty]: Start isEmpty. Operand 20406 states and 45263 transitions. [2021-04-15 03:26:26,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 03:26:26,372 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:26,372 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:26,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-04-15 03:26:26,573 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:26,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:26,573 INFO L82 PathProgramCache]: Analyzing trace with hash 438207111, now seen corresponding path program 35 times [2021-04-15 03:26:26,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:26,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916504588] [2021-04-15 03:26:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:26,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916504588] [2021-04-15 03:26:26,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246102544] [2021-04-15 03:26:26,599 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 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 [2021-04-15 03:26:26,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 03:26:26,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:26,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:26:26,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:26,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:26,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:26:26,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718330241] [2021-04-15 03:26:26,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:26:26,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:26,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:26:26,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:26:26,682 INFO L87 Difference]: Start difference. First operand 20406 states and 45263 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-04-15 03:26:26,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:26,819 INFO L93 Difference]: Finished difference Result 21712 states and 47427 transitions. [2021-04-15 03:26:26,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:26:26,819 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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 46 [2021-04-15 03:26:26,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:26,856 INFO L225 Difference]: With dead ends: 21712 [2021-04-15 03:26:26,856 INFO L226 Difference]: Without dead ends: 21704 [2021-04-15 03:26:26,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:26:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21704 states. [2021-04-15 03:26:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21704 to 20402. [2021-04-15 03:26:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20402 states, 20401 states have (on average 2.21768540757806) internal successors, (45243), 20401 states have internal predecessors, (45243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:27,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45243 transitions. [2021-04-15 03:26:27,159 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45243 transitions. Word has length 46 [2021-04-15 03:26:27,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:27,159 INFO L480 AbstractCegarLoop]: Abstraction has 20402 states and 45243 transitions. [2021-04-15 03:26:27,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 6 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) [2021-04-15 03:26:27,160 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45243 transitions. [2021-04-15 03:26:27,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-04-15 03:26:27,177 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:27,178 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:27,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:27,378 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:27,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:27,379 INFO L82 PathProgramCache]: Analyzing trace with hash -2098532755, now seen corresponding path program 36 times [2021-04-15 03:26:27,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:27,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481452586] [2021-04-15 03:26:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:27,409 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:27,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481452586] [2021-04-15 03:26:27,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560070341] [2021-04-15 03:26:27,410 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 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 [2021-04-15 03:26:27,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 03:26:27,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:27,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-04-15 03:26:27,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 03:26:27,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:27,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-04-15 03:26:27,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459142857] [2021-04-15 03:26:27,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:26:27,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:27,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:26:27,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:27,525 INFO L87 Difference]: Start difference. First operand 20402 states and 45243 transitions. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:28,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:28,039 INFO L93 Difference]: Finished difference Result 28400 states and 61628 transitions. [2021-04-15 03:26:28,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-04-15 03:26:28,040 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-04-15 03:26:28,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:28,080 INFO L225 Difference]: With dead ends: 28400 [2021-04-15 03:26:28,080 INFO L226 Difference]: Without dead ends: 28376 [2021-04-15 03:26:28,081 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:26:28,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28376 states. [2021-04-15 03:26:28,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28376 to 20402. [2021-04-15 03:26:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20402 states, 20401 states have (on average 2.212979755894319) internal successors, (45147), 20401 states have internal predecessors, (45147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20402 states to 20402 states and 45147 transitions. [2021-04-15 03:26:28,479 INFO L78 Accepts]: Start accepts. Automaton has 20402 states and 45147 transitions. Word has length 46 [2021-04-15 03:26:28,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:28,479 INFO L480 AbstractCegarLoop]: Abstraction has 20402 states and 45147 transitions. [2021-04-15 03:26:28,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:28,479 INFO L276 IsEmpty]: Start isEmpty. Operand 20402 states and 45147 transitions. [2021-04-15 03:26:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:28,503 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:28,503 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:28,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-04-15 03:26:28,704 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:28,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:28,704 INFO L82 PathProgramCache]: Analyzing trace with hash -676350810, now seen corresponding path program 37 times [2021-04-15 03:26:28,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:28,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227428581] [2021-04-15 03:26:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:28,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227428581] [2021-04-15 03:26:28,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621109326] [2021-04-15 03:26:28,766 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 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 [2021-04-15 03:26:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:28,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:28,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 30 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:28,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:28,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:26:28,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913261740] [2021-04-15 03:26:28,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:26:28,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:28,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:26:28,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:26:28,882 INFO L87 Difference]: Start difference. First operand 20402 states and 45147 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:29,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:29,113 INFO L93 Difference]: Finished difference Result 25889 states and 56595 transitions. [2021-04-15 03:26:29,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:26:29,114 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:29,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:29,151 INFO L225 Difference]: With dead ends: 25889 [2021-04-15 03:26:29,152 INFO L226 Difference]: Without dead ends: 25889 [2021-04-15 03:26:29,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:26:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25889 states. [2021-04-15 03:26:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25889 to 21836. [2021-04-15 03:26:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21836 states, 21835 states have (on average 2.216762079230593) internal successors, (48403), 21835 states have internal predecessors, (48403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21836 states to 21836 states and 48403 transitions. [2021-04-15 03:26:29,512 INFO L78 Accepts]: Start accepts. Automaton has 21836 states and 48403 transitions. Word has length 56 [2021-04-15 03:26:29,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:29,512 INFO L480 AbstractCegarLoop]: Abstraction has 21836 states and 48403 transitions. [2021-04-15 03:26:29,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:29,513 INFO L276 IsEmpty]: Start isEmpty. Operand 21836 states and 48403 transitions. [2021-04-15 03:26:29,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:29,538 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:29,538 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:29,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 03:26:29,738 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:29,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:29,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1178558949, now seen corresponding path program 38 times [2021-04-15 03:26:29,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:29,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726201588] [2021-04-15 03:26:29,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:29,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726201588] [2021-04-15 03:26:29,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247975289] [2021-04-15 03:26:29,795 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 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 [2021-04-15 03:26:29,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:26:29,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:29,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:29,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:29,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:29,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:26:29,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779602922] [2021-04-15 03:26:29,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:26:29,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:29,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:26:29,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:26:29,891 INFO L87 Difference]: Start difference. First operand 21836 states and 48403 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:30,122 INFO L93 Difference]: Finished difference Result 31481 states and 69778 transitions. [2021-04-15 03:26:30,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:26:30,122 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:30,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:30,172 INFO L225 Difference]: With dead ends: 31481 [2021-04-15 03:26:30,172 INFO L226 Difference]: Without dead ends: 31323 [2021-04-15 03:26:30,173 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:26:30,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31323 states. [2021-04-15 03:26:30,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31323 to 30212. [2021-04-15 03:26:30,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30212 states, 30211 states have (on average 2.2320015888252622) internal successors, (67431), 30211 states have internal predecessors, (67431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:30,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30212 states to 30212 states and 67431 transitions. [2021-04-15 03:26:30,691 INFO L78 Accepts]: Start accepts. Automaton has 30212 states and 67431 transitions. Word has length 56 [2021-04-15 03:26:30,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:30,691 INFO L480 AbstractCegarLoop]: Abstraction has 30212 states and 67431 transitions. [2021-04-15 03:26:30,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:30,692 INFO L276 IsEmpty]: Start isEmpty. Operand 30212 states and 67431 transitions. [2021-04-15 03:26:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:30,849 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:30,849 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:31,050 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:31,050 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:31,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:31,051 INFO L82 PathProgramCache]: Analyzing trace with hash 153461775, now seen corresponding path program 39 times [2021-04-15 03:26:31,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:31,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599432623] [2021-04-15 03:26:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:31,082 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:31,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599432623] [2021-04-15 03:26:31,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295689783] [2021-04-15 03:26:31,082 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 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 [2021-04-15 03:26:31,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:26:31,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:31,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:31,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:31,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:31,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:31,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177850084] [2021-04-15 03:26:31,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:31,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:31,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:31,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:31,181 INFO L87 Difference]: Start difference. First operand 30212 states and 67431 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:31,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:31,342 INFO L93 Difference]: Finished difference Result 31139 states and 68850 transitions. [2021-04-15 03:26:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:26:31,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:31,387 INFO L225 Difference]: With dead ends: 31139 [2021-04-15 03:26:31,388 INFO L226 Difference]: Without dead ends: 31139 [2021-04-15 03:26:31,388 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:31,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31139 states. [2021-04-15 03:26:31,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31139 to 28244. [2021-04-15 03:26:31,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28244 states, 28243 states have (on average 2.2232411571008743) internal successors, (62791), 28243 states have internal predecessors, (62791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:31,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28244 states to 28244 states and 62791 transitions. [2021-04-15 03:26:31,828 INFO L78 Accepts]: Start accepts. Automaton has 28244 states and 62791 transitions. Word has length 56 [2021-04-15 03:26:31,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:31,829 INFO L480 AbstractCegarLoop]: Abstraction has 28244 states and 62791 transitions. [2021-04-15 03:26:31,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:31,829 INFO L276 IsEmpty]: Start isEmpty. Operand 28244 states and 62791 transitions. [2021-04-15 03:26:31,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:31,858 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:31,858 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:32,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-04-15 03:26:32,059 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:32,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:32,059 INFO L82 PathProgramCache]: Analyzing trace with hash 359936614, now seen corresponding path program 40 times [2021-04-15 03:26:32,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:32,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394817192] [2021-04-15 03:26:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:32,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394817192] [2021-04-15 03:26:32,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718961473] [2021-04-15 03:26:32,091 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 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 [2021-04-15 03:26:32,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:26:32,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:32,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:32,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 45 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:32,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:32,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:32,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656345677] [2021-04-15 03:26:32,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:32,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:32,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:32,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:32,188 INFO L87 Difference]: Start difference. First operand 28244 states and 62791 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:32,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:32,348 INFO L93 Difference]: Finished difference Result 29356 states and 64669 transitions. [2021-04-15 03:26:32,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:26:32,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:32,386 INFO L225 Difference]: With dead ends: 29356 [2021-04-15 03:26:32,386 INFO L226 Difference]: Without dead ends: 29352 [2021-04-15 03:26:32,386 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29352 states. [2021-04-15 03:26:32,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29352 to 27360. [2021-04-15 03:26:32,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27360 states, 27359 states have (on average 2.2246061625059395) internal successors, (60863), 27359 states have internal predecessors, (60863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:32,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27360 states to 27360 states and 60863 transitions. [2021-04-15 03:26:32,815 INFO L78 Accepts]: Start accepts. Automaton has 27360 states and 60863 transitions. Word has length 56 [2021-04-15 03:26:32,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:32,815 INFO L480 AbstractCegarLoop]: Abstraction has 27360 states and 60863 transitions. [2021-04-15 03:26:32,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:32,815 INFO L276 IsEmpty]: Start isEmpty. Operand 27360 states and 60863 transitions. [2021-04-15 03:26:32,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:32,847 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:32,847 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:33,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:33,048 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:33,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:33,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1412824282, now seen corresponding path program 41 times [2021-04-15 03:26:33,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:33,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086029246] [2021-04-15 03:26:33,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:33,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086029246] [2021-04-15 03:26:33,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048723640] [2021-04-15 03:26:33,080 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 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 [2021-04-15 03:26:33,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-04-15 03:26:33,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:33,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:33,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:33,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:33,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:33,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898506793] [2021-04-15 03:26:33,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:33,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:33,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:33,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:33,181 INFO L87 Difference]: Start difference. First operand 27360 states and 60863 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:33,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:33,363 INFO L93 Difference]: Finished difference Result 35236 states and 77241 transitions. [2021-04-15 03:26:33,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:26:33,363 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:33,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:33,427 INFO L225 Difference]: With dead ends: 35236 [2021-04-15 03:26:33,427 INFO L226 Difference]: Without dead ends: 35236 [2021-04-15 03:26:33,427 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:33,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35236 states. [2021-04-15 03:26:33,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35236 to 31608. [2021-04-15 03:26:33,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31608 states, 31607 states have (on average 2.2330180023412534) internal successors, (70579), 31607 states have internal predecessors, (70579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:34,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31608 states to 31608 states and 70579 transitions. [2021-04-15 03:26:34,046 INFO L78 Accepts]: Start accepts. Automaton has 31608 states and 70579 transitions. Word has length 56 [2021-04-15 03:26:34,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:34,046 INFO L480 AbstractCegarLoop]: Abstraction has 31608 states and 70579 transitions. [2021-04-15 03:26:34,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:34,046 INFO L276 IsEmpty]: Start isEmpty. Operand 31608 states and 70579 transitions. [2021-04-15 03:26:34,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:34,079 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:34,079 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:34,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:34,280 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:34,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:34,280 INFO L82 PathProgramCache]: Analyzing trace with hash -417869413, now seen corresponding path program 42 times [2021-04-15 03:26:34,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:34,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883534291] [2021-04-15 03:26:34,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:34,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883534291] [2021-04-15 03:26:34,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573000497] [2021-04-15 03:26:34,315 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 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 [2021-04-15 03:26:34,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 03:26:34,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:34,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:34,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 51 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:34,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:34,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:34,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796815619] [2021-04-15 03:26:34,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:34,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:34,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:34,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:34,418 INFO L87 Difference]: Start difference. First operand 31608 states and 70579 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:34,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:34,595 INFO L93 Difference]: Finished difference Result 34730 states and 77163 transitions. [2021-04-15 03:26:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:26:34,596 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:34,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:34,644 INFO L225 Difference]: With dead ends: 34730 [2021-04-15 03:26:34,644 INFO L226 Difference]: Without dead ends: 34724 [2021-04-15 03:26:34,644 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34724 states. [2021-04-15 03:26:35,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34724 to 33620. [2021-04-15 03:26:35,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33620 states, 33619 states have (on average 2.240013087837235) internal successors, (75307), 33619 states have internal predecessors, (75307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33620 states to 33620 states and 75307 transitions. [2021-04-15 03:26:35,173 INFO L78 Accepts]: Start accepts. Automaton has 33620 states and 75307 transitions. Word has length 56 [2021-04-15 03:26:35,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:35,173 INFO L480 AbstractCegarLoop]: Abstraction has 33620 states and 75307 transitions. [2021-04-15 03:26:35,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:35,174 INFO L276 IsEmpty]: Start isEmpty. Operand 33620 states and 75307 transitions. [2021-04-15 03:26:35,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:35,207 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:35,208 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:35,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-04-15 03:26:35,413 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:35,413 INFO L82 PathProgramCache]: Analyzing trace with hash -113143793, now seen corresponding path program 43 times [2021-04-15 03:26:35,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:35,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860350053] [2021-04-15 03:26:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:35,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860350053] [2021-04-15 03:26:35,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437903105] [2021-04-15 03:26:35,444 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 [2021-04-15 03:26:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:35,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:35,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:35,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:35,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:35,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708510123] [2021-04-15 03:26:35,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:35,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:35,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:35,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:35,536 INFO L87 Difference]: Start difference. First operand 33620 states and 75307 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:35,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:35,709 INFO L93 Difference]: Finished difference Result 35642 states and 78991 transitions. [2021-04-15 03:26:35,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:26:35,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:35,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:35,768 INFO L225 Difference]: With dead ends: 35642 [2021-04-15 03:26:35,768 INFO L226 Difference]: Without dead ends: 35640 [2021-04-15 03:26:35,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35640 states. [2021-04-15 03:26:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35640 to 33704. [2021-04-15 03:26:36,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33704 states, 33703 states have (on average 2.237159896745097) internal successors, (75399), 33703 states have internal predecessors, (75399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:36,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33704 states to 33704 states and 75399 transitions. [2021-04-15 03:26:36,374 INFO L78 Accepts]: Start accepts. Automaton has 33704 states and 75399 transitions. Word has length 56 [2021-04-15 03:26:36,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:36,374 INFO L480 AbstractCegarLoop]: Abstraction has 33704 states and 75399 transitions. [2021-04-15 03:26:36,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:36,374 INFO L276 IsEmpty]: Start isEmpty. Operand 33704 states and 75399 transitions. [2021-04-15 03:26:36,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:36,409 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:36,409 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:36,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:36,614 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:36,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:36,614 INFO L82 PathProgramCache]: Analyzing trace with hash 93331046, now seen corresponding path program 44 times [2021-04-15 03:26:36,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:36,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317341241] [2021-04-15 03:26:36,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:36,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317341241] [2021-04-15 03:26:36,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286046914] [2021-04-15 03:26:36,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:36,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:26:36,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:36,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:36,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:36,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:36,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:36,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681855856] [2021-04-15 03:26:36,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:36,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:36,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:36,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:36,757 INFO L87 Difference]: Start difference. First operand 33704 states and 75399 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:36,986 INFO L93 Difference]: Finished difference Result 35791 states and 78899 transitions. [2021-04-15 03:26:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:26:36,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:36,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:37,045 INFO L225 Difference]: With dead ends: 35791 [2021-04-15 03:26:37,045 INFO L226 Difference]: Without dead ends: 35723 [2021-04-15 03:26:37,045 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:37,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35723 states. [2021-04-15 03:26:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35723 to 33624. [2021-04-15 03:26:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33624 states, 33623 states have (on average 2.2343931237545727) internal successors, (75127), 33623 states have internal predecessors, (75127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:37,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33624 states to 33624 states and 75127 transitions. [2021-04-15 03:26:37,604 INFO L78 Accepts]: Start accepts. Automaton has 33624 states and 75127 transitions. Word has length 56 [2021-04-15 03:26:37,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:37,604 INFO L480 AbstractCegarLoop]: Abstraction has 33624 states and 75127 transitions. [2021-04-15 03:26:37,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:37,604 INFO L276 IsEmpty]: Start isEmpty. Operand 33624 states and 75127 transitions. [2021-04-15 03:26:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:37,638 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:37,638 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:37,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-04-15 03:26:37,839 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:37,839 INFO L82 PathProgramCache]: Analyzing trace with hash 277060133, now seen corresponding path program 45 times [2021-04-15 03:26:37,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:37,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863033046] [2021-04-15 03:26:37,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:37,874 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:37,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863033046] [2021-04-15 03:26:37,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613133499] [2021-04-15 03:26:37,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:26:37,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:26:37,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:37,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:37,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:37,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:37,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:26:37,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632734198] [2021-04-15 03:26:37,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:26:37,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:37,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:26:37,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:26:37,976 INFO L87 Difference]: Start difference. First operand 33624 states and 75127 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:38,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:38,171 INFO L93 Difference]: Finished difference Result 35258 states and 78007 transitions. [2021-04-15 03:26:38,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:26:38,171 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:38,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:38,231 INFO L225 Difference]: With dead ends: 35258 [2021-04-15 03:26:38,232 INFO L226 Difference]: Without dead ends: 35256 [2021-04-15 03:26:38,232 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:26:38,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35256 states. [2021-04-15 03:26:38,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35256 to 33208. [2021-04-15 03:26:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 33207 states have (on average 2.2308248260908843) internal successors, (74079), 33207 states have internal predecessors, (74079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:38,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74079 transitions. [2021-04-15 03:26:38,961 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74079 transitions. Word has length 56 [2021-04-15 03:26:38,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:38,961 INFO L480 AbstractCegarLoop]: Abstraction has 33208 states and 74079 transitions. [2021-04-15 03:26:38,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:38,961 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74079 transitions. [2021-04-15 03:26:38,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:38,992 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:38,992 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:39,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-04-15 03:26:39,195 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:39,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:39,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1851558476, now seen corresponding path program 46 times [2021-04-15 03:26:39,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:39,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890395848] [2021-04-15 03:26:39,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:39,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890395848] [2021-04-15 03:26:39,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556059881] [2021-04-15 03:26:39,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:26:39,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:26:39,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:39,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:39,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:39,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:39,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:26:39,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945782535] [2021-04-15 03:26:39,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:26:39,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:39,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:26:39,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:26:39,496 INFO L87 Difference]: Start difference. First operand 33208 states and 74079 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:39,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:39,720 INFO L93 Difference]: Finished difference Result 34889 states and 76950 transitions. [2021-04-15 03:26:39,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:26:39,721 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:39,776 INFO L225 Difference]: With dead ends: 34889 [2021-04-15 03:26:39,776 INFO L226 Difference]: Without dead ends: 34865 [2021-04-15 03:26:39,776 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:26:39,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34865 states. [2021-04-15 03:26:40,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34865 to 33208. [2021-04-15 03:26:40,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33208 states, 33207 states have (on average 2.2297407173186374) internal successors, (74043), 33207 states have internal predecessors, (74043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:40,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33208 states to 33208 states and 74043 transitions. [2021-04-15 03:26:40,368 INFO L78 Accepts]: Start accepts. Automaton has 33208 states and 74043 transitions. Word has length 56 [2021-04-15 03:26:40,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:40,368 INFO L480 AbstractCegarLoop]: Abstraction has 33208 states and 74043 transitions. [2021-04-15 03:26:40,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:40,368 INFO L276 IsEmpty]: Start isEmpty. Operand 33208 states and 74043 transitions. [2021-04-15 03:26:40,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:40,405 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:40,405 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:40,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-04-15 03:26:40,606 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:40,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:40,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1633200633, now seen corresponding path program 47 times [2021-04-15 03:26:40,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:40,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211751758] [2021-04-15 03:26:40,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:26:40,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211751758] [2021-04-15 03:26:40,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798797437] [2021-04-15 03:26:40,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:40,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 03:26:40,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:40,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:40,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:26:40,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:40,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:40,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328118688] [2021-04-15 03:26:40,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:40,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:40,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:40,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:40,728 INFO L87 Difference]: Start difference. First operand 33208 states and 74043 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:41,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:41,025 INFO L93 Difference]: Finished difference Result 35848 states and 79532 transitions. [2021-04-15 03:26:41,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:26:41,026 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:41,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:41,103 INFO L225 Difference]: With dead ends: 35848 [2021-04-15 03:26:41,103 INFO L226 Difference]: Without dead ends: 35812 [2021-04-15 03:26:41,104 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:41,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35812 states. [2021-04-15 03:26:41,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35812 to 32944. [2021-04-15 03:26:41,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32944 states, 32943 states have (on average 2.231581823149076) internal successors, (73515), 32943 states have internal predecessors, (73515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:41,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32944 states to 32944 states and 73515 transitions. [2021-04-15 03:26:41,680 INFO L78 Accepts]: Start accepts. Automaton has 32944 states and 73515 transitions. Word has length 56 [2021-04-15 03:26:41,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:41,680 INFO L480 AbstractCegarLoop]: Abstraction has 32944 states and 73515 transitions. [2021-04-15 03:26:41,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand 32944 states and 73515 transitions. [2021-04-15 03:26:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:41,709 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:41,709 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:41,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-04-15 03:26:41,909 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:41,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:41,910 INFO L82 PathProgramCache]: Analyzing trace with hash -916831962, now seen corresponding path program 48 times [2021-04-15 03:26:41,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:41,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509446161] [2021-04-15 03:26:41,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:41,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509446161] [2021-04-15 03:26:41,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009801365] [2021-04-15 03:26:41,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:41,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:26:41,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:41,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:41,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 13 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:42,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:42,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:42,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694206347] [2021-04-15 03:26:42,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:42,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:42,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:42,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:42,051 INFO L87 Difference]: Start difference. First operand 32944 states and 73515 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:42,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:42,414 INFO L93 Difference]: Finished difference Result 40718 states and 89870 transitions. [2021-04-15 03:26:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:26:42,415 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:42,512 INFO L225 Difference]: With dead ends: 40718 [2021-04-15 03:26:42,513 INFO L226 Difference]: Without dead ends: 40718 [2021-04-15 03:26:42,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40718 states. [2021-04-15 03:26:43,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40718 to 37152. [2021-04-15 03:26:43,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37152 states, 37151 states have (on average 2.2417431563080403) internal successors, (83283), 37151 states have internal predecessors, (83283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37152 states to 37152 states and 83283 transitions. [2021-04-15 03:26:43,313 INFO L78 Accepts]: Start accepts. Automaton has 37152 states and 83283 transitions. Word has length 56 [2021-04-15 03:26:43,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:43,313 INFO L480 AbstractCegarLoop]: Abstraction has 37152 states and 83283 transitions. [2021-04-15 03:26:43,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:43,313 INFO L276 IsEmpty]: Start isEmpty. Operand 37152 states and 83283 transitions. [2021-04-15 03:26:43,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:43,344 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:43,344 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:43,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:43,557 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:43,557 INFO L82 PathProgramCache]: Analyzing trace with hash 78122907, now seen corresponding path program 49 times [2021-04-15 03:26:43,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:43,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71427657] [2021-04-15 03:26:43,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:43,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71427657] [2021-04-15 03:26:43,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846181163] [2021-04-15 03:26:43,586 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:43,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:43,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 61 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:43,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:43,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:43,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017808910] [2021-04-15 03:26:43,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:43,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:43,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:43,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:43,675 INFO L87 Difference]: Start difference. First operand 37152 states and 83283 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:43,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:43,870 INFO L93 Difference]: Finished difference Result 40524 states and 90274 transitions. [2021-04-15 03:26:43,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:26:43,870 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:43,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:43,934 INFO L225 Difference]: With dead ends: 40524 [2021-04-15 03:26:43,934 INFO L226 Difference]: Without dead ends: 40488 [2021-04-15 03:26:43,934 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:43,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40488 states. [2021-04-15 03:26:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40488 to 36712. [2021-04-15 03:26:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36712 states, 36711 states have (on average 2.242025550924791) internal successors, (82307), 36711 states have internal predecessors, (82307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:44,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36712 states to 36712 states and 82307 transitions. [2021-04-15 03:26:44,711 INFO L78 Accepts]: Start accepts. Automaton has 36712 states and 82307 transitions. Word has length 56 [2021-04-15 03:26:44,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:44,711 INFO L480 AbstractCegarLoop]: Abstraction has 36712 states and 82307 transitions. [2021-04-15 03:26:44,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:44,712 INFO L276 IsEmpty]: Start isEmpty. Operand 36712 states and 82307 transitions. [2021-04-15 03:26:44,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:44,743 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:44,743 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:44,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:44,944 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:44,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:44,944 INFO L82 PathProgramCache]: Analyzing trace with hash 382848527, now seen corresponding path program 50 times [2021-04-15 03:26:44,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:44,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474075069] [2021-04-15 03:26:44,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:44,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474075069] [2021-04-15 03:26:44,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135207241] [2021-04-15 03:26:44,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:45,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:26:45,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:45,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:45,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 47 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:45,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:45,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:45,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686930962] [2021-04-15 03:26:45,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:45,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:45,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:45,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:45,090 INFO L87 Difference]: Start difference. First operand 36712 states and 82307 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:45,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:45,263 INFO L93 Difference]: Finished difference Result 39280 states and 87158 transitions. [2021-04-15 03:26:45,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:26:45,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:45,321 INFO L225 Difference]: With dead ends: 39280 [2021-04-15 03:26:45,321 INFO L226 Difference]: Without dead ends: 39278 [2021-04-15 03:26:45,321 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 45.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:45,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39278 states. [2021-04-15 03:26:46,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39278 to 36836. [2021-04-15 03:26:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36836 states, 36835 states have (on average 2.2415365820551107) internal successors, (82567), 36835 states have internal predecessors, (82567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:46,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36836 states to 36836 states and 82567 transitions. [2021-04-15 03:26:46,252 INFO L78 Accepts]: Start accepts. Automaton has 36836 states and 82567 transitions. Word has length 56 [2021-04-15 03:26:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:46,253 INFO L480 AbstractCegarLoop]: Abstraction has 36836 states and 82567 transitions. [2021-04-15 03:26:46,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:46,253 INFO L276 IsEmpty]: Start isEmpty. Operand 36836 states and 82567 transitions. [2021-04-15 03:26:46,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:46,283 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:46,283 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:46,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:46,484 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:46,485 INFO L82 PathProgramCache]: Analyzing trace with hash 589323366, now seen corresponding path program 51 times [2021-04-15 03:26:46,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:46,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782347681] [2021-04-15 03:26:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:46,515 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:46,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782347681] [2021-04-15 03:26:46,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398342138] [2021-04-15 03:26:46,516 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 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 [2021-04-15 03:26:46,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 03:26:46,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:46,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:26:46,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-04-15 03:26:46,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:46,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-04-15 03:26:46,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28561951] [2021-04-15 03:26:46,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:26:46,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:46,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:26:46,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:26:46,653 INFO L87 Difference]: Start difference. First operand 36836 states and 82567 transitions. Second operand has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:47,532 INFO L93 Difference]: Finished difference Result 65704 states and 142418 transitions. [2021-04-15 03:26:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-04-15 03:26:47,533 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:47,636 INFO L225 Difference]: With dead ends: 65704 [2021-04-15 03:26:47,636 INFO L226 Difference]: Without dead ends: 65560 [2021-04-15 03:26:47,637 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 383.6ms TimeCoverageRelationStatistics Valid=437, Invalid=2755, Unknown=0, NotChecked=0, Total=3192 [2021-04-15 03:26:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65560 states. [2021-04-15 03:26:48,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65560 to 50470. [2021-04-15 03:26:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50470 states, 50469 states have (on average 2.2044225167924867) internal successors, (111255), 50469 states have internal predecessors, (111255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:48,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50470 states to 50470 states and 111255 transitions. [2021-04-15 03:26:48,753 INFO L78 Accepts]: Start accepts. Automaton has 50470 states and 111255 transitions. Word has length 56 [2021-04-15 03:26:48,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:48,753 INFO L480 AbstractCegarLoop]: Abstraction has 50470 states and 111255 transitions. [2021-04-15 03:26:48,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.266666666666667) internal successors, (94), 14 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:48,753 INFO L276 IsEmpty]: Start isEmpty. Operand 50470 states and 111255 transitions. [2021-04-15 03:26:48,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:48,786 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:48,786 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:48,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-04-15 03:26:48,986 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:48,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:48,987 INFO L82 PathProgramCache]: Analyzing trace with hash 773052453, now seen corresponding path program 52 times [2021-04-15 03:26:48,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:48,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482231232] [2021-04-15 03:26:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:49,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482231232] [2021-04-15 03:26:49,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227392951] [2021-04-15 03:26:49,020 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 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 [2021-04-15 03:26:49,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:26:49,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:49,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:49,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:49,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:49,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:26:49,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5160418] [2021-04-15 03:26:49,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:26:49,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:49,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:26:49,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:26:49,293 INFO L87 Difference]: Start difference. First operand 50470 states and 111255 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:49,541 INFO L93 Difference]: Finished difference Result 57450 states and 125218 transitions. [2021-04-15 03:26:49,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:26:49,542 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:49,625 INFO L225 Difference]: With dead ends: 57450 [2021-04-15 03:26:49,626 INFO L226 Difference]: Without dead ends: 57432 [2021-04-15 03:26:49,626 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 58.1ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:26:49,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57432 states. [2021-04-15 03:26:50,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57432 to 50730. [2021-04-15 03:26:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50730 states, 50729 states have (on average 2.2019554889708055) internal successors, (111703), 50729 states have internal predecessors, (111703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50730 states to 50730 states and 111703 transitions. [2021-04-15 03:26:50,521 INFO L78 Accepts]: Start accepts. Automaton has 50730 states and 111703 transitions. Word has length 56 [2021-04-15 03:26:50,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:50,521 INFO L480 AbstractCegarLoop]: Abstraction has 50730 states and 111703 transitions. [2021-04-15 03:26:50,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:50,521 INFO L276 IsEmpty]: Start isEmpty. Operand 50730 states and 111703 transitions. [2021-04-15 03:26:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:50,558 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:50,558 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:50,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:50,759 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:50,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:50,759 INFO L82 PathProgramCache]: Analyzing trace with hash -2069049913, now seen corresponding path program 53 times [2021-04-15 03:26:50,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:50,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528145945] [2021-04-15 03:26:50,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:50,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528145945] [2021-04-15 03:26:50,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567190727] [2021-04-15 03:26:50,797 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 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 [2021-04-15 03:26:50,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 03:26:50,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:50,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:50,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:26:50,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:50,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:26:50,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12179206] [2021-04-15 03:26:50,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:26:50,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:50,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:26:50,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:26:50,899 INFO L87 Difference]: Start difference. First operand 50730 states and 111703 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:51,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:51,269 INFO L93 Difference]: Finished difference Result 53406 states and 116710 transitions. [2021-04-15 03:26:51,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:26:51,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:51,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:51,350 INFO L225 Difference]: With dead ends: 53406 [2021-04-15 03:26:51,350 INFO L226 Difference]: Without dead ends: 53388 [2021-04-15 03:26:51,350 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:26:51,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53388 states. [2021-04-15 03:26:52,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53388 to 45578. [2021-04-15 03:26:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45578 states, 45577 states have (on average 2.197402198477302) internal successors, (100151), 45577 states have internal predecessors, (100151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:52,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45578 states to 45578 states and 100151 transitions. [2021-04-15 03:26:52,193 INFO L78 Accepts]: Start accepts. Automaton has 45578 states and 100151 transitions. Word has length 56 [2021-04-15 03:26:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:52,193 INFO L480 AbstractCegarLoop]: Abstraction has 45578 states and 100151 transitions. [2021-04-15 03:26:52,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:52,193 INFO L276 IsEmpty]: Start isEmpty. Operand 45578 states and 100151 transitions. [2021-04-15 03:26:52,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:52,220 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:52,220 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:52,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-04-15 03:26:52,425 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:52,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:52,425 INFO L82 PathProgramCache]: Analyzing trace with hash -361343013, now seen corresponding path program 54 times [2021-04-15 03:26:52,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:52,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127799447] [2021-04-15 03:26:52,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-04-15 03:26:52,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127799447] [2021-04-15 03:26:52,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832203613] [2021-04-15 03:26:52,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:52,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 03:26:52,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:52,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:52,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 33 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-04-15 03:26:52,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:52,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:26:52,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042557514] [2021-04-15 03:26:52,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:26:52,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:52,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:26:52,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:26:52,561 INFO L87 Difference]: Start difference. First operand 45578 states and 100151 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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) [2021-04-15 03:26:52,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:52,789 INFO L93 Difference]: Finished difference Result 49711 states and 108806 transitions. [2021-04-15 03:26:52,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:26:52,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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 56 [2021-04-15 03:26:52,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:52,859 INFO L225 Difference]: With dead ends: 49711 [2021-04-15 03:26:52,859 INFO L226 Difference]: Without dead ends: 49645 [2021-04-15 03:26:52,859 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:26:52,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49645 states. [2021-04-15 03:26:53,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49645 to 48590. [2021-04-15 03:26:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48590 states, 48589 states have (on average 2.2018769680380332) internal successors, (106987), 48589 states have internal predecessors, (106987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48590 states to 48590 states and 106987 transitions. [2021-04-15 03:26:53,720 INFO L78 Accepts]: Start accepts. Automaton has 48590 states and 106987 transitions. Word has length 56 [2021-04-15 03:26:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:53,720 INFO L480 AbstractCegarLoop]: Abstraction has 48590 states and 106987 transitions. [2021-04-15 03:26:53,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 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) [2021-04-15 03:26:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 48590 states and 106987 transitions. [2021-04-15 03:26:53,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:53,748 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:53,748 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:53,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:53,948 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:53,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:53,948 INFO L82 PathProgramCache]: Analyzing trace with hash -378550939, now seen corresponding path program 55 times [2021-04-15 03:26:53,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:53,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768187222] [2021-04-15 03:26:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:26:53,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768187222] [2021-04-15 03:26:53,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403419939] [2021-04-15 03:26:53,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:54,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:54,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 46 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:26:54,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:54,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:54,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132507904] [2021-04-15 03:26:54,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:54,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:54,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:54,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:54,083 INFO L87 Difference]: Start difference. First operand 48590 states and 106987 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:54,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:54,467 INFO L93 Difference]: Finished difference Result 51903 states and 113860 transitions. [2021-04-15 03:26:54,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:26:54,467 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:54,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:54,542 INFO L225 Difference]: With dead ends: 51903 [2021-04-15 03:26:54,543 INFO L226 Difference]: Without dead ends: 51867 [2021-04-15 03:26:54,543 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:54,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51867 states. [2021-04-15 03:26:55,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51867 to 50962. [2021-04-15 03:26:55,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50962 states, 50961 states have (on average 2.2042542336296385) internal successors, (112331), 50961 states have internal predecessors, (112331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50962 states to 50962 states and 112331 transitions. [2021-04-15 03:26:55,466 INFO L78 Accepts]: Start accepts. Automaton has 50962 states and 112331 transitions. Word has length 56 [2021-04-15 03:26:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:55,466 INFO L480 AbstractCegarLoop]: Abstraction has 50962 states and 112331 transitions. [2021-04-15 03:26:55,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:55,466 INFO L276 IsEmpty]: Start isEmpty. Operand 50962 states and 112331 transitions. [2021-04-15 03:26:55,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:55,501 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:55,501 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:55,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-04-15 03:26:55,702 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:55,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:55,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1368047205, now seen corresponding path program 56 times [2021-04-15 03:26:55,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:55,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442363949] [2021-04-15 03:26:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:55,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442363949] [2021-04-15 03:26:55,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851826282] [2021-04-15 03:26:55,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:55,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:26:55,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:55,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:55,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 63 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:55,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:55,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:55,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289434817] [2021-04-15 03:26:55,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:55,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:55,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:55,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:55,821 INFO L87 Difference]: Start difference. First operand 50962 states and 112331 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:56,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:56,061 INFO L93 Difference]: Finished difference Result 54564 states and 119631 transitions. [2021-04-15 03:26:56,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:26:56,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:56,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:56,152 INFO L225 Difference]: With dead ends: 54564 [2021-04-15 03:26:56,152 INFO L226 Difference]: Without dead ends: 54522 [2021-04-15 03:26:56,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:56,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54522 states. [2021-04-15 03:26:57,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54522 to 50922. [2021-04-15 03:26:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50922 states, 50921 states have (on average 2.2044932346183304) internal successors, (112255), 50921 states have internal predecessors, (112255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:57,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50922 states to 50922 states and 112255 transitions. [2021-04-15 03:26:57,170 INFO L78 Accepts]: Start accepts. Automaton has 50922 states and 112255 transitions. Word has length 56 [2021-04-15 03:26:57,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:57,171 INFO L480 AbstractCegarLoop]: Abstraction has 50922 states and 112255 transitions. [2021-04-15 03:26:57,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:57,171 INFO L276 IsEmpty]: Start isEmpty. Operand 50922 states and 112255 transitions. [2021-04-15 03:26:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:57,200 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:57,200 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:57,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:57,401 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1063321585, now seen corresponding path program 57 times [2021-04-15 03:26:57,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:57,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140915894] [2021-04-15 03:26:57,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:57,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140915894] [2021-04-15 03:26:57,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681231818] [2021-04-15 03:26:57,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:26:57,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 03:26:57,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:57,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:57,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:57,537 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:57,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:57,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:26:57,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261706935] [2021-04-15 03:26:57,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:26:57,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:57,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:26:57,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:26:57,539 INFO L87 Difference]: Start difference. First operand 50922 states and 112255 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:57,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:57,765 INFO L93 Difference]: Finished difference Result 54000 states and 117977 transitions. [2021-04-15 03:26:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:26:57,765 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:57,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:57,846 INFO L225 Difference]: With dead ends: 54000 [2021-04-15 03:26:57,846 INFO L226 Difference]: Without dead ends: 53998 [2021-04-15 03:26:57,847 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:26:57,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53998 states. [2021-04-15 03:26:58,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53998 to 51006. [2021-04-15 03:26:58,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51006 states, 51005 states have (on average 2.203842760513675) internal successors, (112407), 51005 states have internal predecessors, (112407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51006 states to 51006 states and 112407 transitions. [2021-04-15 03:26:58,852 INFO L78 Accepts]: Start accepts. Automaton has 51006 states and 112407 transitions. Word has length 56 [2021-04-15 03:26:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:26:58,852 INFO L480 AbstractCegarLoop]: Abstraction has 51006 states and 112407 transitions. [2021-04-15 03:26:58,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:58,852 INFO L276 IsEmpty]: Start isEmpty. Operand 51006 states and 112407 transitions. [2021-04-15 03:26:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:26:58,886 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:26:58,887 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:26:59,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-04-15 03:26:59,087 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:26:59,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:26:59,087 INFO L82 PathProgramCache]: Analyzing trace with hash -673117659, now seen corresponding path program 58 times [2021-04-15 03:26:59,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:26:59,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957349510] [2021-04-15 03:26:59,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:26:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:26:59,118 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:59,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957349510] [2021-04-15 03:26:59,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610745886] [2021-04-15 03:26:59,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:26:59,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:26:59,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:26:59,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:26:59,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:26:59,406 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-04-15 03:26:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:26:59,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:26:59,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:26:59,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070190896] [2021-04-15 03:26:59,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:26:59,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:26:59,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:26:59,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:26:59,488 INFO L87 Difference]: Start difference. First operand 51006 states and 112407 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:26:59,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:26:59,735 INFO L93 Difference]: Finished difference Result 57784 states and 125981 transitions. [2021-04-15 03:26:59,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:26:59,735 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:26:59,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:26:59,819 INFO L225 Difference]: With dead ends: 57784 [2021-04-15 03:26:59,819 INFO L226 Difference]: Without dead ends: 57782 [2021-04-15 03:26:59,820 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:26:59,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57782 states. [2021-04-15 03:27:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57782 to 51426. [2021-04-15 03:27:00,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51426 states, 51425 states have (on average 2.202566844919786) internal successors, (113267), 51425 states have internal predecessors, (113267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51426 states to 51426 states and 113267 transitions. [2021-04-15 03:27:00,850 INFO L78 Accepts]: Start accepts. Automaton has 51426 states and 113267 transitions. Word has length 56 [2021-04-15 03:27:00,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:00,851 INFO L480 AbstractCegarLoop]: Abstraction has 51426 states and 113267 transitions. [2021-04-15 03:27:00,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:00,851 INFO L276 IsEmpty]: Start isEmpty. Operand 51426 states and 113267 transitions. [2021-04-15 03:27:00,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:27:00,882 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:00,882 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:01,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-04-15 03:27:01,083 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:01,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:01,083 INFO L82 PathProgramCache]: Analyzing trace with hash 779747271, now seen corresponding path program 59 times [2021-04-15 03:27:01,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:01,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790781429] [2021-04-15 03:27:01,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:01,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790781429] [2021-04-15 03:27:01,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915173187] [2021-04-15 03:27:01,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:01,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 03:27:01,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:01,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:01,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:01,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:01,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:27:01,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187267425] [2021-04-15 03:27:01,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:27:01,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:01,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:27:01,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:27:01,236 INFO L87 Difference]: Start difference. First operand 51426 states and 113267 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:01,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:01,509 INFO L93 Difference]: Finished difference Result 56504 states and 123265 transitions. [2021-04-15 03:27:01,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:01,509 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:27:01,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:01,595 INFO L225 Difference]: With dead ends: 56504 [2021-04-15 03:27:01,595 INFO L226 Difference]: Without dead ends: 56502 [2021-04-15 03:27:01,595 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:27:01,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56502 states. [2021-04-15 03:27:02,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56502 to 51506. [2021-04-15 03:27:02,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51506 states, 51505 states have (on average 2.2005436365401416) internal successors, (113339), 51505 states have internal predecessors, (113339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:02,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51506 states to 51506 states and 113339 transitions. [2021-04-15 03:27:02,576 INFO L78 Accepts]: Start accepts. Automaton has 51506 states and 113339 transitions. Word has length 56 [2021-04-15 03:27:02,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:02,577 INFO L480 AbstractCegarLoop]: Abstraction has 51506 states and 113339 transitions. [2021-04-15 03:27:02,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:02,577 INFO L276 IsEmpty]: Start isEmpty. Operand 51506 states and 113339 transitions. [2021-04-15 03:27:02,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:27:02,608 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:02,608 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:02,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:02,813 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:02,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:02,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1081723995, now seen corresponding path program 60 times [2021-04-15 03:27:02,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:02,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378043425] [2021-04-15 03:27:02,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:02,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378043425] [2021-04-15 03:27:02,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120523954] [2021-04-15 03:27:02,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:27:02,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 03:27:02,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:02,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:02,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:02,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:02,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-04-15 03:27:02,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437819461] [2021-04-15 03:27:02,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:27:02,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:02,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:27:02,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:27:02,961 INFO L87 Difference]: Start difference. First operand 51506 states and 113339 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:03,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:03,219 INFO L93 Difference]: Finished difference Result 53832 states and 117559 transitions. [2021-04-15 03:27:03,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:27:03,220 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:27:03,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:03,298 INFO L225 Difference]: With dead ends: 53832 [2021-04-15 03:27:03,298 INFO L226 Difference]: Without dead ends: 53830 [2021-04-15 03:27:03,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:27:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53830 states. [2021-04-15 03:27:04,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53830 to 49874. [2021-04-15 03:27:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49874 states, 49873 states have (on average 2.2004892426763982) internal successors, (109745), 49873 states have internal predecessors, (109745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:04,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49874 states to 49874 states and 109745 transitions. [2021-04-15 03:27:04,292 INFO L78 Accepts]: Start accepts. Automaton has 49874 states and 109745 transitions. Word has length 56 [2021-04-15 03:27:04,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:04,292 INFO L480 AbstractCegarLoop]: Abstraction has 49874 states and 109745 transitions. [2021-04-15 03:27:04,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:04,293 INFO L276 IsEmpty]: Start isEmpty. Operand 49874 states and 109745 transitions. [2021-04-15 03:27:04,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:27:04,326 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:04,326 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:04,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:04,526 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:04,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:04,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2020283719, now seen corresponding path program 61 times [2021-04-15 03:27:04,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:04,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994379672] [2021-04-15 03:27:04,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:04,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 03:27:04,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994379672] [2021-04-15 03:27:04,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225391284] [2021-04-15 03:27:04,571 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 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 [2021-04-15 03:27:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:04,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:04,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 03:27:04,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:04,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-04-15 03:27:04,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248356204] [2021-04-15 03:27:04,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:27:04,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:04,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:27:04,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:27:04,661 INFO L87 Difference]: Start difference. First operand 49874 states and 109745 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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) [2021-04-15 03:27:05,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:05,119 INFO L93 Difference]: Finished difference Result 51331 states and 112086 transitions. [2021-04-15 03:27:05,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:27:05,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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 56 [2021-04-15 03:27:05,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:05,188 INFO L225 Difference]: With dead ends: 51331 [2021-04-15 03:27:05,188 INFO L226 Difference]: Without dead ends: 51235 [2021-04-15 03:27:05,189 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:27:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51235 states. [2021-04-15 03:27:05,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51235 to 47230. [2021-04-15 03:27:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.193673378644477) internal successors, (103605), 47229 states have internal predecessors, (103605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103605 transitions. [2021-04-15 03:27:05,847 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103605 transitions. Word has length 56 [2021-04-15 03:27:05,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:05,847 INFO L480 AbstractCegarLoop]: Abstraction has 47230 states and 103605 transitions. [2021-04-15 03:27:05,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 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) [2021-04-15 03:27:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103605 transitions. [2021-04-15 03:27:05,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:27:05,885 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:05,886 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:06,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-04-15 03:27:06,086 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:06,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:06,087 INFO L82 PathProgramCache]: Analyzing trace with hash 517101275, now seen corresponding path program 62 times [2021-04-15 03:27:06,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:06,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300624569] [2021-04-15 03:27:06,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 03:27:06,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300624569] [2021-04-15 03:27:06,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815657853] [2021-04-15 03:27:06,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:06,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:27:06,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:06,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:06,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-04-15 03:27:06,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:06,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:27:06,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354023023] [2021-04-15 03:27:06,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:27:06,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:06,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:27:06,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:27:06,399 INFO L87 Difference]: Start difference. First operand 47230 states and 103605 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:06,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:06,641 INFO L93 Difference]: Finished difference Result 48435 states and 105506 transitions. [2021-04-15 03:27:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:06,642 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:27:06,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:06,697 INFO L225 Difference]: With dead ends: 48435 [2021-04-15 03:27:06,698 INFO L226 Difference]: Without dead ends: 48369 [2021-04-15 03:27:06,698 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:06,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48369 states. [2021-04-15 03:27:07,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48369 to 47230. [2021-04-15 03:27:07,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.1912172605814226) internal successors, (103489), 47229 states have internal predecessors, (103489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:07,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103489 transitions. [2021-04-15 03:27:07,679 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103489 transitions. Word has length 56 [2021-04-15 03:27:07,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:07,680 INFO L480 AbstractCegarLoop]: Abstraction has 47230 states and 103489 transitions. [2021-04-15 03:27:07,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:07,680 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103489 transitions. [2021-04-15 03:27:07,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:27:07,708 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:07,708 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:07,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:07,909 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:07,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:07,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1809607417, now seen corresponding path program 63 times [2021-04-15 03:27:07,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:07,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427855464] [2021-04-15 03:27:07,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 03:27:07,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427855464] [2021-04-15 03:27:07,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025831452] [2021-04-15 03:27:07,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:07,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 03:27:07,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:07,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:07,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:08,053 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 03:27:08,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:08,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:27:08,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289844832] [2021-04-15 03:27:08,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:27:08,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:08,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:27:08,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:27:08,054 INFO L87 Difference]: Start difference. First operand 47230 states and 103489 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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) [2021-04-15 03:27:08,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:08,256 INFO L93 Difference]: Finished difference Result 48187 states and 104966 transitions. [2021-04-15 03:27:08,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:27:08,256 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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 56 [2021-04-15 03:27:08,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:08,321 INFO L225 Difference]: With dead ends: 48187 [2021-04-15 03:27:08,321 INFO L226 Difference]: Without dead ends: 48151 [2021-04-15 03:27:08,321 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:08,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48151 states. [2021-04-15 03:27:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48151 to 47230. [2021-04-15 03:27:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47230 states, 47229 states have (on average 2.1896927735078022) internal successors, (103417), 47229 states have internal predecessors, (103417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47230 states to 47230 states and 103417 transitions. [2021-04-15 03:27:09,368 INFO L78 Accepts]: Start accepts. Automaton has 47230 states and 103417 transitions. Word has length 56 [2021-04-15 03:27:09,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:09,369 INFO L480 AbstractCegarLoop]: Abstraction has 47230 states and 103417 transitions. [2021-04-15 03:27:09,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 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) [2021-04-15 03:27:09,369 INFO L276 IsEmpty]: Start isEmpty. Operand 47230 states and 103417 transitions. [2021-04-15 03:27:09,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:27:09,404 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:09,404 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:09,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-04-15 03:27:09,605 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:09,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:09,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2068840347, now seen corresponding path program 64 times [2021-04-15 03:27:09,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:09,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107004144] [2021-04-15 03:27:09,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:09,638 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:09,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107004144] [2021-04-15 03:27:09,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212096140] [2021-04-15 03:27:09,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:09,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:27:09,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:09,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:09,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:09,737 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:09,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:09,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:27:09,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334884177] [2021-04-15 03:27:09,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:27:09,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:09,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:27:09,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:27:09,738 INFO L87 Difference]: Start difference. First operand 47230 states and 103417 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:09,965 INFO L93 Difference]: Finished difference Result 51250 states and 111816 transitions. [2021-04-15 03:27:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:27:09,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:27:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:10,048 INFO L225 Difference]: With dead ends: 51250 [2021-04-15 03:27:10,048 INFO L226 Difference]: Without dead ends: 51244 [2021-04-15 03:27:10,049 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:27:10,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51244 states. [2021-04-15 03:27:10,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51244 to 50262. [2021-04-15 03:27:10,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50262 states, 50261 states have (on average 2.194723543104992) internal successors, (110309), 50261 states have internal predecessors, (110309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50262 states to 50262 states and 110309 transitions. [2021-04-15 03:27:11,034 INFO L78 Accepts]: Start accepts. Automaton has 50262 states and 110309 transitions. Word has length 56 [2021-04-15 03:27:11,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:11,035 INFO L480 AbstractCegarLoop]: Abstraction has 50262 states and 110309 transitions. [2021-04-15 03:27:11,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:11,035 INFO L276 IsEmpty]: Start isEmpty. Operand 50262 states and 110309 transitions. [2021-04-15 03:27:11,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:27:11,073 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:11,073 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:11,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:11,274 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:11,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:11,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1921401329, now seen corresponding path program 65 times [2021-04-15 03:27:11,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:11,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939443542] [2021-04-15 03:27:11,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:11,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939443542] [2021-04-15 03:27:11,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100741057] [2021-04-15 03:27:11,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:11,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 03:27:11,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:11,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:11,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:11,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:11,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:27:11,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370423845] [2021-04-15 03:27:11,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:27:11,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:11,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:27:11,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:27:11,420 INFO L87 Difference]: Start difference. First operand 50262 states and 110309 transitions. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:11,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:11,654 INFO L93 Difference]: Finished difference Result 52650 states and 114688 transitions. [2021-04-15 03:27:11,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:27:11,655 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:27:11,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:11,743 INFO L225 Difference]: With dead ends: 52650 [2021-04-15 03:27:11,744 INFO L226 Difference]: Without dead ends: 52650 [2021-04-15 03:27:11,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:27:11,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52650 states. [2021-04-15 03:27:12,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52650 to 50294. [2021-04-15 03:27:12,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50294 states, 50293 states have (on average 2.1945996460740065) internal successors, (110373), 50293 states have internal predecessors, (110373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:12,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50294 states to 50294 states and 110373 transitions. [2021-04-15 03:27:12,699 INFO L78 Accepts]: Start accepts. Automaton has 50294 states and 110373 transitions. Word has length 56 [2021-04-15 03:27:12,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:12,699 INFO L480 AbstractCegarLoop]: Abstraction has 50294 states and 110373 transitions. [2021-04-15 03:27:12,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 7 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:12,699 INFO L276 IsEmpty]: Start isEmpty. Operand 50294 states and 110373 transitions. [2021-04-15 03:27:12,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:27:12,734 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:12,734 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:12,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-04-15 03:27:12,935 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:12,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:12,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1531197403, now seen corresponding path program 66 times [2021-04-15 03:27:12,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:12,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581846023] [2021-04-15 03:27:12,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:12,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581846023] [2021-04-15 03:27:12,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317666517] [2021-04-15 03:27:12,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:13,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 03:27:13,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:13,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:13,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:13,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:13,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:27:13,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464233750] [2021-04-15 03:27:13,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:27:13,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:13,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:27:13,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:27:13,073 INFO L87 Difference]: Start difference. First operand 50294 states and 110373 transitions. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:13,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:13,320 INFO L93 Difference]: Finished difference Result 56418 states and 122592 transitions. [2021-04-15 03:27:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:27:13,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:27:13,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:13,411 INFO L225 Difference]: With dead ends: 56418 [2021-04-15 03:27:13,411 INFO L226 Difference]: Without dead ends: 56418 [2021-04-15 03:27:13,411 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:27:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56418 states. [2021-04-15 03:27:14,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56418 to 50454. [2021-04-15 03:27:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50454 states, 50453 states have (on average 2.193982518383446) internal successors, (110693), 50453 states have internal predecessors, (110693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:14,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50454 states to 50454 states and 110693 transitions. [2021-04-15 03:27:14,448 INFO L78 Accepts]: Start accepts. Automaton has 50454 states and 110693 transitions. Word has length 56 [2021-04-15 03:27:14,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:14,448 INFO L480 AbstractCegarLoop]: Abstraction has 50454 states and 110693 transitions. [2021-04-15 03:27:14,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:14,448 INFO L276 IsEmpty]: Start isEmpty. Operand 50454 states and 110693 transitions. [2021-04-15 03:27:14,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:27:14,482 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:14,482 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:14,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:14,683 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:14,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:14,684 INFO L82 PathProgramCache]: Analyzing trace with hash -78332473, now seen corresponding path program 67 times [2021-04-15 03:27:14,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:14,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767853872] [2021-04-15 03:27:14,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:14,728 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:14,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767853872] [2021-04-15 03:27:14,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047025027] [2021-04-15 03:27:14,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:14,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:14,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:14,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:14,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:27:14,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470175857] [2021-04-15 03:27:14,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:27:14,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:14,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:27:14,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:27:14,833 INFO L87 Difference]: Start difference. First operand 50454 states and 110693 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:15,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:15,139 INFO L93 Difference]: Finished difference Result 56662 states and 123166 transitions. [2021-04-15 03:27:15,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:27:15,139 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:27:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:15,229 INFO L225 Difference]: With dead ends: 56662 [2021-04-15 03:27:15,229 INFO L226 Difference]: Without dead ends: 56662 [2021-04-15 03:27:15,230 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:27:15,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56662 states. [2021-04-15 03:27:16,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56662 to 50614. [2021-04-15 03:27:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50614 states, 50613 states have (on average 2.1933692924742654) internal successors, (111013), 50613 states have internal predecessors, (111013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:16,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50614 states to 50614 states and 111013 transitions. [2021-04-15 03:27:16,286 INFO L78 Accepts]: Start accepts. Automaton has 50614 states and 111013 transitions. Word has length 56 [2021-04-15 03:27:16,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:16,286 INFO L480 AbstractCegarLoop]: Abstraction has 50614 states and 111013 transitions. [2021-04-15 03:27:16,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:16,286 INFO L276 IsEmpty]: Start isEmpty. Operand 50614 states and 111013 transitions. [2021-04-15 03:27:16,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:27:16,319 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:16,319 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:16,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-04-15 03:27:16,519 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:16,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:16,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1939803739, now seen corresponding path program 68 times [2021-04-15 03:27:16,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:16,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549822775] [2021-04-15 03:27:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:16,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549822775] [2021-04-15 03:27:16,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028296292] [2021-04-15 03:27:16,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:16,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:27:16,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:16,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:16,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 37 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:16,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:16,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-04-15 03:27:16,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002805935] [2021-04-15 03:27:16,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:27:16,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:16,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:27:16,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:27:16,659 INFO L87 Difference]: Start difference. First operand 50614 states and 111013 transitions. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:16,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:16,948 INFO L93 Difference]: Finished difference Result 54674 states and 118916 transitions. [2021-04-15 03:27:16,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:27:16,949 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:27:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:17,021 INFO L225 Difference]: With dead ends: 54674 [2021-04-15 03:27:17,021 INFO L226 Difference]: Without dead ends: 54674 [2021-04-15 03:27:17,021 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:27:17,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54674 states. [2021-04-15 03:27:17,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54674 to 50774. [2021-04-15 03:27:17,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50774 states, 50773 states have (on average 2.192759931459634) internal successors, (111333), 50773 states have internal predecessors, (111333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50774 states to 50774 states and 111333 transitions. [2021-04-15 03:27:18,070 INFO L78 Accepts]: Start accepts. Automaton has 50774 states and 111333 transitions. Word has length 56 [2021-04-15 03:27:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:18,070 INFO L480 AbstractCegarLoop]: Abstraction has 50774 states and 111333 transitions. [2021-04-15 03:27:18,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 50774 states and 111333 transitions. [2021-04-15 03:27:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-04-15 03:27:18,106 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:18,106 INFO L551 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:18,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:18,307 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:18,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:18,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1664826169, now seen corresponding path program 69 times [2021-04-15 03:27:18,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:18,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246318273] [2021-04-15 03:27:18,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:18,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246318273] [2021-04-15 03:27:18,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362768619] [2021-04-15 03:27:18,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:18,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-04-15 03:27:18,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:18,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:27:18,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 35 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:18,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:18,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:27:18,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389281534] [2021-04-15 03:27:18,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:27:18,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:18,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:27:18,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:27:18,474 INFO L87 Difference]: Start difference. First operand 50774 states and 111333 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:18,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:18,759 INFO L93 Difference]: Finished difference Result 52880 states and 115293 transitions. [2021-04-15 03:27:18,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:27:18,760 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-04-15 03:27:18,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:19,135 INFO L225 Difference]: With dead ends: 52880 [2021-04-15 03:27:19,136 INFO L226 Difference]: Without dead ends: 52880 [2021-04-15 03:27:19,136 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:27:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52880 states. [2021-04-15 03:27:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52880 to 49354. [2021-04-15 03:27:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49354 states, 49353 states have (on average 2.193686300731465) internal successors, (108265), 49353 states have internal predecessors, (108265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:19,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49354 states to 49354 states and 108265 transitions. [2021-04-15 03:27:19,817 INFO L78 Accepts]: Start accepts. Automaton has 49354 states and 108265 transitions. Word has length 56 [2021-04-15 03:27:19,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:19,817 INFO L480 AbstractCegarLoop]: Abstraction has 49354 states and 108265 transitions. [2021-04-15 03:27:19,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:19,817 INFO L276 IsEmpty]: Start isEmpty. Operand 49354 states and 108265 transitions. [2021-04-15 03:27:19,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:19,864 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:19,864 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:20,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:20,066 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:20,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:20,066 INFO L82 PathProgramCache]: Analyzing trace with hash -418208773, now seen corresponding path program 70 times [2021-04-15 03:27:20,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:20,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597272351] [2021-04-15 03:27:20,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:20,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597272351] [2021-04-15 03:27:20,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604050076] [2021-04-15 03:27:20,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:20,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:27:20,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:20,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:20,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:20,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:20,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-04-15 03:27:20,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821394354] [2021-04-15 03:27:20,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:27:20,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:20,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:27:20,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:27:20,255 INFO L87 Difference]: Start difference. First operand 49354 states and 108265 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:20,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:20,810 INFO L93 Difference]: Finished difference Result 55302 states and 120443 transitions. [2021-04-15 03:27:20,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:20,811 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:20,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:20,897 INFO L225 Difference]: With dead ends: 55302 [2021-04-15 03:27:20,898 INFO L226 Difference]: Without dead ends: 55302 [2021-04-15 03:27:20,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 355.3ms TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:27:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55302 states. [2021-04-15 03:27:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55302 to 49998. [2021-04-15 03:27:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49998 states, 49997 states have (on average 2.195831749904994) internal successors, (109785), 49997 states have internal predecessors, (109785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49998 states to 49998 states and 109785 transitions. [2021-04-15 03:27:21,748 INFO L78 Accepts]: Start accepts. Automaton has 49998 states and 109785 transitions. Word has length 66 [2021-04-15 03:27:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:21,749 INFO L480 AbstractCegarLoop]: Abstraction has 49998 states and 109785 transitions. [2021-04-15 03:27:21,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 49998 states and 109785 transitions. [2021-04-15 03:27:21,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:21,807 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:21,807 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:22,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:22,008 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:22,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:22,008 INFO L82 PathProgramCache]: Analyzing trace with hash -12185795, now seen corresponding path program 71 times [2021-04-15 03:27:22,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:22,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950119330] [2021-04-15 03:27:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:22,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950119330] [2021-04-15 03:27:22,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631275216] [2021-04-15 03:27:22,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:27:22,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 03:27:22,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:22,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:22,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:22,378 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-04-15 03:27:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 67 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:22,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:22,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:27:22,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656683955] [2021-04-15 03:27:22,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:27:22,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:22,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:27:22,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:27:22,435 INFO L87 Difference]: Start difference. First operand 49998 states and 109785 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:22,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:22,683 INFO L93 Difference]: Finished difference Result 51084 states and 111615 transitions. [2021-04-15 03:27:22,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:22,684 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:22,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:22,768 INFO L225 Difference]: With dead ends: 51084 [2021-04-15 03:27:22,769 INFO L226 Difference]: Without dead ends: 51076 [2021-04-15 03:27:22,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:22,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51076 states. [2021-04-15 03:27:23,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51076 to 49894. [2021-04-15 03:27:23,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49894 states, 49893 states have (on average 2.193995149620187) internal successors, (109465), 49893 states have internal predecessors, (109465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49894 states to 49894 states and 109465 transitions. [2021-04-15 03:27:23,546 INFO L78 Accepts]: Start accepts. Automaton has 49894 states and 109465 transitions. Word has length 66 [2021-04-15 03:27:23,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:23,547 INFO L480 AbstractCegarLoop]: Abstraction has 49894 states and 109465 transitions. [2021-04-15 03:27:23,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:23,547 INFO L276 IsEmpty]: Start isEmpty. Operand 49894 states and 109465 transitions. [2021-04-15 03:27:23,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:23,594 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:23,594 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:23,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:23,794 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:23,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:23,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1308699737, now seen corresponding path program 72 times [2021-04-15 03:27:23,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:23,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988830371] [2021-04-15 03:27:23,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:23,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988830371] [2021-04-15 03:27:23,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933494235] [2021-04-15 03:27:23,827 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:23,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:27:23,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:23,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:23,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:24,127 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-04-15 03:27:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 40 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:24,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:24,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:27:24,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181138850] [2021-04-15 03:27:24,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:27:24,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:24,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:27:24,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:27:24,197 INFO L87 Difference]: Start difference. First operand 49894 states and 109465 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:24,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:24,436 INFO L93 Difference]: Finished difference Result 58739 states and 127815 transitions. [2021-04-15 03:27:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:24,437 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:24,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:24,518 INFO L225 Difference]: With dead ends: 58739 [2021-04-15 03:27:24,518 INFO L226 Difference]: Without dead ends: 58739 [2021-04-15 03:27:24,518 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58739 states. [2021-04-15 03:27:25,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58739 to 53954. [2021-04-15 03:27:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53954 states, 53953 states have (on average 2.204678145793561) internal successors, (118949), 53953 states have internal predecessors, (118949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:25,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53954 states to 53954 states and 118949 transitions. [2021-04-15 03:27:25,565 INFO L78 Accepts]: Start accepts. Automaton has 53954 states and 118949 transitions. Word has length 66 [2021-04-15 03:27:25,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:25,565 INFO L480 AbstractCegarLoop]: Abstraction has 53954 states and 118949 transitions. [2021-04-15 03:27:25,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 53954 states and 118949 transitions. [2021-04-15 03:27:25,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:25,613 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:25,613 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:25,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:25,814 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:25,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:25,814 INFO L82 PathProgramCache]: Analyzing trace with hash -138643737, now seen corresponding path program 73 times [2021-04-15 03:27:25,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:25,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177508226] [2021-04-15 03:27:25,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:25,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177508226] [2021-04-15 03:27:25,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195671549] [2021-04-15 03:27:25,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:27:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:25,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:25,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:25,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:25,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:27:25,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447935240] [2021-04-15 03:27:25,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:27:25,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:25,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:27:25,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:27:25,946 INFO L87 Difference]: Start difference. First operand 53954 states and 118949 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:26,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:26,199 INFO L93 Difference]: Finished difference Result 56467 states and 123155 transitions. [2021-04-15 03:27:26,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:26,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:26,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:26,275 INFO L225 Difference]: With dead ends: 56467 [2021-04-15 03:27:26,275 INFO L226 Difference]: Without dead ends: 56375 [2021-04-15 03:27:26,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56375 states. [2021-04-15 03:27:27,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56375 to 51614. [2021-04-15 03:27:27,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51614 states, 51613 states have (on average 2.1976827543448354) internal successors, (113429), 51613 states have internal predecessors, (113429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113429 transitions. [2021-04-15 03:27:27,256 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113429 transitions. Word has length 66 [2021-04-15 03:27:27,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:27,256 INFO L480 AbstractCegarLoop]: Abstraction has 51614 states and 113429 transitions. [2021-04-15 03:27:27,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:27,256 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113429 transitions. [2021-04-15 03:27:27,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:27,304 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:27,304 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:27,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:27,504 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:27,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:27,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1619583693, now seen corresponding path program 74 times [2021-04-15 03:27:27,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:27,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057426371] [2021-04-15 03:27:27,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:27,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057426371] [2021-04-15 03:27:27,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098806719] [2021-04-15 03:27:27,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:27,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:27:27,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:27,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:27,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 63 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:27,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:27,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:27:27,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339032597] [2021-04-15 03:27:27,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:27:27,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:27,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:27:27,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:27:27,653 INFO L87 Difference]: Start difference. First operand 51614 states and 113429 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:27,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:27,965 INFO L93 Difference]: Finished difference Result 53573 states and 116784 transitions. [2021-04-15 03:27:27,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:27:27,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:27,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:28,048 INFO L225 Difference]: With dead ends: 53573 [2021-04-15 03:27:28,048 INFO L226 Difference]: Without dead ends: 53525 [2021-04-15 03:27:28,048 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:28,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53525 states. [2021-04-15 03:27:28,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53525 to 51614. [2021-04-15 03:27:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51614 states, 51613 states have (on average 2.196520256524519) internal successors, (113369), 51613 states have internal predecessors, (113369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51614 states to 51614 states and 113369 transitions. [2021-04-15 03:27:29,002 INFO L78 Accepts]: Start accepts. Automaton has 51614 states and 113369 transitions. Word has length 66 [2021-04-15 03:27:29,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:29,002 INFO L480 AbstractCegarLoop]: Abstraction has 51614 states and 113369 transitions. [2021-04-15 03:27:29,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 51614 states and 113369 transitions. [2021-04-15 03:27:29,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:29,046 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:29,046 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:29,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:29,247 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:29,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:29,247 INFO L82 PathProgramCache]: Analyzing trace with hash -607697029, now seen corresponding path program 75 times [2021-04-15 03:27:29,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:29,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261916898] [2021-04-15 03:27:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 03:27:29,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261916898] [2021-04-15 03:27:29,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076959594] [2021-04-15 03:27:29,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:29,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 03:27:29,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:29,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:29,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 03:27:29,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:29,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:27:29,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199082152] [2021-04-15 03:27:29,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:27:29,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:29,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:27:29,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:27:29,385 INFO L87 Difference]: Start difference. First operand 51614 states and 113369 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:29,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:29,640 INFO L93 Difference]: Finished difference Result 66038 states and 143412 transitions. [2021-04-15 03:27:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:29,640 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:29,736 INFO L225 Difference]: With dead ends: 66038 [2021-04-15 03:27:29,736 INFO L226 Difference]: Without dead ends: 66011 [2021-04-15 03:27:29,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:29,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66011 states. [2021-04-15 03:27:30,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66011 to 55054. [2021-04-15 03:27:30,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55054 states, 55053 states have (on average 2.1976822334840973) internal successors, (120989), 55053 states have internal predecessors, (120989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:30,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55054 states to 55054 states and 120989 transitions. [2021-04-15 03:27:30,727 INFO L78 Accepts]: Start accepts. Automaton has 55054 states and 120989 transitions. Word has length 66 [2021-04-15 03:27:30,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:30,727 INFO L480 AbstractCegarLoop]: Abstraction has 55054 states and 120989 transitions. [2021-04-15 03:27:30,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:30,728 INFO L276 IsEmpty]: Start isEmpty. Operand 55054 states and 120989 transitions. [2021-04-15 03:27:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:30,773 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:30,773 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:30,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-04-15 03:27:30,974 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:30,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:30,974 INFO L82 PathProgramCache]: Analyzing trace with hash -321373819, now seen corresponding path program 76 times [2021-04-15 03:27:30,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:30,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140580552] [2021-04-15 03:27:30,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:31,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140580552] [2021-04-15 03:27:31,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730937762] [2021-04-15 03:27:31,006 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:31,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:27:31,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:31,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:31,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:31,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:31,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:27:31,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995565520] [2021-04-15 03:27:31,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:27:31,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:31,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:27:31,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:27:31,112 INFO L87 Difference]: Start difference. First operand 55054 states and 120989 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:31,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:31,360 INFO L93 Difference]: Finished difference Result 64613 states and 140751 transitions. [2021-04-15 03:27:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:31,360 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:31,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:31,455 INFO L225 Difference]: With dead ends: 64613 [2021-04-15 03:27:31,456 INFO L226 Difference]: Without dead ends: 64613 [2021-04-15 03:27:31,456 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64613 states. [2021-04-15 03:27:32,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64613 to 59214. [2021-04-15 03:27:32,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59214 states, 59213 states have (on average 2.2070322395419923) internal successors, (130685), 59213 states have internal predecessors, (130685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59214 states to 59214 states and 130685 transitions. [2021-04-15 03:27:32,578 INFO L78 Accepts]: Start accepts. Automaton has 59214 states and 130685 transitions. Word has length 66 [2021-04-15 03:27:32,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:32,578 INFO L480 AbstractCegarLoop]: Abstraction has 59214 states and 130685 transitions. [2021-04-15 03:27:32,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:32,578 INFO L276 IsEmpty]: Start isEmpty. Operand 59214 states and 130685 transitions. [2021-04-15 03:27:32,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:32,631 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:32,631 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:32,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:32,832 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:32,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:32,832 INFO L82 PathProgramCache]: Analyzing trace with hash 848682181, now seen corresponding path program 77 times [2021-04-15 03:27:32,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:32,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989282652] [2021-04-15 03:27:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:32,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989282652] [2021-04-15 03:27:32,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487017698] [2021-04-15 03:27:32,866 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 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 [2021-04-15 03:27:32,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 03:27:32,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:32,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:32,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:32,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:32,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:27:32,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906103024] [2021-04-15 03:27:32,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:27:32,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:32,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:27:32,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:27:32,970 INFO L87 Difference]: Start difference. First operand 59214 states and 130685 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:33,559 INFO L93 Difference]: Finished difference Result 61966 states and 135259 transitions. [2021-04-15 03:27:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:33,560 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:33,647 INFO L225 Difference]: With dead ends: 61966 [2021-04-15 03:27:33,647 INFO L226 Difference]: Without dead ends: 61870 [2021-04-15 03:27:33,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:33,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61870 states. [2021-04-15 03:27:34,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61870 to 56914. [2021-04-15 03:27:34,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56914 states, 56913 states have (on average 2.2002178764078506) internal successors, (125221), 56913 states have internal predecessors, (125221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56914 states to 56914 states and 125221 transitions. [2021-04-15 03:27:34,545 INFO L78 Accepts]: Start accepts. Automaton has 56914 states and 125221 transitions. Word has length 66 [2021-04-15 03:27:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:34,546 INFO L480 AbstractCegarLoop]: Abstraction has 56914 states and 125221 transitions. [2021-04-15 03:27:34,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 56914 states and 125221 transitions. [2021-04-15 03:27:34,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:34,603 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:34,603 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:34,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-04-15 03:27:34,803 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:34,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:34,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1688057685, now seen corresponding path program 78 times [2021-04-15 03:27:34,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:34,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298368656] [2021-04-15 03:27:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:34,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:34,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298368656] [2021-04-15 03:27:34,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326340563] [2021-04-15 03:27:34,840 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 [2021-04-15 03:27:34,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 03:27:34,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:34,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:34,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:35,136 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-04-15 03:27:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:35,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:35,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:27:35,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453973406] [2021-04-15 03:27:35,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:27:35,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:35,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:27:35,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:27:35,170 INFO L87 Difference]: Start difference. First operand 56914 states and 125221 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:35,449 INFO L93 Difference]: Finished difference Result 59554 states and 129655 transitions. [2021-04-15 03:27:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:27:35,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:35,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:35,535 INFO L225 Difference]: With dead ends: 59554 [2021-04-15 03:27:35,535 INFO L226 Difference]: Without dead ends: 59458 [2021-04-15 03:27:35,535 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:35,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59458 states. [2021-04-15 03:27:36,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59458 to 56894. [2021-04-15 03:27:36,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56894 states, 56893 states have (on average 2.1983548063909444) internal successors, (125071), 56893 states have internal predecessors, (125071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56894 states to 56894 states and 125071 transitions. [2021-04-15 03:27:36,589 INFO L78 Accepts]: Start accepts. Automaton has 56894 states and 125071 transitions. Word has length 66 [2021-04-15 03:27:36,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:36,590 INFO L480 AbstractCegarLoop]: Abstraction has 56894 states and 125071 transitions. [2021-04-15 03:27:36,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:36,590 INFO L276 IsEmpty]: Start isEmpty. Operand 56894 states and 125071 transitions. [2021-04-15 03:27:36,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:36,635 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:36,635 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:36,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:36,836 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:36,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:36,836 INFO L82 PathProgramCache]: Analyzing trace with hash -326026235, now seen corresponding path program 79 times [2021-04-15 03:27:36,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:36,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368047741] [2021-04-15 03:27:36,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:36,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:36,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368047741] [2021-04-15 03:27:36,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286849045] [2021-04-15 03:27:36,878 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 [2021-04-15 03:27:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:36,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:36,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 48 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:36,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:36,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-04-15 03:27:36,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338724456] [2021-04-15 03:27:36,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:27:36,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:36,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:27:36,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:27:36,982 INFO L87 Difference]: Start difference. First operand 56894 states and 125071 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:37,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:37,263 INFO L93 Difference]: Finished difference Result 59114 states and 128843 transitions. [2021-04-15 03:27:37,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:27:37,264 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:37,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:37,343 INFO L225 Difference]: With dead ends: 59114 [2021-04-15 03:27:37,343 INFO L226 Difference]: Without dead ends: 58982 [2021-04-15 03:27:37,344 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:27:37,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58982 states. [2021-04-15 03:27:38,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58982 to 56922. [2021-04-15 03:27:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56922 states, 56921 states have (on average 2.1963950036014825) internal successors, (125021), 56921 states have internal predecessors, (125021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56922 states to 56922 states and 125021 transitions. [2021-04-15 03:27:38,367 INFO L78 Accepts]: Start accepts. Automaton has 56922 states and 125021 transitions. Word has length 66 [2021-04-15 03:27:38,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:38,367 INFO L480 AbstractCegarLoop]: Abstraction has 56922 states and 125021 transitions. [2021-04-15 03:27:38,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:38,367 INFO L276 IsEmpty]: Start isEmpty. Operand 56922 states and 125021 transitions. [2021-04-15 03:27:38,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:38,414 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:38,415 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:38,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:38,615 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:38,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:38,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1465776773, now seen corresponding path program 80 times [2021-04-15 03:27:38,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:38,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84662706] [2021-04-15 03:27:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 03:27:38,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84662706] [2021-04-15 03:27:38,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585124931] [2021-04-15 03:27:38,647 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:38,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:27:38,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:38,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:38,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 20 proven. 95 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 03:27:38,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:38,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:27:38,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373215505] [2021-04-15 03:27:38,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:27:38,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:38,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:27:38,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:27:38,754 INFO L87 Difference]: Start difference. First operand 56922 states and 125021 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:39,004 INFO L93 Difference]: Finished difference Result 69297 states and 150869 transitions. [2021-04-15 03:27:39,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:27:39,004 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:39,096 INFO L225 Difference]: With dead ends: 69297 [2021-04-15 03:27:39,097 INFO L226 Difference]: Without dead ends: 69270 [2021-04-15 03:27:39,097 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:27:39,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69270 states. [2021-04-15 03:27:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69270 to 56622. [2021-04-15 03:27:40,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56622 states, 56621 states have (on average 2.1971529997704033) internal successors, (124405), 56621 states have internal predecessors, (124405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:40,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56622 states to 56622 states and 124405 transitions. [2021-04-15 03:27:40,140 INFO L78 Accepts]: Start accepts. Automaton has 56622 states and 124405 transitions. Word has length 66 [2021-04-15 03:27:40,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:40,140 INFO L480 AbstractCegarLoop]: Abstraction has 56622 states and 124405 transitions. [2021-04-15 03:27:40,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:40,140 INFO L276 IsEmpty]: Start isEmpty. Operand 56622 states and 124405 transitions. [2021-04-15 03:27:40,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:40,186 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:40,186 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:40,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:40,386 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:40,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:40,387 INFO L82 PathProgramCache]: Analyzing trace with hash -904475993, now seen corresponding path program 81 times [2021-04-15 03:27:40,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:40,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764034499] [2021-04-15 03:27:40,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:40,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764034499] [2021-04-15 03:27:40,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729546286] [2021-04-15 03:27:40,420 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:27:40,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-04-15 03:27:40,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:40,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:40,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 19 proven. 101 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:40,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:40,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:27:40,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314487097] [2021-04-15 03:27:40,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:27:40,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:40,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:27:40,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:27:40,525 INFO L87 Difference]: Start difference. First operand 56622 states and 124405 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:40,778 INFO L93 Difference]: Finished difference Result 67026 states and 146165 transitions. [2021-04-15 03:27:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:40,778 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:40,872 INFO L225 Difference]: With dead ends: 67026 [2021-04-15 03:27:40,872 INFO L226 Difference]: Without dead ends: 67023 [2021-04-15 03:27:40,872 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:40,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67023 states. [2021-04-15 03:27:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67023 to 62354. [2021-04-15 03:27:41,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62354 states, 62353 states have (on average 2.206229050727311) internal successors, (137565), 62353 states have internal predecessors, (137565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62354 states to 62354 states and 137565 transitions. [2021-04-15 03:27:42,071 INFO L78 Accepts]: Start accepts. Automaton has 62354 states and 137565 transitions. Word has length 66 [2021-04-15 03:27:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:42,071 INFO L480 AbstractCegarLoop]: Abstraction has 62354 states and 137565 transitions. [2021-04-15 03:27:42,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 62354 states and 137565 transitions. [2021-04-15 03:27:42,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:42,125 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:42,125 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:42,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:42,330 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:42,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:42,330 INFO L82 PathProgramCache]: Analyzing trace with hash 265580007, now seen corresponding path program 82 times [2021-04-15 03:27:42,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:42,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351858203] [2021-04-15 03:27:42,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:42,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351858203] [2021-04-15 03:27:42,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089086772] [2021-04-15 03:27:42,365 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:42,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:27:42,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:42,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:42,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:42,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:42,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:27:42,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727826079] [2021-04-15 03:27:42,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:27:42,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:42,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:27:42,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:27:42,468 INFO L87 Difference]: Start difference. First operand 62354 states and 137565 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:42,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:42,739 INFO L93 Difference]: Finished difference Result 65089 states and 142128 transitions. [2021-04-15 03:27:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:42,740 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:42,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:43,190 INFO L225 Difference]: With dead ends: 65089 [2021-04-15 03:27:43,190 INFO L226 Difference]: Without dead ends: 65029 [2021-04-15 03:27:43,190 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65029 states. [2021-04-15 03:27:43,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65029 to 59590. [2021-04-15 03:27:43,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.20163117353874) internal successors, (131193), 59589 states have internal predecessors, (131193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 131193 transitions. [2021-04-15 03:27:44,020 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 131193 transitions. Word has length 66 [2021-04-15 03:27:44,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:44,021 INFO L480 AbstractCegarLoop]: Abstraction has 59590 states and 131193 transitions. [2021-04-15 03:27:44,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:44,021 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 131193 transitions. [2021-04-15 03:27:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:44,073 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:44,074 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:44,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:44,275 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:44,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:44,275 INFO L82 PathProgramCache]: Analyzing trace with hash 2023807437, now seen corresponding path program 83 times [2021-04-15 03:27:44,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:44,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872898437] [2021-04-15 03:27:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:44,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872898437] [2021-04-15 03:27:44,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875585738] [2021-04-15 03:27:44,564 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:44,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-04-15 03:27:44,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:44,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:44,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:44,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:44,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:27:44,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515281543] [2021-04-15 03:27:44,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:27:44,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:44,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:27:44,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:27:44,669 INFO L87 Difference]: Start difference. First operand 59590 states and 131193 transitions. Second operand has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:44,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:44,945 INFO L93 Difference]: Finished difference Result 62315 states and 135765 transitions. [2021-04-15 03:27:44,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:27:44,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:44,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:45,041 INFO L225 Difference]: With dead ends: 62315 [2021-04-15 03:27:45,041 INFO L226 Difference]: Without dead ends: 62243 [2021-04-15 03:27:45,041 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 313.3ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:45,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62243 states. [2021-04-15 03:27:45,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62243 to 59590. [2021-04-15 03:27:46,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.1996173790464684) internal successors, (131073), 59589 states have internal predecessors, (131073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:46,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 131073 transitions. [2021-04-15 03:27:46,146 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 131073 transitions. Word has length 66 [2021-04-15 03:27:46,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:46,147 INFO L480 AbstractCegarLoop]: Abstraction has 59590 states and 131073 transitions. [2021-04-15 03:27:46,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.6) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:46,147 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 131073 transitions. [2021-04-15 03:27:46,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:46,192 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:46,193 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:46,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:46,393 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:46,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:46,393 INFO L82 PathProgramCache]: Analyzing trace with hash -909128409, now seen corresponding path program 84 times [2021-04-15 03:27:46,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:46,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135554886] [2021-04-15 03:27:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:46,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135554886] [2021-04-15 03:27:46,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90176074] [2021-04-15 03:27:46,438 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:46,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-04-15 03:27:46,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:46,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:46,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:46,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:46,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-04-15 03:27:46,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149571053] [2021-04-15 03:27:46,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:27:46,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:46,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:27:46,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:27:46,551 INFO L87 Difference]: Start difference. First operand 59590 states and 131073 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:46,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:46,843 INFO L93 Difference]: Finished difference Result 62467 states and 135889 transitions. [2021-04-15 03:27:46,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:27:46,844 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:46,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:46,924 INFO L225 Difference]: With dead ends: 62467 [2021-04-15 03:27:46,924 INFO L226 Difference]: Without dead ends: 62335 [2021-04-15 03:27:46,925 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:27:46,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62335 states. [2021-04-15 03:27:47,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62335 to 59590. [2021-04-15 03:27:47,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59590 states, 59589 states have (on average 2.1969323197234387) internal successors, (130913), 59589 states have internal predecessors, (130913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:47,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59590 states to 59590 states and 130913 transitions. [2021-04-15 03:27:47,955 INFO L78 Accepts]: Start accepts. Automaton has 59590 states and 130913 transitions. Word has length 66 [2021-04-15 03:27:47,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:47,955 INFO L480 AbstractCegarLoop]: Abstraction has 59590 states and 130913 transitions. [2021-04-15 03:27:47,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 10 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 59590 states and 130913 transitions. [2021-04-15 03:27:48,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:48,001 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:48,002 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:48,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-04-15 03:27:48,202 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:48,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1791126029, now seen corresponding path program 85 times [2021-04-15 03:27:48,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:48,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110243148] [2021-04-15 03:27:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:48,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110243148] [2021-04-15 03:27:48,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347820022] [2021-04-15 03:27:48,253 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:48,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:48,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:27:48,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:48,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:27:48,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919501544] [2021-04-15 03:27:48,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:27:48,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:48,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:27:48,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:27:48,353 INFO L87 Difference]: Start difference. First operand 59590 states and 130913 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:48,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:48,648 INFO L93 Difference]: Finished difference Result 62011 states and 135009 transitions. [2021-04-15 03:27:48,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:27:48,648 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:48,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:48,735 INFO L225 Difference]: With dead ends: 62011 [2021-04-15 03:27:48,736 INFO L226 Difference]: Without dead ends: 61819 [2021-04-15 03:27:48,736 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:27:48,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61819 states. [2021-04-15 03:27:49,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61819 to 59670. [2021-04-15 03:27:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59670 states, 59669 states have (on average 2.193383498969314) internal successors, (130877), 59669 states have internal predecessors, (130877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:49,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59670 states to 59670 states and 130877 transitions. [2021-04-15 03:27:49,794 INFO L78 Accepts]: Start accepts. Automaton has 59670 states and 130877 transitions. Word has length 66 [2021-04-15 03:27:49,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:49,794 INFO L480 AbstractCegarLoop]: Abstraction has 59670 states and 130877 transitions. [2021-04-15 03:27:49,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:49,794 INFO L276 IsEmpty]: Start isEmpty. Operand 59670 states and 130877 transitions. [2021-04-15 03:27:49,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:49,842 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:49,842 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:50,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:50,042 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:50,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:50,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1714547269, now seen corresponding path program 86 times [2021-04-15 03:27:50,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:50,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250709490] [2021-04-15 03:27:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-04-15 03:27:50,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250709490] [2021-04-15 03:27:50,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779589983] [2021-04-15 03:27:50,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:50,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:27:50,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:50,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:50,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 36 proven. 76 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-04-15 03:27:50,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:50,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-04-15 03:27:50,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847927371] [2021-04-15 03:27:50,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:27:50,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:50,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:27:50,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:27:50,194 INFO L87 Difference]: Start difference. First operand 59670 states and 130877 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:50,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:50,476 INFO L93 Difference]: Finished difference Result 65831 states and 143283 transitions. [2021-04-15 03:27:50,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:27:50,477 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:50,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:50,571 INFO L225 Difference]: With dead ends: 65831 [2021-04-15 03:27:50,571 INFO L226 Difference]: Without dead ends: 65774 [2021-04-15 03:27:50,571 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:27:50,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65774 states. [2021-04-15 03:27:51,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65774 to 55516. [2021-04-15 03:27:51,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55516 states, 55515 states have (on average 2.1908132937044043) internal successors, (121623), 55515 states have internal predecessors, (121623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55516 states to 55516 states and 121623 transitions. [2021-04-15 03:27:51,669 INFO L78 Accepts]: Start accepts. Automaton has 55516 states and 121623 transitions. Word has length 66 [2021-04-15 03:27:51,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:51,669 INFO L480 AbstractCegarLoop]: Abstraction has 55516 states and 121623 transitions. [2021-04-15 03:27:51,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:51,670 INFO L276 IsEmpty]: Start isEmpty. Operand 55516 states and 121623 transitions. [2021-04-15 03:27:51,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:51,713 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:51,713 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:51,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-04-15 03:27:51,914 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:51,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:51,914 INFO L82 PathProgramCache]: Analyzing trace with hash 129559749, now seen corresponding path program 87 times [2021-04-15 03:27:51,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:51,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637676155] [2021-04-15 03:27:51,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-04-15 03:27:51,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637676155] [2021-04-15 03:27:51,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117350750] [2021-04-15 03:27:51,954 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:27:51,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-04-15 03:27:51,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:51,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:51,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 29 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-04-15 03:27:52,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:52,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:27:52,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838152096] [2021-04-15 03:27:52,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:27:52,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:52,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:27:52,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:27:52,070 INFO L87 Difference]: Start difference. First operand 55516 states and 121623 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:52,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:52,343 INFO L93 Difference]: Finished difference Result 61581 states and 133847 transitions. [2021-04-15 03:27:52,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:27:52,343 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:52,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:52,722 INFO L225 Difference]: With dead ends: 61581 [2021-04-15 03:27:52,723 INFO L226 Difference]: Without dead ends: 61554 [2021-04-15 03:27:52,723 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:27:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61554 states. [2021-04-15 03:27:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61554 to 54860. [2021-04-15 03:27:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54860 states, 54859 states have (on average 2.1912721704733955) internal successors, (120211), 54859 states have internal predecessors, (120211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:53,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54860 states to 54860 states and 120211 transitions. [2021-04-15 03:27:53,381 INFO L78 Accepts]: Start accepts. Automaton has 54860 states and 120211 transitions. Word has length 66 [2021-04-15 03:27:53,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:53,381 INFO L480 AbstractCegarLoop]: Abstraction has 54860 states and 120211 transitions. [2021-04-15 03:27:53,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:53,381 INFO L276 IsEmpty]: Start isEmpty. Operand 54860 states and 120211 transitions. [2021-04-15 03:27:53,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:53,418 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:53,418 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:53,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:53,618 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:53,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:53,619 INFO L82 PathProgramCache]: Analyzing trace with hash -518473861, now seen corresponding path program 88 times [2021-04-15 03:27:53,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:53,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643810122] [2021-04-15 03:27:53,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 03:27:53,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643810122] [2021-04-15 03:27:53,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503159499] [2021-04-15 03:27:53,648 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:53,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:27:53,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:53,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:53,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 92 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 03:27:53,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:53,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:27:53,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989138772] [2021-04-15 03:27:53,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:27:53,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:53,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:27:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:27:53,754 INFO L87 Difference]: Start difference. First operand 54860 states and 120211 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:54,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:54,183 INFO L93 Difference]: Finished difference Result 62633 states and 136579 transitions. [2021-04-15 03:27:54,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:27:54,183 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:54,249 INFO L225 Difference]: With dead ends: 62633 [2021-04-15 03:27:54,249 INFO L226 Difference]: Without dead ends: 62630 [2021-04-15 03:27:54,249 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:54,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62630 states. [2021-04-15 03:27:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62630 to 56940. [2021-04-15 03:27:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56940 states, 56939 states have (on average 2.195525035564376) internal successors, (125011), 56939 states have internal predecessors, (125011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:54,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56940 states to 56940 states and 125011 transitions. [2021-04-15 03:27:54,986 INFO L78 Accepts]: Start accepts. Automaton has 56940 states and 125011 transitions. Word has length 66 [2021-04-15 03:27:54,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:54,987 INFO L480 AbstractCegarLoop]: Abstraction has 56940 states and 125011 transitions. [2021-04-15 03:27:54,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:54,987 INFO L276 IsEmpty]: Start isEmpty. Operand 56940 states and 125011 transitions. [2021-04-15 03:27:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:55,026 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:55,026 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:55,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-04-15 03:27:55,227 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:55,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1653142277, now seen corresponding path program 89 times [2021-04-15 03:27:55,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:55,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194201175] [2021-04-15 03:27:55,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:55,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194201175] [2021-04-15 03:27:55,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933120890] [2021-04-15 03:27:55,272 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:55,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-04-15 03:27:55,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:55,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2021-04-15 03:27:55,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:55,511 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-04-15 03:27:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 22 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:55,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:55,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:27:55,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268723697] [2021-04-15 03:27:55,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:27:55,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:55,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:27:55,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:27:55,573 INFO L87 Difference]: Start difference. First operand 56940 states and 125011 transitions. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:55,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:55,814 INFO L93 Difference]: Finished difference Result 66890 states and 145747 transitions. [2021-04-15 03:27:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:27:55,814 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:55,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:55,900 INFO L225 Difference]: With dead ends: 66890 [2021-04-15 03:27:55,900 INFO L226 Difference]: Without dead ends: 66890 [2021-04-15 03:27:55,900 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:27:55,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66890 states. [2021-04-15 03:27:56,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66890 to 62652. [2021-04-15 03:27:56,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62652 states, 62651 states have (on average 2.2049288917974175) internal successors, (138141), 62651 states have internal predecessors, (138141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:56,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62652 states to 62652 states and 138141 transitions. [2021-04-15 03:27:56,914 INFO L78 Accepts]: Start accepts. Automaton has 62652 states and 138141 transitions. Word has length 66 [2021-04-15 03:27:56,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:56,914 INFO L480 AbstractCegarLoop]: Abstraction has 62652 states and 138141 transitions. [2021-04-15 03:27:56,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 8 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:56,915 INFO L276 IsEmpty]: Start isEmpty. Operand 62652 states and 138141 transitions. [2021-04-15 03:27:56,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:56,952 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:56,952 INFO L551 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:57,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-04-15 03:27:57,157 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:57,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:57,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1471769019, now seen corresponding path program 90 times [2021-04-15 03:27:57,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:57,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768674442] [2021-04-15 03:27:57,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:27:57,188 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 45 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:27:57,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768674442] [2021-04-15 03:27:57,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776539273] [2021-04-15 03:27:57,188 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:27:57,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-04-15 03:27:57,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:27:57,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:27:57,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:27:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 27 proven. 74 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-04-15 03:27:57,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:27:57,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-04-15 03:27:57,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262596273] [2021-04-15 03:27:57,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:27:57,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:27:57,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:27:57,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:27:57,337 INFO L87 Difference]: Start difference. First operand 62652 states and 138141 transitions. Second operand has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:58,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:27:58,447 INFO L93 Difference]: Finished difference Result 90468 states and 195554 transitions. [2021-04-15 03:27:58,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-04-15 03:27:58,447 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:27:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:27:58,557 INFO L225 Difference]: With dead ends: 90468 [2021-04-15 03:27:58,557 INFO L226 Difference]: Without dead ends: 90440 [2021-04-15 03:27:58,558 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 542.5ms TimeCoverageRelationStatistics Valid=788, Invalid=4182, Unknown=0, NotChecked=0, Total=4970 [2021-04-15 03:27:58,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90440 states. [2021-04-15 03:27:59,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90440 to 64804. [2021-04-15 03:27:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64804 states, 64803 states have (on average 2.2016727620634846) internal successors, (142675), 64803 states have internal predecessors, (142675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 142675 transitions. [2021-04-15 03:27:59,737 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 142675 transitions. Word has length 66 [2021-04-15 03:27:59,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:27:59,737 INFO L480 AbstractCegarLoop]: Abstraction has 64804 states and 142675 transitions. [2021-04-15 03:27:59,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.9375) internal successors, (111), 15 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:27:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 142675 transitions. [2021-04-15 03:27:59,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:27:59,779 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:27:59,779 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:27:59,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-04-15 03:27:59,979 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:27:59,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:27:59,980 INFO L82 PathProgramCache]: Analyzing trace with hash 47459948, now seen corresponding path program 91 times [2021-04-15 03:27:59,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:27:59,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292484023] [2021-04-15 03:27:59,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:27:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:00,024 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 51 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:00,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292484023] [2021-04-15 03:28:00,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99136557] [2021-04-15 03:28:00,025 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:28:00,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:00,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:28:00,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 44 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-04-15 03:28:00,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:00,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-04-15 03:28:00,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601889879] [2021-04-15 03:28:00,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:28:00,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:00,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:28:00,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:28:00,301 INFO L87 Difference]: Start difference. First operand 64804 states and 142675 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:00,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:00,564 INFO L93 Difference]: Finished difference Result 71842 states and 157251 transitions. [2021-04-15 03:28:00,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:28:00,565 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:28:00,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:00,649 INFO L225 Difference]: With dead ends: 71842 [2021-04-15 03:28:00,649 INFO L226 Difference]: Without dead ends: 71794 [2021-04-15 03:28:00,650 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:28:00,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71794 states. [2021-04-15 03:28:01,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71794 to 64804. [2021-04-15 03:28:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64804 states, 64803 states have (on average 2.2010555066895052) internal successors, (142635), 64803 states have internal predecessors, (142635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64804 states to 64804 states and 142635 transitions. [2021-04-15 03:28:01,751 INFO L78 Accepts]: Start accepts. Automaton has 64804 states and 142635 transitions. Word has length 66 [2021-04-15 03:28:01,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:01,751 INFO L480 AbstractCegarLoop]: Abstraction has 64804 states and 142635 transitions. [2021-04-15 03:28:01,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 64804 states and 142635 transitions. [2021-04-15 03:28:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:28:01,793 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:01,793 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:01,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:01,994 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:01,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:01,995 INFO L82 PathProgramCache]: Analyzing trace with hash -442650298, now seen corresponding path program 92 times [2021-04-15 03:28:01,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:01,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475666423] [2021-04-15 03:28:01,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 52 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:02,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475666423] [2021-04-15 03:28:02,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854063952] [2021-04-15 03:28:02,047 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:02,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:28:02,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:02,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:28:02,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 64 proven. 52 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-04-15 03:28:02,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:02,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-04-15 03:28:02,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632111102] [2021-04-15 03:28:02,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:28:02,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:02,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:28:02,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:28:02,142 INFO L87 Difference]: Start difference. First operand 64804 states and 142635 transitions. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:02,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:02,404 INFO L93 Difference]: Finished difference Result 72032 states and 157512 transitions. [2021-04-15 03:28:02,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:28:02,405 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:28:02,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:02,493 INFO L225 Difference]: With dead ends: 72032 [2021-04-15 03:28:02,493 INFO L226 Difference]: Without dead ends: 71944 [2021-04-15 03:28:02,493 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:02,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71944 states. [2021-04-15 03:28:03,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71944 to 66864. [2021-04-15 03:28:03,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66864 states, 66863 states have (on average 2.2050910069844307) internal successors, (147439), 66863 states have internal predecessors, (147439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66864 states to 66864 states and 147439 transitions. [2021-04-15 03:28:03,638 INFO L78 Accepts]: Start accepts. Automaton has 66864 states and 147439 transitions. Word has length 66 [2021-04-15 03:28:03,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:03,638 INFO L480 AbstractCegarLoop]: Abstraction has 66864 states and 147439 transitions. [2021-04-15 03:28:03,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:03,638 INFO L276 IsEmpty]: Start isEmpty. Operand 66864 states and 147439 transitions. [2021-04-15 03:28:03,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-04-15 03:28:03,677 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:03,677 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:03,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-04-15 03:28:03,879 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:03,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:03,879 INFO L82 PathProgramCache]: Analyzing trace with hash 361914028, now seen corresponding path program 93 times [2021-04-15 03:28:03,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:03,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299388298] [2021-04-15 03:28:03,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 62 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:03,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299388298] [2021-04-15 03:28:03,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754946585] [2021-04-15 03:28:03,939 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:03,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-04-15 03:28:03,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:03,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:28:03,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:04,111 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-04-15 03:28:04,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:04,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-04-15 03:28:04,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224626982] [2021-04-15 03:28:04,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-04-15 03:28:04,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:04,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-04-15 03:28:04,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:28:04,112 INFO L87 Difference]: Start difference. First operand 66864 states and 147439 transitions. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:05,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:05,991 INFO L93 Difference]: Finished difference Result 139029 states and 299640 transitions. [2021-04-15 03:28:05,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-04-15 03:28:05,993 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-04-15 03:28:05,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:06,185 INFO L225 Difference]: With dead ends: 139029 [2021-04-15 03:28:06,185 INFO L226 Difference]: Without dead ends: 138261 [2021-04-15 03:28:06,186 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3539 ImplicationChecksByTransitivity, 877.9ms TimeCoverageRelationStatistics Valid=961, Invalid=9139, Unknown=0, NotChecked=0, Total=10100 [2021-04-15 03:28:06,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138261 states. [2021-04-15 03:28:07,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138261 to 102720. [2021-04-15 03:28:07,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102720 states, 102719 states have (on average 2.1767637924824035) internal successors, (223595), 102719 states have internal predecessors, (223595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:08,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102720 states to 102720 states and 223595 transitions. [2021-04-15 03:28:08,151 INFO L78 Accepts]: Start accepts. Automaton has 102720 states and 223595 transitions. Word has length 66 [2021-04-15 03:28:08,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:08,151 INFO L480 AbstractCegarLoop]: Abstraction has 102720 states and 223595 transitions. [2021-04-15 03:28:08,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 21 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:08,151 INFO L276 IsEmpty]: Start isEmpty. Operand 102720 states and 223595 transitions. [2021-04-15 03:28:08,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:28:08,230 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:08,230 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:08,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:08,431 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:08,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:08,431 INFO L82 PathProgramCache]: Analyzing trace with hash -2025977669, now seen corresponding path program 94 times [2021-04-15 03:28:08,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:08,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517055550] [2021-04-15 03:28:08,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:08,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517055550] [2021-04-15 03:28:08,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781047513] [2021-04-15 03:28:08,516 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:08,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:28:08,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:08,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:28:08,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 100 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:08,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:08,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-04-15 03:28:08,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354898117] [2021-04-15 03:28:08,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:28:08,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:08,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:28:08,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:28:08,634 INFO L87 Difference]: Start difference. First operand 102720 states and 223595 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:09,161 INFO L93 Difference]: Finished difference Result 133769 states and 293050 transitions. [2021-04-15 03:28:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:28:09,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:28:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:09,335 INFO L225 Difference]: With dead ends: 133769 [2021-04-15 03:28:09,335 INFO L226 Difference]: Without dead ends: 133551 [2021-04-15 03:28:09,335 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2021-04-15 03:28:09,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133551 states. [2021-04-15 03:28:11,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133551 to 130358. [2021-04-15 03:28:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130358 states, 130357 states have (on average 2.1991991224099974) internal successors, (286681), 130357 states have internal predecessors, (286681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130358 states to 130358 states and 286681 transitions. [2021-04-15 03:28:11,905 INFO L78 Accepts]: Start accepts. Automaton has 130358 states and 286681 transitions. Word has length 76 [2021-04-15 03:28:11,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:11,905 INFO L480 AbstractCegarLoop]: Abstraction has 130358 states and 286681 transitions. [2021-04-15 03:28:11,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:11,906 INFO L276 IsEmpty]: Start isEmpty. Operand 130358 states and 286681 transitions. [2021-04-15 03:28:11,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:28:11,990 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:11,990 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:12,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-04-15 03:28:12,192 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:12,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:12,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1940313489, now seen corresponding path program 95 times [2021-04-15 03:28:12,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:12,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593249201] [2021-04-15 03:28:12,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:12,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593249201] [2021-04-15 03:28:12,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926895832] [2021-04-15 03:28:12,239 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:12,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 03:28:12,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:12,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:28:12,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:12,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:12,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:28:12,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681010441] [2021-04-15 03:28:12,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:28:12,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:12,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:28:12,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:28:12,362 INFO L87 Difference]: Start difference. First operand 130358 states and 286681 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:13,113 INFO L93 Difference]: Finished difference Result 133389 states and 291682 transitions. [2021-04-15 03:28:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:28:13,113 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:28:13,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:13,271 INFO L225 Difference]: With dead ends: 133389 [2021-04-15 03:28:13,272 INFO L226 Difference]: Without dead ends: 133389 [2021-04-15 03:28:13,272 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:28:13,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133389 states. [2021-04-15 03:28:15,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133389 to 125674. [2021-04-15 03:28:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125674 states, 125673 states have (on average 2.193892085014283) internal successors, (275713), 125673 states have internal predecessors, (275713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:15,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125674 states to 125674 states and 275713 transitions. [2021-04-15 03:28:15,624 INFO L78 Accepts]: Start accepts. Automaton has 125674 states and 275713 transitions. Word has length 76 [2021-04-15 03:28:15,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:15,624 INFO L480 AbstractCegarLoop]: Abstraction has 125674 states and 275713 transitions. [2021-04-15 03:28:15,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:15,624 INFO L276 IsEmpty]: Start isEmpty. Operand 125674 states and 275713 transitions. [2021-04-15 03:28:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:28:15,705 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:15,705 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:15,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:15,906 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:15,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:15,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1246228997, now seen corresponding path program 96 times [2021-04-15 03:28:15,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:15,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732790766] [2021-04-15 03:28:15,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:15,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732790766] [2021-04-15 03:28:15,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074480743] [2021-04-15 03:28:15,942 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:15,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:28:15,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:15,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:28:15,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 104 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:16,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:16,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:28:16,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578524461] [2021-04-15 03:28:16,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:28:16,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:16,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:28:16,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:28:16,059 INFO L87 Difference]: Start difference. First operand 125674 states and 275713 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:16,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:16,486 INFO L93 Difference]: Finished difference Result 131872 states and 288047 transitions. [2021-04-15 03:28:16,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:28:16,487 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:28:16,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:16,677 INFO L225 Difference]: With dead ends: 131872 [2021-04-15 03:28:16,677 INFO L226 Difference]: Without dead ends: 131866 [2021-04-15 03:28:16,678 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:28:16,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131866 states. [2021-04-15 03:28:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131866 to 128726. [2021-04-15 03:28:18,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128726 states, 128725 states have (on average 2.197374247426685) internal successors, (282857), 128725 states have internal predecessors, (282857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:18,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128726 states to 128726 states and 282857 transitions. [2021-04-15 03:28:18,846 INFO L78 Accepts]: Start accepts. Automaton has 128726 states and 282857 transitions. Word has length 76 [2021-04-15 03:28:18,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:18,846 INFO L480 AbstractCegarLoop]: Abstraction has 128726 states and 282857 transitions. [2021-04-15 03:28:18,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:18,846 INFO L276 IsEmpty]: Start isEmpty. Operand 128726 states and 282857 transitions. [2021-04-15 03:28:18,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:28:18,927 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:18,927 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:19,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:19,127 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:19,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:19,127 INFO L82 PathProgramCache]: Analyzing trace with hash -941503377, now seen corresponding path program 97 times [2021-04-15 03:28:19,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:19,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027981497] [2021-04-15 03:28:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 83 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:19,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027981497] [2021-04-15 03:28:19,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032131260] [2021-04-15 03:28:19,169 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:19,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:28:19,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 83 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:19,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:19,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:28:19,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064624293] [2021-04-15 03:28:19,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:28:19,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:19,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:28:19,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:28:19,285 INFO L87 Difference]: Start difference. First operand 128726 states and 282857 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:19,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:19,708 INFO L93 Difference]: Finished difference Result 134932 states and 294145 transitions. [2021-04-15 03:28:19,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:28:19,708 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:28:19,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:20,317 INFO L225 Difference]: With dead ends: 134932 [2021-04-15 03:28:20,318 INFO L226 Difference]: Without dead ends: 134930 [2021-04-15 03:28:20,318 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:28:20,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134930 states. [2021-04-15 03:28:21,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134930 to 128702. [2021-04-15 03:28:22,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128702 states, 128701 states have (on average 2.1954841065725983) internal successors, (282561), 128701 states have internal predecessors, (282561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:22,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128702 states to 128702 states and 282561 transitions. [2021-04-15 03:28:22,284 INFO L78 Accepts]: Start accepts. Automaton has 128702 states and 282561 transitions. Word has length 76 [2021-04-15 03:28:22,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:22,284 INFO L480 AbstractCegarLoop]: Abstraction has 128702 states and 282561 transitions. [2021-04-15 03:28:22,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:22,284 INFO L276 IsEmpty]: Start isEmpty. Operand 128702 states and 282561 transitions. [2021-04-15 03:28:22,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:28:22,677 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:22,677 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:22,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-04-15 03:28:22,892 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:22,892 INFO L82 PathProgramCache]: Analyzing trace with hash -551299451, now seen corresponding path program 98 times [2021-04-15 03:28:22,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:22,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37842591] [2021-04-15 03:28:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:22,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37842591] [2021-04-15 03:28:22,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705428839] [2021-04-15 03:28:22,940 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:22,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:28:22,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:22,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:28:22,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:23,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:23,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-04-15 03:28:23,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941115112] [2021-04-15 03:28:23,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:28:23,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:23,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:28:23,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:28:23,063 INFO L87 Difference]: Start difference. First operand 128702 states and 282561 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:23,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:23,492 INFO L93 Difference]: Finished difference Result 134144 states and 292817 transitions. [2021-04-15 03:28:23,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:28:23,492 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:28:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:23,669 INFO L225 Difference]: With dead ends: 134144 [2021-04-15 03:28:23,669 INFO L226 Difference]: Without dead ends: 134142 [2021-04-15 03:28:23,669 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:28:23,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134142 states. [2021-04-15 03:28:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134142 to 128026. [2021-04-15 03:28:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128026 states, 128025 states have (on average 2.1946260495996874) internal successors, (280967), 128025 states have internal predecessors, (280967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:26,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128026 states to 128026 states and 280967 transitions. [2021-04-15 03:28:26,008 INFO L78 Accepts]: Start accepts. Automaton has 128026 states and 280967 transitions. Word has length 76 [2021-04-15 03:28:26,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:26,008 INFO L480 AbstractCegarLoop]: Abstraction has 128026 states and 280967 transitions. [2021-04-15 03:28:26,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:26,008 INFO L276 IsEmpty]: Start isEmpty. Operand 128026 states and 280967 transitions. [2021-04-15 03:28:26,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:28:26,100 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:26,100 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:26,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:26,301 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:26,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1583115929, now seen corresponding path program 99 times [2021-04-15 03:28:26,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:26,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676970800] [2021-04-15 03:28:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:28:26,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676970800] [2021-04-15 03:28:26,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143288038] [2021-04-15 03:28:26,339 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:26,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-04-15 03:28:26,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:26,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:28:26,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 97 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:28:26,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:26,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:28:26,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567785771] [2021-04-15 03:28:26,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:28:26,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:26,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:28:26,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:28:26,456 INFO L87 Difference]: Start difference. First operand 128026 states and 280967 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:26,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:26,925 INFO L93 Difference]: Finished difference Result 134843 states and 294803 transitions. [2021-04-15 03:28:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:28:26,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:28:26,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:27,112 INFO L225 Difference]: With dead ends: 134843 [2021-04-15 03:28:27,112 INFO L226 Difference]: Without dead ends: 134807 [2021-04-15 03:28:27,112 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:28:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134807 states. [2021-04-15 03:28:28,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134807 to 131862. [2021-04-15 03:28:29,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131862 states, 131861 states have (on average 2.1977916138964515) internal successors, (289803), 131861 states have internal predecessors, (289803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:29,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131862 states to 131862 states and 289803 transitions. [2021-04-15 03:28:29,330 INFO L78 Accepts]: Start accepts. Automaton has 131862 states and 289803 transitions. Word has length 76 [2021-04-15 03:28:29,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:29,331 INFO L480 AbstractCegarLoop]: Abstraction has 131862 states and 289803 transitions. [2021-04-15 03:28:29,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:29,331 INFO L276 IsEmpty]: Start isEmpty. Operand 131862 states and 289803 transitions. [2021-04-15 03:28:29,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:28:29,411 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:29,411 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:29,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:29,612 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:29,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:29,612 INFO L82 PathProgramCache]: Analyzing trace with hash 128207611, now seen corresponding path program 100 times [2021-04-15 03:28:29,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:29,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655250365] [2021-04-15 03:28:29,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:29,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655250365] [2021-04-15 03:28:29,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669742194] [2021-04-15 03:28:29,649 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:29,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:28:29,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:29,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:28:29,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 123 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:29,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:29,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:28:29,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474013746] [2021-04-15 03:28:29,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:28:29,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:29,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:28:29,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:28:29,769 INFO L87 Difference]: Start difference. First operand 131862 states and 289803 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:30,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:30,580 INFO L93 Difference]: Finished difference Result 138462 states and 302796 transitions. [2021-04-15 03:28:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:28:30,580 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:28:30,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:30,761 INFO L225 Difference]: With dead ends: 138462 [2021-04-15 03:28:30,761 INFO L226 Difference]: Without dead ends: 138426 [2021-04-15 03:28:30,761 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:28:30,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138426 states. [2021-04-15 03:28:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138426 to 131338. [2021-04-15 03:28:32,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131338 states, 131337 states have (on average 2.1961747260863276) internal successors, (288439), 131337 states have internal predecessors, (288439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:33,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131338 states to 131338 states and 288439 transitions. [2021-04-15 03:28:33,083 INFO L78 Accepts]: Start accepts. Automaton has 131338 states and 288439 transitions. Word has length 76 [2021-04-15 03:28:33,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:33,083 INFO L480 AbstractCegarLoop]: Abstraction has 131338 states and 288439 transitions. [2021-04-15 03:28:33,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:33,083 INFO L276 IsEmpty]: Start isEmpty. Operand 131338 states and 288439 transitions. [2021-04-15 03:28:33,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:28:33,171 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:33,171 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:33,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-04-15 03:28:33,373 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:33,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:33,373 INFO L82 PathProgramCache]: Analyzing trace with hash 432933231, now seen corresponding path program 101 times [2021-04-15 03:28:33,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:33,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414698368] [2021-04-15 03:28:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:33,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414698368] [2021-04-15 03:28:33,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694793611] [2021-04-15 03:28:33,415 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:33,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 03:28:33,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:33,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:28:33,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:33,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:33,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:28:33,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518503218] [2021-04-15 03:28:33,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:28:33,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:33,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:28:33,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:28:33,547 INFO L87 Difference]: Start difference. First operand 131338 states and 288439 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:33,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:33,998 INFO L93 Difference]: Finished difference Result 140394 states and 305750 transitions. [2021-04-15 03:28:33,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:28:33,998 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:28:33,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:34,195 INFO L225 Difference]: With dead ends: 140394 [2021-04-15 03:28:34,195 INFO L226 Difference]: Without dead ends: 140392 [2021-04-15 03:28:34,196 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:28:34,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140392 states. [2021-04-15 03:28:36,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140392 to 131550. [2021-04-15 03:28:36,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131550 states, 131549 states have (on average 2.1950679974762255) internal successors, (288759), 131549 states have internal predecessors, (288759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:36,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131550 states to 131550 states and 288759 transitions. [2021-04-15 03:28:36,516 INFO L78 Accepts]: Start accepts. Automaton has 131550 states and 288759 transitions. Word has length 76 [2021-04-15 03:28:36,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:36,516 INFO L480 AbstractCegarLoop]: Abstraction has 131550 states and 288759 transitions. [2021-04-15 03:28:36,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:36,516 INFO L276 IsEmpty]: Start isEmpty. Operand 131550 states and 288759 transitions. [2021-04-15 03:28:36,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:28:36,597 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:36,597 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:36,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-04-15 03:28:36,798 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:36,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:36,798 INFO L82 PathProgramCache]: Analyzing trace with hash 823137157, now seen corresponding path program 102 times [2021-04-15 03:28:36,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:36,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208465690] [2021-04-15 03:28:36,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:36,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208465690] [2021-04-15 03:28:36,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317326965] [2021-04-15 03:28:36,841 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:36,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-04-15 03:28:36,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:36,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:28:36,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:36,961 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:36,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:36,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-04-15 03:28:36,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927854660] [2021-04-15 03:28:36,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:28:36,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:36,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:28:36,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:28:36,962 INFO L87 Difference]: Start difference. First operand 131550 states and 288759 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:37,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:37,802 INFO L93 Difference]: Finished difference Result 148818 states and 323300 transitions. [2021-04-15 03:28:37,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:28:37,803 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:28:37,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:38,004 INFO L225 Difference]: With dead ends: 148818 [2021-04-15 03:28:38,004 INFO L226 Difference]: Without dead ends: 148800 [2021-04-15 03:28:38,006 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:28:38,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148800 states. [2021-04-15 03:28:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148800 to 131506. [2021-04-15 03:28:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131506 states, 131505 states have (on average 2.19297365119197) internal successors, (288387), 131505 states have internal predecessors, (288387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131506 states to 131506 states and 288387 transitions. [2021-04-15 03:28:40,421 INFO L78 Accepts]: Start accepts. Automaton has 131506 states and 288387 transitions. Word has length 76 [2021-04-15 03:28:40,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:40,421 INFO L480 AbstractCegarLoop]: Abstraction has 131506 states and 288387 transitions. [2021-04-15 03:28:40,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 131506 states and 288387 transitions. [2021-04-15 03:28:40,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:28:40,506 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:40,506 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:40,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-04-15 03:28:40,707 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:40,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:40,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2018965209, now seen corresponding path program 103 times [2021-04-15 03:28:40,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:40,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505964654] [2021-04-15 03:28:40,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:40,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505964654] [2021-04-15 03:28:40,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801794492] [2021-04-15 03:28:40,755 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:40,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:28:40,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:28:40,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:40,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:28:40,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800187276] [2021-04-15 03:28:40,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:28:40,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:40,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:28:40,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:28:40,872 INFO L87 Difference]: Start difference. First operand 131506 states and 288387 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:41,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:41,350 INFO L93 Difference]: Finished difference Result 138086 states and 301358 transitions. [2021-04-15 03:28:41,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:28:41,350 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:28:41,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:41,536 INFO L225 Difference]: With dead ends: 138086 [2021-04-15 03:28:41,536 INFO L226 Difference]: Without dead ends: 138068 [2021-04-15 03:28:41,536 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138068 states. [2021-04-15 03:28:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138068 to 129102. [2021-04-15 03:28:43,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129102 states, 129101 states have (on average 2.1923222902998427) internal successors, (283031), 129101 states have internal predecessors, (283031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:43,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129102 states to 129102 states and 283031 transitions. [2021-04-15 03:28:43,993 INFO L78 Accepts]: Start accepts. Automaton has 129102 states and 283031 transitions. Word has length 76 [2021-04-15 03:28:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:43,994 INFO L480 AbstractCegarLoop]: Abstraction has 129102 states and 283031 transitions. [2021-04-15 03:28:43,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:43,994 INFO L276 IsEmpty]: Start isEmpty. Operand 129102 states and 283031 transitions. [2021-04-15 03:28:44,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:28:44,082 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:44,083 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:44,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:44,283 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:44,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:44,283 INFO L82 PathProgramCache]: Analyzing trace with hash 974502341, now seen corresponding path program 104 times [2021-04-15 03:28:44,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:44,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674570684] [2021-04-15 03:28:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:28:44,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674570684] [2021-04-15 03:28:44,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194096270] [2021-04-15 03:28:44,323 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:44,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:28:44,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:44,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:28:44,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 108 proven. 59 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:28:44,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:44,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:28:44,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956171087] [2021-04-15 03:28:44,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:28:44,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:44,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:28:44,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:28:44,829 INFO L87 Difference]: Start difference. First operand 129102 states and 283031 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:45,261 INFO L93 Difference]: Finished difference Result 135547 states and 296050 transitions. [2021-04-15 03:28:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:28:45,261 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:28:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:45,436 INFO L225 Difference]: With dead ends: 135547 [2021-04-15 03:28:45,437 INFO L226 Difference]: Without dead ends: 135511 [2021-04-15 03:28:45,437 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:28:45,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135511 states. [2021-04-15 03:28:47,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135511 to 132734. [2021-04-15 03:28:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132734 states, 132733 states have (on average 2.194322436771564) internal successors, (291259), 132733 states have internal predecessors, (291259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132734 states to 132734 states and 291259 transitions. [2021-04-15 03:28:47,778 INFO L78 Accepts]: Start accepts. Automaton has 132734 states and 291259 transitions. Word has length 76 [2021-04-15 03:28:47,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:47,778 INFO L480 AbstractCegarLoop]: Abstraction has 132734 states and 291259 transitions. [2021-04-15 03:28:47,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:47,779 INFO L276 IsEmpty]: Start isEmpty. Operand 132734 states and 291259 transitions. [2021-04-15 03:28:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:28:47,879 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:47,879 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:48,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-04-15 03:28:48,080 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:48,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:48,080 INFO L82 PathProgramCache]: Analyzing trace with hash -14993925, now seen corresponding path program 105 times [2021-04-15 03:28:48,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:48,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804308074] [2021-04-15 03:28:48,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:48,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:48,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804308074] [2021-04-15 03:28:48,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519891007] [2021-04-15 03:28:48,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:48,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 03:28:48,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:48,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:28:48,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 134 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:48,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:48,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:28:48,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761267191] [2021-04-15 03:28:48,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:28:48,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:48,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:28:48,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:28:48,232 INFO L87 Difference]: Start difference. First operand 132734 states and 291259 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:48,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:48,701 INFO L93 Difference]: Finished difference Result 139258 states and 304121 transitions. [2021-04-15 03:28:48,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:28:48,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:28:48,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:48,889 INFO L225 Difference]: With dead ends: 139258 [2021-04-15 03:28:48,889 INFO L226 Difference]: Without dead ends: 139216 [2021-04-15 03:28:48,890 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:28:49,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139216 states. [2021-04-15 03:28:50,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139216 to 132450. [2021-04-15 03:28:51,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132450 states, 132449 states have (on average 2.193168691345348) internal successors, (290483), 132449 states have internal predecessors, (290483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132450 states to 132450 states and 290483 transitions. [2021-04-15 03:28:51,302 INFO L78 Accepts]: Start accepts. Automaton has 132450 states and 290483 transitions. Word has length 76 [2021-04-15 03:28:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:51,302 INFO L480 AbstractCegarLoop]: Abstraction has 132450 states and 290483 transitions. [2021-04-15 03:28:51,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 132450 states and 290483 transitions. [2021-04-15 03:28:51,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:28:51,396 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:51,396 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:51,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-04-15 03:28:51,597 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:51,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:51,597 INFO L82 PathProgramCache]: Analyzing trace with hash 289731695, now seen corresponding path program 106 times [2021-04-15 03:28:51,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:51,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091684595] [2021-04-15 03:28:51,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:51,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091684595] [2021-04-15 03:28:51,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14757318] [2021-04-15 03:28:51,637 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:51,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:28:51,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:51,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:28:51,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:51,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:51,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:28:51,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491957132] [2021-04-15 03:28:51,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:28:51,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:51,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:28:51,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:28:51,757 INFO L87 Difference]: Start difference. First operand 132450 states and 290483 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:52,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:52,561 INFO L93 Difference]: Finished difference Result 142694 states and 310513 transitions. [2021-04-15 03:28:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:28:52,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:28:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:52,782 INFO L225 Difference]: With dead ends: 142694 [2021-04-15 03:28:52,783 INFO L226 Difference]: Without dead ends: 142692 [2021-04-15 03:28:52,783 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:28:52,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142692 states. [2021-04-15 03:28:54,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142692 to 132698. [2021-04-15 03:28:55,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132698 states, 132697 states have (on average 2.1928076746271583) internal successors, (290979), 132697 states have internal predecessors, (290979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:55,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132698 states to 132698 states and 290979 transitions. [2021-04-15 03:28:55,351 INFO L78 Accepts]: Start accepts. Automaton has 132698 states and 290979 transitions. Word has length 76 [2021-04-15 03:28:55,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:55,351 INFO L480 AbstractCegarLoop]: Abstraction has 132698 states and 290979 transitions. [2021-04-15 03:28:55,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:55,351 INFO L276 IsEmpty]: Start isEmpty. Operand 132698 states and 290979 transitions. [2021-04-15 03:28:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:28:55,447 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:55,447 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:55,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-04-15 03:28:55,647 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:55,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:55,648 INFO L82 PathProgramCache]: Analyzing trace with hash 679935621, now seen corresponding path program 107 times [2021-04-15 03:28:55,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:55,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618830334] [2021-04-15 03:28:55,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:55,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618830334] [2021-04-15 03:28:55,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788648343] [2021-04-15 03:28:55,694 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:55,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-04-15 03:28:55,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:55,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:28:55,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:55,816 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 111 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:55,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:55,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-04-15 03:28:55,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499180912] [2021-04-15 03:28:55,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:28:55,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:55,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:28:55,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:28:55,817 INFO L87 Difference]: Start difference. First operand 132698 states and 290979 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:28:56,300 INFO L93 Difference]: Finished difference Result 159426 states and 345883 transitions. [2021-04-15 03:28:56,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:28:56,301 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:28:56,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:28:56,495 INFO L225 Difference]: With dead ends: 159426 [2021-04-15 03:28:56,495 INFO L226 Difference]: Without dead ends: 159408 [2021-04-15 03:28:56,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:28:56,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159408 states. [2021-04-15 03:28:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159408 to 133538. [2021-04-15 03:28:58,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133538 states, 133537 states have (on average 2.1909957539857867) internal successors, (292579), 133537 states have internal predecessors, (292579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:58,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133538 states to 133538 states and 292579 transitions. [2021-04-15 03:28:58,969 INFO L78 Accepts]: Start accepts. Automaton has 133538 states and 292579 transitions. Word has length 76 [2021-04-15 03:28:58,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:28:58,969 INFO L480 AbstractCegarLoop]: Abstraction has 133538 states and 292579 transitions. [2021-04-15 03:28:58,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:28:58,969 INFO L276 IsEmpty]: Start isEmpty. Operand 133538 states and 292579 transitions. [2021-04-15 03:28:59,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:28:59,057 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:28:59,057 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:28:59,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:59,258 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:28:59,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:28:59,258 INFO L82 PathProgramCache]: Analyzing trace with hash 2132800551, now seen corresponding path program 108 times [2021-04-15 03:28:59,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:28:59,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101581078] [2021-04-15 03:28:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:28:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:28:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:59,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101581078] [2021-04-15 03:28:59,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122425385] [2021-04-15 03:28:59,306 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:28:59,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-04-15 03:28:59,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:28:59,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:28:59,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:28:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 95 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:28:59,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:28:59,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:28:59,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130645288] [2021-04-15 03:28:59,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:28:59,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:28:59,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:28:59,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:28:59,432 INFO L87 Difference]: Start difference. First operand 133538 states and 292579 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:00,363 INFO L93 Difference]: Finished difference Result 154174 states and 334665 transitions. [2021-04-15 03:29:00,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:29:00,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:29:00,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:00,572 INFO L225 Difference]: With dead ends: 154174 [2021-04-15 03:29:00,573 INFO L226 Difference]: Without dead ends: 154136 [2021-04-15 03:29:00,573 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 466.7ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:00,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154136 states. [2021-04-15 03:29:02,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154136 to 133478. [2021-04-15 03:29:02,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133478 states, 133477 states have (on average 2.1892535792683385) internal successors, (292215), 133477 states have internal predecessors, (292215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133478 states to 133478 states and 292215 transitions. [2021-04-15 03:29:03,038 INFO L78 Accepts]: Start accepts. Automaton has 133478 states and 292215 transitions. Word has length 76 [2021-04-15 03:29:03,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:03,038 INFO L480 AbstractCegarLoop]: Abstraction has 133478 states and 292215 transitions. [2021-04-15 03:29:03,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 133478 states and 292215 transitions. [2021-04-15 03:29:03,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:29:03,130 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:03,130 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:03,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:03,331 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:03,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:03,331 INFO L82 PathProgramCache]: Analyzing trace with hash 271329285, now seen corresponding path program 109 times [2021-04-15 03:29:03,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:03,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875455767] [2021-04-15 03:29:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:03,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875455767] [2021-04-15 03:29:03,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140444200] [2021-04-15 03:29:03,387 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:03,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:29:03,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:03,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:03,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-04-15 03:29:03,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236168303] [2021-04-15 03:29:03,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:29:03,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:03,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:29:03,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:29:03,506 INFO L87 Difference]: Start difference. First operand 133478 states and 292215 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:04,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:04,052 INFO L93 Difference]: Finished difference Result 139982 states and 305517 transitions. [2021-04-15 03:29:04,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:29:04,052 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:29:04,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:04,261 INFO L225 Difference]: With dead ends: 139982 [2021-04-15 03:29:04,261 INFO L226 Difference]: Without dead ends: 139944 [2021-04-15 03:29:04,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139944 states. [2021-04-15 03:29:06,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139944 to 129634. [2021-04-15 03:29:06,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129634 states, 129633 states have (on average 2.1887250931475783) internal successors, (283731), 129633 states have internal predecessors, (283731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:06,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129634 states to 129634 states and 283731 transitions. [2021-04-15 03:29:06,653 INFO L78 Accepts]: Start accepts. Automaton has 129634 states and 283731 transitions. Word has length 76 [2021-04-15 03:29:06,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:06,653 INFO L480 AbstractCegarLoop]: Abstraction has 129634 states and 283731 transitions. [2021-04-15 03:29:06,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:06,653 INFO L276 IsEmpty]: Start isEmpty. Operand 129634 states and 283731 transitions. [2021-04-15 03:29:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:29:06,737 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:06,737 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:06,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:06,937 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:06,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:06,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1903347815, now seen corresponding path program 110 times [2021-04-15 03:29:06,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:06,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987458272] [2021-04-15 03:29:06,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:29:06,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987458272] [2021-04-15 03:29:06,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673253900] [2021-04-15 03:29:06,982 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:07,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:29:07,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:07,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:29:07,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 109 proven. 58 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:29:07,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:07,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:29:07,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857855967] [2021-04-15 03:29:07,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:29:07,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:07,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:29:07,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:29:07,094 INFO L87 Difference]: Start difference. First operand 129634 states and 283731 transitions. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:08,100 INFO L93 Difference]: Finished difference Result 135321 states and 295193 transitions. [2021-04-15 03:29:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:29:08,100 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:29:08,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:08,304 INFO L225 Difference]: With dead ends: 135321 [2021-04-15 03:29:08,304 INFO L226 Difference]: Without dead ends: 135249 [2021-04-15 03:29:08,304 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:29:08,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135249 states. [2021-04-15 03:29:09,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135249 to 123270. [2021-04-15 03:29:09,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123270 states, 123269 states have (on average 2.185910488443972) internal successors, (269455), 123269 states have internal predecessors, (269455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:10,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123270 states to 123270 states and 269455 transitions. [2021-04-15 03:29:10,081 INFO L78 Accepts]: Start accepts. Automaton has 123270 states and 269455 transitions. Word has length 76 [2021-04-15 03:29:10,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:10,081 INFO L480 AbstractCegarLoop]: Abstraction has 123270 states and 269455 transitions. [2021-04-15 03:29:10,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 9 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 123270 states and 269455 transitions. [2021-04-15 03:29:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:29:10,165 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:10,165 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:10,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-04-15 03:29:10,366 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:10,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:10,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1486828283, now seen corresponding path program 111 times [2021-04-15 03:29:10,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:10,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845107775] [2021-04-15 03:29:10,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:10,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:29:10,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845107775] [2021-04-15 03:29:10,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408537546] [2021-04-15 03:29:10,403 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:10,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-04-15 03:29:10,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:10,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:29:10,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 135 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:29:10,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:10,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:29:10,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186925607] [2021-04-15 03:29:10,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:29:10,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:10,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:29:10,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:29:10,519 INFO L87 Difference]: Start difference. First operand 123270 states and 269455 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:11,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:11,312 INFO L93 Difference]: Finished difference Result 128955 states and 280766 transitions. [2021-04-15 03:29:11,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:29:11,312 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:29:11,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:11,482 INFO L225 Difference]: With dead ends: 128955 [2021-04-15 03:29:11,483 INFO L226 Difference]: Without dead ends: 128913 [2021-04-15 03:29:11,483 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:29:11,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128913 states. [2021-04-15 03:29:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128913 to 122990. [2021-04-15 03:29:13,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122990 states, 122989 states have (on average 2.185553179552643) internal successors, (268799), 122989 states have internal predecessors, (268799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:13,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122990 states to 122990 states and 268799 transitions. [2021-04-15 03:29:13,657 INFO L78 Accepts]: Start accepts. Automaton has 122990 states and 268799 transitions. Word has length 76 [2021-04-15 03:29:13,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:13,657 INFO L480 AbstractCegarLoop]: Abstraction has 122990 states and 268799 transitions. [2021-04-15 03:29:13,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:13,657 INFO L276 IsEmpty]: Start isEmpty. Operand 122990 states and 268799 transitions. [2021-04-15 03:29:13,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:29:13,726 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:13,726 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:13,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-04-15 03:29:13,937 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:13,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1791553903, now seen corresponding path program 112 times [2021-04-15 03:29:13,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:13,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69722529] [2021-04-15 03:29:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 114 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:29:13,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69722529] [2021-04-15 03:29:13,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849669140] [2021-04-15 03:29:13,972 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:13,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:29:13,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:13,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:29:13,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 114 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:29:14,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:14,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:29:14,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059977389] [2021-04-15 03:29:14,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:29:14,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:14,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:29:14,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:29:14,097 INFO L87 Difference]: Start difference. First operand 122990 states and 268799 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:14,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:14,525 INFO L93 Difference]: Finished difference Result 130997 states and 284211 transitions. [2021-04-15 03:29:14,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:29:14,525 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:29:14,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:14,695 INFO L225 Difference]: With dead ends: 130997 [2021-04-15 03:29:14,695 INFO L226 Difference]: Without dead ends: 130997 [2021-04-15 03:29:14,695 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:29:14,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130997 states. [2021-04-15 03:29:16,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130997 to 123134. [2021-04-15 03:29:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123134 states, 123133 states have (on average 2.1853036960035084) internal successors, (269083), 123133 states have internal predecessors, (269083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123134 states to 123134 states and 269083 transitions. [2021-04-15 03:29:16,788 INFO L78 Accepts]: Start accepts. Automaton has 123134 states and 269083 transitions. Word has length 76 [2021-04-15 03:29:16,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:16,788 INFO L480 AbstractCegarLoop]: Abstraction has 123134 states and 269083 transitions. [2021-04-15 03:29:16,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:16,788 INFO L276 IsEmpty]: Start isEmpty. Operand 123134 states and 269083 transitions. [2021-04-15 03:29:16,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:29:16,861 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:16,861 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:17,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-04-15 03:29:17,062 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:17,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:17,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2113209467, now seen corresponding path program 113 times [2021-04-15 03:29:17,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:17,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292512033] [2021-04-15 03:29:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:29:17,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292512033] [2021-04-15 03:29:17,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643498250] [2021-04-15 03:29:17,107 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:17,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-04-15 03:29:17,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:17,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:29:17,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 113 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:29:17,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:17,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-04-15 03:29:17,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911433302] [2021-04-15 03:29:17,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:29:17,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:17,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:29:17,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:29:17,225 INFO L87 Difference]: Start difference. First operand 123134 states and 269083 transitions. Second operand has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:17,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:17,679 INFO L93 Difference]: Finished difference Result 145897 states and 315475 transitions. [2021-04-15 03:29:17,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:29:17,680 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:29:17,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:17,875 INFO L225 Difference]: With dead ends: 145897 [2021-04-15 03:29:17,875 INFO L226 Difference]: Without dead ends: 145897 [2021-04-15 03:29:17,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:29:18,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145897 states. [2021-04-15 03:29:19,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145897 to 123934. [2021-04-15 03:29:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123934 states, 123933 states have (on average 2.184720776548619) internal successors, (270759), 123933 states have internal predecessors, (270759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123934 states to 123934 states and 270759 transitions. [2021-04-15 03:29:19,973 INFO L78 Accepts]: Start accepts. Automaton has 123934 states and 270759 transitions. Word has length 76 [2021-04-15 03:29:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:19,973 INFO L480 AbstractCegarLoop]: Abstraction has 123934 states and 270759 transitions. [2021-04-15 03:29:19,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.909090909090909) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 123934 states and 270759 transitions. [2021-04-15 03:29:20,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:29:20,049 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:20,049 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:20,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-04-15 03:29:20,249 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:20,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:20,250 INFO L82 PathProgramCache]: Analyzing trace with hash -660344537, now seen corresponding path program 114 times [2021-04-15 03:29:20,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:20,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214057129] [2021-04-15 03:29:20,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:29:20,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214057129] [2021-04-15 03:29:20,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600105411] [2021-04-15 03:29:20,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:20,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-04-15 03:29:20,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:20,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:29:20,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:29:20,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:20,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:29:20,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367328571] [2021-04-15 03:29:20,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:29:20,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:20,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:29:20,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:29:20,427 INFO L87 Difference]: Start difference. First operand 123934 states and 270759 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:20,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:20,900 INFO L93 Difference]: Finished difference Result 146309 states and 316555 transitions. [2021-04-15 03:29:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:29:20,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:29:20,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:21,448 INFO L225 Difference]: With dead ends: 146309 [2021-04-15 03:29:21,448 INFO L226 Difference]: Without dead ends: 146309 [2021-04-15 03:29:21,448 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=226, Invalid=374, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:29:21,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146309 states. [2021-04-15 03:29:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146309 to 124414. [2021-04-15 03:29:23,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124414 states, 124413 states have (on average 2.1839438000852) internal successors, (271711), 124413 states have internal predecessors, (271711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124414 states to 124414 states and 271711 transitions. [2021-04-15 03:29:23,220 INFO L78 Accepts]: Start accepts. Automaton has 124414 states and 271711 transitions. Word has length 76 [2021-04-15 03:29:23,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:23,221 INFO L480 AbstractCegarLoop]: Abstraction has 124414 states and 271711 transitions. [2021-04-15 03:29:23,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 11 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:23,221 INFO L276 IsEmpty]: Start isEmpty. Operand 124414 states and 271711 transitions. [2021-04-15 03:29:23,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:29:23,299 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:23,299 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:23,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-04-15 03:29:23,501 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:23,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1773151493, now seen corresponding path program 115 times [2021-04-15 03:29:23,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:23,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158023666] [2021-04-15 03:29:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:29:23,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158023666] [2021-04-15 03:29:23,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52010308] [2021-04-15 03:29:23,556 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:23,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:29:23,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 90 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:29:23,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:23,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-04-15 03:29:23,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639330140] [2021-04-15 03:29:23,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:29:23,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:23,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:29:23,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:29:23,672 INFO L87 Difference]: Start difference. First operand 124414 states and 271711 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:24,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:24,502 INFO L93 Difference]: Finished difference Result 138029 states and 299093 transitions. [2021-04-15 03:29:24,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:29:24,502 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:29:24,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:24,662 INFO L225 Difference]: With dead ends: 138029 [2021-04-15 03:29:24,663 INFO L226 Difference]: Without dead ends: 138029 [2021-04-15 03:29:24,663 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-04-15 03:29:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138029 states. [2021-04-15 03:29:26,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138029 to 123854. [2021-04-15 03:29:26,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123854 states, 123853 states have (on average 2.1827085335034275) internal successors, (270335), 123853 states have internal predecessors, (270335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:26,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123854 states to 123854 states and 270335 transitions. [2021-04-15 03:29:26,881 INFO L78 Accepts]: Start accepts. Automaton has 123854 states and 270335 transitions. Word has length 76 [2021-04-15 03:29:26,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:26,881 INFO L480 AbstractCegarLoop]: Abstraction has 123854 states and 270335 transitions. [2021-04-15 03:29:26,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 12 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:26,881 INFO L276 IsEmpty]: Start isEmpty. Operand 123854 states and 270335 transitions. [2021-04-15 03:29:26,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:29:26,951 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:26,951 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:27,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:27,167 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:27,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:27,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2048129063, now seen corresponding path program 116 times [2021-04-15 03:29:27,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:27,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935506317] [2021-04-15 03:29:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:27,228 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:27,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935506317] [2021-04-15 03:29:27,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412740208] [2021-04-15 03:29:27,229 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:27,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:29:27,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:27,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:29:27,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 79 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:27,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:27,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-04-15 03:29:27,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861593884] [2021-04-15 03:29:27,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:29:27,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:27,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:29:27,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:29:27,353 INFO L87 Difference]: Start difference. First operand 123854 states and 270335 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:27,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:27,784 INFO L93 Difference]: Finished difference Result 128519 states and 279224 transitions. [2021-04-15 03:29:27,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:29:27,785 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:29:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:27,937 INFO L225 Difference]: With dead ends: 128519 [2021-04-15 03:29:27,937 INFO L226 Difference]: Without dead ends: 128519 [2021-04-15 03:29:27,937 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:29:28,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128519 states. [2021-04-15 03:29:29,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128519 to 117206. [2021-04-15 03:29:29,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117206 states, 117205 states have (on average 2.179659570837422) internal successors, (255467), 117205 states have internal predecessors, (255467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117206 states to 117206 states and 255467 transitions. [2021-04-15 03:29:29,955 INFO L78 Accepts]: Start accepts. Automaton has 117206 states and 255467 transitions. Word has length 76 [2021-04-15 03:29:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:29,955 INFO L480 AbstractCegarLoop]: Abstraction has 117206 states and 255467 transitions. [2021-04-15 03:29:29,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:29,956 INFO L276 IsEmpty]: Start isEmpty. Operand 117206 states and 255467 transitions. [2021-04-15 03:29:30,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:29:30,022 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:30,023 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:30,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-04-15 03:29:30,223 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:30,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:30,223 INFO L82 PathProgramCache]: Analyzing trace with hash -358200709, now seen corresponding path program 117 times [2021-04-15 03:29:30,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:30,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773937184] [2021-04-15 03:29:30,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-04-15 03:29:30,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773937184] [2021-04-15 03:29:30,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714731765] [2021-04-15 03:29:30,280 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:30,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-04-15 03:29:30,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:30,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:29:30,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 66 proven. 97 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-04-15 03:29:30,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:30,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-04-15 03:29:30,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773058560] [2021-04-15 03:29:30,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:29:30,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:30,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:29:30,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:29:30,393 INFO L87 Difference]: Start difference. First operand 117206 states and 255467 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:30,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:30,842 INFO L93 Difference]: Finished difference Result 128191 states and 279004 transitions. [2021-04-15 03:29:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:29:30,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:29:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:31,004 INFO L225 Difference]: With dead ends: 128191 [2021-04-15 03:29:31,004 INFO L226 Difference]: Without dead ends: 128065 [2021-04-15 03:29:31,005 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:29:31,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128065 states. [2021-04-15 03:29:32,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128065 to 122126. [2021-04-15 03:29:32,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.1861780962128967) internal successors, (266987), 122125 states have internal predecessors, (266987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266987 transitions. [2021-04-15 03:29:33,070 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266987 transitions. Word has length 76 [2021-04-15 03:29:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:33,070 INFO L480 AbstractCegarLoop]: Abstraction has 122126 states and 266987 transitions. [2021-04-15 03:29:33,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:33,070 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266987 transitions. [2021-04-15 03:29:33,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:29:33,147 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:33,147 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:33,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-04-15 03:29:33,347 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:33,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:33,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1595890949, now seen corresponding path program 118 times [2021-04-15 03:29:33,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:33,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456206897] [2021-04-15 03:29:33,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-04-15 03:29:33,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456206897] [2021-04-15 03:29:33,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151030159] [2021-04-15 03:29:33,395 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:33,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:29:33,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:33,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:29:33,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 70 proven. 95 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-04-15 03:29:33,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:33,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:29:33,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679356767] [2021-04-15 03:29:33,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:29:33,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:33,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:29:33,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:29:33,516 INFO L87 Difference]: Start difference. First operand 122126 states and 266987 transitions. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:33,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:33,951 INFO L93 Difference]: Finished difference Result 124343 states and 270490 transitions. [2021-04-15 03:29:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:29:33,952 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:29:33,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:34,109 INFO L225 Difference]: With dead ends: 124343 [2021-04-15 03:29:34,110 INFO L226 Difference]: Without dead ends: 124247 [2021-04-15 03:29:34,110 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:29:34,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124247 states. [2021-04-15 03:29:35,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124247 to 122126. [2021-04-15 03:29:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.185523029682702) internal successors, (266907), 122125 states have internal predecessors, (266907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266907 transitions. [2021-04-15 03:29:36,248 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266907 transitions. Word has length 76 [2021-04-15 03:29:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:36,248 INFO L480 AbstractCegarLoop]: Abstraction has 122126 states and 266907 transitions. [2021-04-15 03:29:36,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 11 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:36,248 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266907 transitions. [2021-04-15 03:29:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:29:36,328 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:36,328 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:36,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:36,529 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:36,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:36,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1654539205, now seen corresponding path program 119 times [2021-04-15 03:29:36,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:36,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044559140] [2021-04-15 03:29:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:36,573 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-04-15 03:29:36,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044559140] [2021-04-15 03:29:36,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219460043] [2021-04-15 03:29:36,573 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:36,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-04-15 03:29:36,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:36,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:29:36,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:36,691 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 80 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-04-15 03:29:36,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:36,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-04-15 03:29:36,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388491998] [2021-04-15 03:29:36,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:29:36,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:36,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:29:36,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:29:36,692 INFO L87 Difference]: Start difference. First operand 122126 states and 266907 transitions. Second operand has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:37,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:37,104 INFO L93 Difference]: Finished difference Result 123893 states and 269670 transitions. [2021-04-15 03:29:37,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:29:37,104 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:29:37,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:37,664 INFO L225 Difference]: With dead ends: 123893 [2021-04-15 03:29:37,664 INFO L226 Difference]: Without dead ends: 123827 [2021-04-15 03:29:37,664 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:29:37,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123827 states. [2021-04-15 03:29:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123827 to 122126. [2021-04-15 03:29:39,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 122125 states have (on average 2.185195496417605) internal successors, (266867), 122125 states have internal predecessors, (266867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:39,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 266867 transitions. [2021-04-15 03:29:39,366 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 266867 transitions. Word has length 76 [2021-04-15 03:29:39,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:39,366 INFO L480 AbstractCegarLoop]: Abstraction has 122126 states and 266867 transitions. [2021-04-15 03:29:39,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 10 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:39,367 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 266867 transitions. [2021-04-15 03:29:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:29:39,442 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:39,442 INFO L551 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:39,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:39,643 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:39,643 INFO L82 PathProgramCache]: Analyzing trace with hash 189567813, now seen corresponding path program 120 times [2021-04-15 03:29:39,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:39,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374839632] [2021-04-15 03:29:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:39,680 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 102 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:29:39,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374839632] [2021-04-15 03:29:39,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771700437] [2021-04-15 03:29:39,680 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:39,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-04-15 03:29:39,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:39,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:29:39,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-04-15 03:29:39,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:39,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-04-15 03:29:39,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406732336] [2021-04-15 03:29:39,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:29:39,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:39,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:29:39,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:29:39,869 INFO L87 Difference]: Start difference. First operand 122126 states and 266867 transitions. Second operand has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:40,837 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-04-15 03:29:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:41,649 INFO L93 Difference]: Finished difference Result 203383 states and 440408 transitions. [2021-04-15 03:29:41,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-04-15 03:29:41,649 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:29:41,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:41,949 INFO L225 Difference]: With dead ends: 203383 [2021-04-15 03:29:41,949 INFO L226 Difference]: Without dead ends: 203092 [2021-04-15 03:29:41,950 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 997.7ms TimeCoverageRelationStatistics Valid=782, Invalid=6190, Unknown=0, NotChecked=0, Total=6972 [2021-04-15 03:29:42,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203092 states. [2021-04-15 03:29:44,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203092 to 153026. [2021-04-15 03:29:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153026 states, 153025 states have (on average 2.1853487992158143) internal successors, (334413), 153025 states have internal predecessors, (334413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:44,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153026 states to 153026 states and 334413 transitions. [2021-04-15 03:29:44,677 INFO L78 Accepts]: Start accepts. Automaton has 153026 states and 334413 transitions. Word has length 76 [2021-04-15 03:29:44,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:44,677 INFO L480 AbstractCegarLoop]: Abstraction has 153026 states and 334413 transitions. [2021-04-15 03:29:44,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.7894736842105265) internal successors, (129), 18 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:44,678 INFO L276 IsEmpty]: Start isEmpty. Operand 153026 states and 334413 transitions. [2021-04-15 03:29:44,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-04-15 03:29:44,761 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:44,761 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:44,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:44,968 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:44,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:44,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1785917094, now seen corresponding path program 121 times [2021-04-15 03:29:44,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:44,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759634793] [2021-04-15 03:29:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 144 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:45,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759634793] [2021-04-15 03:29:45,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638144029] [2021-04-15 03:29:45,054 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:45,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:29:45,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 114 proven. 41 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-04-15 03:29:45,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:45,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 15 [2021-04-15 03:29:45,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128327861] [2021-04-15 03:29:45,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:29:45,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:45,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:29:45,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:29:45,164 INFO L87 Difference]: Start difference. First operand 153026 states and 334413 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:45,742 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-04-15 03:29:46,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:46,124 INFO L93 Difference]: Finished difference Result 163078 states and 354025 transitions. [2021-04-15 03:29:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:29:46,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-04-15 03:29:46,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:46,326 INFO L225 Difference]: With dead ends: 163078 [2021-04-15 03:29:46,326 INFO L226 Difference]: Without dead ends: 162830 [2021-04-15 03:29:46,326 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 526.8ms TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:29:46,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162830 states. [2021-04-15 03:29:48,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162830 to 153130. [2021-04-15 03:29:48,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153130 states, 153129 states have (on average 2.1844392636273993) internal successors, (334501), 153129 states have internal predecessors, (334501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153130 states to 153130 states and 334501 transitions. [2021-04-15 03:29:48,928 INFO L78 Accepts]: Start accepts. Automaton has 153130 states and 334501 transitions. Word has length 76 [2021-04-15 03:29:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:48,928 INFO L480 AbstractCegarLoop]: Abstraction has 153130 states and 334501 transitions. [2021-04-15 03:29:48,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 153130 states and 334501 transitions. [2021-04-15 03:29:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-04-15 03:29:49,086 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:49,086 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:49,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-04-15 03:29:49,287 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:49,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:49,287 INFO L82 PathProgramCache]: Analyzing trace with hash -316262490, now seen corresponding path program 122 times [2021-04-15 03:29:49,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:49,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770780011] [2021-04-15 03:29:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 132 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:49,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770780011] [2021-04-15 03:29:49,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667744611] [2021-04-15 03:29:49,405 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:49,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:29:49,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:49,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 03:29:49,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 132 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:49,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:49,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-04-15 03:29:49,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383570399] [2021-04-15 03:29:49,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 03:29:49,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:49,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 03:29:49,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:29:49,543 INFO L87 Difference]: Start difference. First operand 153130 states and 334501 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:50,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:50,731 INFO L93 Difference]: Finished difference Result 169486 states and 368744 transitions. [2021-04-15 03:29:50,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:29:50,732 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-04-15 03:29:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:50,966 INFO L225 Difference]: With dead ends: 169486 [2021-04-15 03:29:50,967 INFO L226 Difference]: Without dead ends: 169486 [2021-04-15 03:29:50,967 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 211.3ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-04-15 03:29:51,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169486 states. [2021-04-15 03:29:53,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169486 to 157008. [2021-04-15 03:29:53,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157008 states, 157007 states have (on average 2.18660951422548) internal successors, (343313), 157007 states have internal predecessors, (343313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:53,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157008 states to 157008 states and 343313 transitions. [2021-04-15 03:29:53,547 INFO L78 Accepts]: Start accepts. Automaton has 157008 states and 343313 transitions. Word has length 86 [2021-04-15 03:29:53,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:53,548 INFO L480 AbstractCegarLoop]: Abstraction has 157008 states and 343313 transitions. [2021-04-15 03:29:53,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:53,548 INFO L276 IsEmpty]: Start isEmpty. Operand 157008 states and 343313 transitions. [2021-04-15 03:29:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-04-15 03:29:53,710 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:53,710 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:53,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-04-15 03:29:53,918 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:53,918 INFO L82 PathProgramCache]: Analyzing trace with hash -342094170, now seen corresponding path program 123 times [2021-04-15 03:29:53,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:53,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156674171] [2021-04-15 03:29:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 161 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:53,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156674171] [2021-04-15 03:29:53,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372067598] [2021-04-15 03:29:53,976 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:54,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-04-15 03:29:54,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:54,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 03:29:54,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 161 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:54,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:54,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:29:54,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550563023] [2021-04-15 03:29:54,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:29:54,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:54,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:29:54,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:29:54,112 INFO L87 Difference]: Start difference. First operand 157008 states and 343313 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:54,648 INFO L93 Difference]: Finished difference Result 159720 states and 347802 transitions. [2021-04-15 03:29:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:29:54,649 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-04-15 03:29:54,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:55,452 INFO L225 Difference]: With dead ends: 159720 [2021-04-15 03:29:55,452 INFO L226 Difference]: Without dead ends: 159716 [2021-04-15 03:29:55,452 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:29:55,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159716 states. [2021-04-15 03:29:57,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159716 to 154858. [2021-04-15 03:29:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154858 states, 154857 states have (on average 2.1844734174109015) internal successors, (338281), 154857 states have internal predecessors, (338281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154858 states to 154858 states and 338281 transitions. [2021-04-15 03:29:58,094 INFO L78 Accepts]: Start accepts. Automaton has 154858 states and 338281 transitions. Word has length 86 [2021-04-15 03:29:58,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:29:58,094 INFO L480 AbstractCegarLoop]: Abstraction has 154858 states and 338281 transitions. [2021-04-15 03:29:58,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:58,094 INFO L276 IsEmpty]: Start isEmpty. Operand 154858 states and 338281 transitions. [2021-04-15 03:29:58,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-04-15 03:29:58,246 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:29:58,246 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:29:58,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:58,447 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:29:58,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:29:58,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1880023924, now seen corresponding path program 124 times [2021-04-15 03:29:58,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:29:58,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282170154] [2021-04-15 03:29:58,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:29:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:29:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 154 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:29:58,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282170154] [2021-04-15 03:29:58,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646977640] [2021-04-15 03:29:58,510 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:29:58,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:29:58,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:29:58,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:29:58,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:29:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 150 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:29:58,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:29:58,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2021-04-15 03:29:58,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108803150] [2021-04-15 03:29:58,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:29:58,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:29:58,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:29:58,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:29:58,695 INFO L87 Difference]: Start difference. First operand 154858 states and 338281 transitions. Second operand has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:29:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:29:59,377 INFO L93 Difference]: Finished difference Result 164918 states and 359351 transitions. [2021-04-15 03:29:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:29:59,378 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-04-15 03:29:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:29:59,593 INFO L225 Difference]: With dead ends: 164918 [2021-04-15 03:29:59,593 INFO L226 Difference]: Without dead ends: 164914 [2021-04-15 03:29:59,593 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 214.8ms TimeCoverageRelationStatistics Valid=311, Invalid=745, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 03:29:59,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164914 states. [2021-04-15 03:30:01,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164914 to 155138. [2021-04-15 03:30:02,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155138 states, 155137 states have (on average 2.1851718158788684) internal successors, (339001), 155137 states have internal predecessors, (339001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155138 states to 155138 states and 339001 transitions. [2021-04-15 03:30:02,320 INFO L78 Accepts]: Start accepts. Automaton has 155138 states and 339001 transitions. Word has length 86 [2021-04-15 03:30:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:02,320 INFO L480 AbstractCegarLoop]: Abstraction has 155138 states and 339001 transitions. [2021-04-15 03:30:02,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.473684210526316) internal successors, (123), 18 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:02,321 INFO L276 IsEmpty]: Start isEmpty. Operand 155138 states and 339001 transitions. [2021-04-15 03:30:03,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-04-15 03:30:03,108 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:03,108 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:03,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-04-15 03:30:03,321 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:03,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:03,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1015661798, now seen corresponding path program 125 times [2021-04-15 03:30:03,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:03,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67004615] [2021-04-15 03:30:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:03,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67004615] [2021-04-15 03:30:03,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042955964] [2021-04-15 03:30:03,381 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:03,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-04-15 03:30:03,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:03,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:30:03,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 146 proven. 87 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-04-15 03:30:03,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:03,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2021-04-15 03:30:03,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739215130] [2021-04-15 03:30:03,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:30:03,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:03,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:30:03,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:30:03,574 INFO L87 Difference]: Start difference. First operand 155138 states and 339001 transitions. Second operand has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:04,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:04,456 INFO L93 Difference]: Finished difference Result 162401 states and 354857 transitions. [2021-04-15 03:30:04,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 03:30:04,457 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-04-15 03:30:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:04,713 INFO L225 Difference]: With dead ends: 162401 [2021-04-15 03:30:04,713 INFO L226 Difference]: Without dead ends: 162246 [2021-04-15 03:30:04,713 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=458, Invalid=1102, Unknown=0, NotChecked=0, Total=1560 [2021-04-15 03:30:04,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162246 states. [2021-04-15 03:30:06,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162246 to 154498. [2021-04-15 03:30:06,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154498 states, 154497 states have (on average 2.185110390493019) internal successors, (337593), 154497 states have internal predecessors, (337593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:07,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154498 states to 154498 states and 337593 transitions. [2021-04-15 03:30:07,155 INFO L78 Accepts]: Start accepts. Automaton has 154498 states and 337593 transitions. Word has length 86 [2021-04-15 03:30:07,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:07,156 INFO L480 AbstractCegarLoop]: Abstraction has 154498 states and 337593 transitions. [2021-04-15 03:30:07,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.578947368421052) internal successors, (125), 18 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:07,156 INFO L276 IsEmpty]: Start isEmpty. Operand 154498 states and 337593 transitions. [2021-04-15 03:30:07,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-04-15 03:30:07,311 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:07,311 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:07,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-04-15 03:30:07,511 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash 381795686, now seen corresponding path program 126 times [2021-04-15 03:30:07,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:07,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601455844] [2021-04-15 03:30:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:07,552 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 75 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-04-15 03:30:07,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601455844] [2021-04-15 03:30:07,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846494995] [2021-04-15 03:30:07,552 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:07,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-04-15 03:30:07,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:07,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 03:30:07,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:07,701 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 75 proven. 155 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-04-15 03:30:07,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:07,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-04-15 03:30:07,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730646623] [2021-04-15 03:30:07,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:30:07,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:07,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:30:07,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:30:07,702 INFO L87 Difference]: Start difference. First operand 154498 states and 337593 transitions. Second operand has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:08,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:08,741 INFO L93 Difference]: Finished difference Result 187447 states and 406719 transitions. [2021-04-15 03:30:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:30:08,742 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-04-15 03:30:08,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:08,975 INFO L225 Difference]: With dead ends: 187447 [2021-04-15 03:30:08,975 INFO L226 Difference]: Without dead ends: 187447 [2021-04-15 03:30:08,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:30:09,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187447 states. [2021-04-15 03:30:11,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187447 to 159330. [2021-04-15 03:30:11,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159330 states, 159329 states have (on average 2.1893126800519678) internal successors, (348821), 159329 states have internal predecessors, (348821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159330 states to 159330 states and 348821 transitions. [2021-04-15 03:30:11,719 INFO L78 Accepts]: Start accepts. Automaton has 159330 states and 348821 transitions. Word has length 86 [2021-04-15 03:30:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:11,719 INFO L480 AbstractCegarLoop]: Abstraction has 159330 states and 348821 transitions. [2021-04-15 03:30:11,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 7.6) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 159330 states and 348821 transitions. [2021-04-15 03:30:11,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-04-15 03:30:11,868 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:11,868 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:12,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-04-15 03:30:12,084 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:12,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:12,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1887951014, now seen corresponding path program 127 times [2021-04-15 03:30:12,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:12,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361682212] [2021-04-15 03:30:12,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 110 proven. 120 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-04-15 03:30:12,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361682212] [2021-04-15 03:30:12,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140122587] [2021-04-15 03:30:12,122 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:12,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:30:12,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 108 proven. 126 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-04-15 03:30:12,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:12,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-04-15 03:30:12,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376141063] [2021-04-15 03:30:12,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:30:12,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:12,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:30:12,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:30:12,255 INFO L87 Difference]: Start difference. First operand 159330 states and 348821 transitions. Second operand has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:13,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:13,409 INFO L93 Difference]: Finished difference Result 195387 states and 423182 transitions. [2021-04-15 03:30:13,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:30:13,409 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-04-15 03:30:13,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:13,674 INFO L225 Difference]: With dead ends: 195387 [2021-04-15 03:30:13,674 INFO L226 Difference]: Without dead ends: 195323 [2021-04-15 03:30:13,674 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:30:13,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195323 states. [2021-04-15 03:30:16,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195323 to 159302. [2021-04-15 03:30:16,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159302 states, 159301 states have (on average 2.1885926642017313) internal successors, (348645), 159301 states have internal predecessors, (348645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:16,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159302 states to 159302 states and 348645 transitions. [2021-04-15 03:30:16,570 INFO L78 Accepts]: Start accepts. Automaton has 159302 states and 348645 transitions. Word has length 86 [2021-04-15 03:30:16,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:16,570 INFO L480 AbstractCegarLoop]: Abstraction has 159302 states and 348645 transitions. [2021-04-15 03:30:16,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 7.636363636363637) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:16,570 INFO L276 IsEmpty]: Start isEmpty. Operand 159302 states and 348645 transitions. [2021-04-15 03:30:16,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-04-15 03:30:16,717 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:16,717 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:16,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:16,918 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:16,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:16,918 INFO L82 PathProgramCache]: Analyzing trace with hash -565732340, now seen corresponding path program 128 times [2021-04-15 03:30:16,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:16,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433885452] [2021-04-15 03:30:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 101 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-04-15 03:30:16,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433885452] [2021-04-15 03:30:16,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527969524] [2021-04-15 03:30:16,965 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:16,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:16,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:16,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:30:16,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 131 proven. 103 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-04-15 03:30:17,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:17,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-04-15 03:30:17,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329147981] [2021-04-15 03:30:17,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:30:17,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:17,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:30:17,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:30:17,097 INFO L87 Difference]: Start difference. First operand 159302 states and 348645 transitions. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:18,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:18,291 INFO L93 Difference]: Finished difference Result 177150 states and 384101 transitions. [2021-04-15 03:30:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:30:18,292 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-04-15 03:30:18,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:18,550 INFO L225 Difference]: With dead ends: 177150 [2021-04-15 03:30:18,550 INFO L226 Difference]: Without dead ends: 177126 [2021-04-15 03:30:18,551 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:30:18,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177126 states. [2021-04-15 03:30:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177126 to 159386. [2021-04-15 03:30:21,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159386 states, 159385 states have (on average 2.1882674028296263) internal successors, (348777), 159385 states have internal predecessors, (348777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:21,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159386 states to 159386 states and 348777 transitions. [2021-04-15 03:30:21,435 INFO L78 Accepts]: Start accepts. Automaton has 159386 states and 348777 transitions. Word has length 86 [2021-04-15 03:30:21,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:21,435 INFO L480 AbstractCegarLoop]: Abstraction has 159386 states and 348777 transitions. [2021-04-15 03:30:21,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 11 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:21,436 INFO L276 IsEmpty]: Start isEmpty. Operand 159386 states and 348777 transitions. [2021-04-15 03:30:21,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-04-15 03:30:21,595 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:21,595 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:21,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:21,796 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:21,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:21,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2093645926, now seen corresponding path program 129 times [2021-04-15 03:30:21,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:21,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218308517] [2021-04-15 03:30:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 104 proven. 136 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:30:21,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218308517] [2021-04-15 03:30:21,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376291539] [2021-04-15 03:30:21,853 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:21,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-04-15 03:30:21,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:21,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2021-04-15 03:30:21,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-04-15 03:30:22,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:22,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2021-04-15 03:30:22,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51035720] [2021-04-15 03:30:22,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:30:22,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:22,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:30:22,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:30:22,084 INFO L87 Difference]: Start difference. First operand 159386 states and 348777 transitions. Second operand has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:24,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:24,794 INFO L93 Difference]: Finished difference Result 275251 states and 593414 transitions. [2021-04-15 03:30:24,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-04-15 03:30:24,794 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-04-15 03:30:24,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:25,242 INFO L225 Difference]: With dead ends: 275251 [2021-04-15 03:30:25,242 INFO L226 Difference]: Without dead ends: 275139 [2021-04-15 03:30:25,243 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4118 ImplicationChecksByTransitivity, 1011.8ms TimeCoverageRelationStatistics Valid=1037, Invalid=10519, Unknown=0, NotChecked=0, Total=11556 [2021-04-15 03:30:25,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275139 states. [2021-04-15 03:30:28,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275139 to 204668. [2021-04-15 03:30:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204668 states, 204667 states have (on average 2.1685713866915526) internal successors, (443835), 204667 states have internal predecessors, (443835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204668 states to 204668 states and 443835 transitions. [2021-04-15 03:30:29,698 INFO L78 Accepts]: Start accepts. Automaton has 204668 states and 443835 transitions. Word has length 86 [2021-04-15 03:30:29,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:29,698 INFO L480 AbstractCegarLoop]: Abstraction has 204668 states and 443835 transitions. [2021-04-15 03:30:29,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.260869565217392) internal successors, (144), 22 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:29,698 INFO L276 IsEmpty]: Start isEmpty. Operand 204668 states and 443835 transitions. [2021-04-15 03:30:29,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-04-15 03:30:29,809 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:29,809 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:30,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:30,010 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:30,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:30,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1967004549, now seen corresponding path program 130 times [2021-04-15 03:30:30,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:30,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232103382] [2021-04-15 03:30:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 196 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:30,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232103382] [2021-04-15 03:30:30,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474907580] [2021-04-15 03:30:30,063 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:30,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:30:30,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:30,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:30:30,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 144 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:30:30,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:30,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2021-04-15 03:30:30,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24170189] [2021-04-15 03:30:30,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 03:30:30,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:30,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 03:30:30,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:30:30,249 INFO L87 Difference]: Start difference. First operand 204668 states and 443835 transitions. Second operand has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:31,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:31,229 INFO L93 Difference]: Finished difference Result 247113 states and 534129 transitions. [2021-04-15 03:30:31,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:30:31,230 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-04-15 03:30:31,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:32,174 INFO L225 Difference]: With dead ends: 247113 [2021-04-15 03:30:32,174 INFO L226 Difference]: Without dead ends: 247095 [2021-04-15 03:30:32,175 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=420, Invalid=840, Unknown=0, NotChecked=0, Total=1260 [2021-04-15 03:30:32,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247095 states. [2021-04-15 03:30:34,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247095 to 223232. [2021-04-15 03:30:35,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223232 states, 223231 states have (on average 2.1722565414301775) internal successors, (484915), 223231 states have internal predecessors, (484915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223232 states to 223232 states and 484915 transitions. [2021-04-15 03:30:36,128 INFO L78 Accepts]: Start accepts. Automaton has 223232 states and 484915 transitions. Word has length 86 [2021-04-15 03:30:36,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:36,128 INFO L480 AbstractCegarLoop]: Abstraction has 223232 states and 484915 transitions. [2021-04-15 03:30:36,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.444444444444445) internal successors, (116), 17 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:36,129 INFO L276 IsEmpty]: Start isEmpty. Operand 223232 states and 484915 transitions. [2021-04-15 03:30:36,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-04-15 03:30:36,260 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:36,261 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:36,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-04-15 03:30:36,461 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:36,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:36,461 INFO L82 PathProgramCache]: Analyzing trace with hash 454346087, now seen corresponding path program 131 times [2021-04-15 03:30:36,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:36,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588519441] [2021-04-15 03:30:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 106 proven. 132 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 03:30:36,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588519441] [2021-04-15 03:30:36,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335814854] [2021-04-15 03:30:36,532 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:36,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-04-15 03:30:36,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:36,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:30:36,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-04-15 03:30:36,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:36,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-04-15 03:30:36,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382126983] [2021-04-15 03:30:36,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:30:36,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:36,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:30:36,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:30:36,659 INFO L87 Difference]: Start difference. First operand 223232 states and 484915 transitions. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:37,402 INFO L93 Difference]: Finished difference Result 226999 states and 490880 transitions. [2021-04-15 03:30:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:30:37,402 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-04-15 03:30:37,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:37,770 INFO L225 Difference]: With dead ends: 226999 [2021-04-15 03:30:37,770 INFO L226 Difference]: Without dead ends: 226645 [2021-04-15 03:30:37,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:30:38,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226645 states. [2021-04-15 03:30:41,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226645 to 217428. [2021-04-15 03:30:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217428 states, 217427 states have (on average 2.1668835977132557) internal successors, (471139), 217427 states have internal predecessors, (471139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217428 states to 217428 states and 471139 transitions. [2021-04-15 03:30:42,178 INFO L78 Accepts]: Start accepts. Automaton has 217428 states and 471139 transitions. Word has length 86 [2021-04-15 03:30:42,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:42,178 INFO L480 AbstractCegarLoop]: Abstraction has 217428 states and 471139 transitions. [2021-04-15 03:30:42,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:42,178 INFO L276 IsEmpty]: Start isEmpty. Operand 217428 states and 471139 transitions. [2021-04-15 03:30:42,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-04-15 03:30:42,320 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:42,320 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:42,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:42,533 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:42,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:42,533 INFO L82 PathProgramCache]: Analyzing trace with hash -400900165, now seen corresponding path program 132 times [2021-04-15 03:30:42,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:42,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505551832] [2021-04-15 03:30:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:30:42,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505551832] [2021-04-15 03:30:42,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20650570] [2021-04-15 03:30:42,591 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:42,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-04-15 03:30:42,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:42,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 03:30:42,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 126 proven. 114 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:30:42,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:42,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:30:42,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464149166] [2021-04-15 03:30:42,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:30:42,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:42,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:30:42,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:30:42,728 INFO L87 Difference]: Start difference. First operand 217428 states and 471139 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:43,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:43,464 INFO L93 Difference]: Finished difference Result 237756 states and 514448 transitions. [2021-04-15 03:30:43,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:30:43,465 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-04-15 03:30:43,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:43,855 INFO L225 Difference]: With dead ends: 237756 [2021-04-15 03:30:43,855 INFO L226 Difference]: Without dead ends: 237672 [2021-04-15 03:30:43,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:30:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237672 states. [2021-04-15 03:30:47,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237672 to 232076. [2021-04-15 03:30:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232076 states, 232075 states have (on average 2.170931810837014) internal successors, (503819), 232075 states have internal predecessors, (503819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:47,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232076 states to 232076 states and 503819 transitions. [2021-04-15 03:30:47,811 INFO L78 Accepts]: Start accepts. Automaton has 232076 states and 503819 transitions. Word has length 86 [2021-04-15 03:30:47,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:47,811 INFO L480 AbstractCegarLoop]: Abstraction has 232076 states and 503819 transitions. [2021-04-15 03:30:47,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:47,812 INFO L276 IsEmpty]: Start isEmpty. Operand 232076 states and 503819 transitions. [2021-04-15 03:30:47,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-04-15 03:30:47,969 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:47,969 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:48,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-04-15 03:30:48,170 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:48,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:48,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1535732903, now seen corresponding path program 133 times [2021-04-15 03:30:48,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:48,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129832245] [2021-04-15 03:30:48,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:48,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 141 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:48,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129832245] [2021-04-15 03:30:48,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182036747] [2021-04-15 03:30:48,826 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:48,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:48,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 03:30:48,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 141 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:49,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:49,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-04-15 03:30:49,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793891363] [2021-04-15 03:30:49,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 03:30:49,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:49,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 03:30:49,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:30:49,029 INFO L87 Difference]: Start difference. First operand 232076 states and 503819 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:49,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:49,888 INFO L93 Difference]: Finished difference Result 252517 states and 547531 transitions. [2021-04-15 03:30:49,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:30:49,888 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-04-15 03:30:49,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:50,254 INFO L225 Difference]: With dead ends: 252517 [2021-04-15 03:30:50,254 INFO L226 Difference]: Without dead ends: 252517 [2021-04-15 03:30:50,254 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 748.4ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-04-15 03:30:50,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252517 states. [2021-04-15 03:30:53,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252517 to 241564. [2021-04-15 03:30:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241564 states, 241563 states have (on average 2.17548631205938) internal successors, (525517), 241563 states have internal predecessors, (525517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:55,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241564 states to 241564 states and 525517 transitions. [2021-04-15 03:30:55,075 INFO L78 Accepts]: Start accepts. Automaton has 241564 states and 525517 transitions. Word has length 86 [2021-04-15 03:30:55,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:30:55,075 INFO L480 AbstractCegarLoop]: Abstraction has 241564 states and 525517 transitions. [2021-04-15 03:30:55,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:55,075 INFO L276 IsEmpty]: Start isEmpty. Operand 241564 states and 525517 transitions. [2021-04-15 03:30:55,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:30:55,297 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:30:55,307 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:30:55,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:55,524 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:30:55,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:30:55,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1737688229, now seen corresponding path program 134 times [2021-04-15 03:30:55,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:30:55,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727828369] [2021-04-15 03:30:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:30:55,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:30:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 169 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:55,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727828369] [2021-04-15 03:30:55,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44283589] [2021-04-15 03:30:55,679 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:30:55,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:30:55,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:30:55,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:30:55,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:30:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 169 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:30:55,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:30:55,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-04-15 03:30:55,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573269009] [2021-04-15 03:30:55,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-04-15 03:30:55,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:30:55,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-04-15 03:30:55,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:30:55,829 INFO L87 Difference]: Start difference. First operand 241564 states and 525517 transitions. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:30:56,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:30:56,954 INFO L93 Difference]: Finished difference Result 283927 states and 618212 transitions. [2021-04-15 03:30:56,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 03:30:56,954 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:30:56,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:30:57,410 INFO L225 Difference]: With dead ends: 283927 [2021-04-15 03:30:57,410 INFO L226 Difference]: Without dead ends: 283661 [2021-04-15 03:30:57,411 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=449, Invalid=883, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 03:30:58,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283661 states. [2021-04-15 03:31:01,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283661 to 277706. [2021-04-15 03:31:01,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277706 states, 277705 states have (on average 2.1876415620892673) internal successors, (607519), 277705 states have internal predecessors, (607519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:02,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277706 states to 277706 states and 607519 transitions. [2021-04-15 03:31:02,853 INFO L78 Accepts]: Start accepts. Automaton has 277706 states and 607519 transitions. Word has length 96 [2021-04-15 03:31:02,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:02,853 INFO L480 AbstractCegarLoop]: Abstraction has 277706 states and 607519 transitions. [2021-04-15 03:31:02,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:02,854 INFO L276 IsEmpty]: Start isEmpty. Operand 277706 states and 607519 transitions. [2021-04-15 03:31:03,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:31:03,054 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:03,054 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:03,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-04-15 03:31:03,255 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:03,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:03,255 INFO L82 PathProgramCache]: Analyzing trace with hash -232879921, now seen corresponding path program 135 times [2021-04-15 03:31:03,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:03,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956916662] [2021-04-15 03:31:03,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:03,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956916662] [2021-04-15 03:31:03,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932306655] [2021-04-15 03:31:03,314 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:03,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-04-15 03:31:03,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:03,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:31:03,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:03,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:03,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:31:03,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410361129] [2021-04-15 03:31:03,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:31:03,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:03,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:31:03,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:31:03,465 INFO L87 Difference]: Start difference. First operand 277706 states and 607519 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:05,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:05,000 INFO L93 Difference]: Finished difference Result 283289 states and 617046 transitions. [2021-04-15 03:31:05,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:31:05,001 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:31:05,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:05,435 INFO L225 Difference]: With dead ends: 283289 [2021-04-15 03:31:05,436 INFO L226 Difference]: Without dead ends: 283289 [2021-04-15 03:31:05,436 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:31:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283289 states. [2021-04-15 03:31:08,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283289 to 273694. [2021-04-15 03:31:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273694 states, 273693 states have (on average 2.184911561494083) internal successors, (597995), 273693 states have internal predecessors, (597995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273694 states to 273694 states and 597995 transitions. [2021-04-15 03:31:10,331 INFO L78 Accepts]: Start accepts. Automaton has 273694 states and 597995 transitions. Word has length 96 [2021-04-15 03:31:10,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:10,332 INFO L480 AbstractCegarLoop]: Abstraction has 273694 states and 597995 transitions. [2021-04-15 03:31:10,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:10,332 INFO L276 IsEmpty]: Start isEmpty. Operand 273694 states and 597995 transitions. [2021-04-15 03:31:10,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:31:10,532 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:10,532 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:10,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-04-15 03:31:10,732 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:10,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:10,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1493261733, now seen corresponding path program 136 times [2021-04-15 03:31:10,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:10,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454168335] [2021-04-15 03:31:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:31:10,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454168335] [2021-04-15 03:31:10,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101635562] [2021-04-15 03:31:10,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:10,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:31:10,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:10,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:31:10,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:31:10,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:10,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:31:10,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248133183] [2021-04-15 03:31:10,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:31:10,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:10,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:31:10,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:31:10,926 INFO L87 Difference]: Start difference. First operand 273694 states and 597995 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:11,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:11,814 INFO L93 Difference]: Finished difference Result 283158 states and 616236 transitions. [2021-04-15 03:31:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:31:11,814 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:31:11,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:12,873 INFO L225 Difference]: With dead ends: 283158 [2021-04-15 03:31:12,873 INFO L226 Difference]: Without dead ends: 283152 [2021-04-15 03:31:12,873 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:31:13,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283152 states. [2021-04-15 03:31:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283152 to 277546. [2021-04-15 03:31:16,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277546 states, 277545 states have (on average 2.1873894323443044) internal successors, (607099), 277545 states have internal predecessors, (607099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277546 states to 277546 states and 607099 transitions. [2021-04-15 03:31:17,735 INFO L78 Accepts]: Start accepts. Automaton has 277546 states and 607099 transitions. Word has length 96 [2021-04-15 03:31:17,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:17,735 INFO L480 AbstractCegarLoop]: Abstraction has 277546 states and 607099 transitions. [2021-04-15 03:31:17,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:17,735 INFO L276 IsEmpty]: Start isEmpty. Operand 277546 states and 607099 transitions. [2021-04-15 03:31:17,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:31:17,929 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:17,929 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:18,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:18,129 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:18,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:18,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1188536113, now seen corresponding path program 137 times [2021-04-15 03:31:18,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:18,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191979039] [2021-04-15 03:31:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 147 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:31:18,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191979039] [2021-04-15 03:31:18,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373535144] [2021-04-15 03:31:18,184 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:18,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-04-15 03:31:18,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:18,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:31:18,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:18,331 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 147 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:31:18,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:18,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:31:18,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381005702] [2021-04-15 03:31:18,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:31:18,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:18,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:31:18,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:31:18,332 INFO L87 Difference]: Start difference. First operand 277546 states and 607099 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:19,857 INFO L93 Difference]: Finished difference Result 287744 states and 625793 transitions. [2021-04-15 03:31:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:31:19,858 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:31:19,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:20,234 INFO L225 Difference]: With dead ends: 287744 [2021-04-15 03:31:20,234 INFO L226 Difference]: Without dead ends: 287744 [2021-04-15 03:31:20,235 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:31:20,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287744 states. [2021-04-15 03:31:23,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287744 to 277562. [2021-04-15 03:31:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277562 states, 277561 states have (on average 2.1872056953246313) internal successors, (607083), 277561 states have internal predecessors, (607083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:25,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277562 states to 277562 states and 607083 transitions. [2021-04-15 03:31:25,356 INFO L78 Accepts]: Start accepts. Automaton has 277562 states and 607083 transitions. Word has length 96 [2021-04-15 03:31:25,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:25,356 INFO L480 AbstractCegarLoop]: Abstraction has 277562 states and 607083 transitions. [2021-04-15 03:31:25,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:25,357 INFO L276 IsEmpty]: Start isEmpty. Operand 277562 states and 607083 transitions. [2021-04-15 03:31:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:31:25,582 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:25,582 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:25,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-04-15 03:31:25,793 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:25,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:25,793 INFO L82 PathProgramCache]: Analyzing trace with hash -798332187, now seen corresponding path program 138 times [2021-04-15 03:31:25,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:25,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837680178] [2021-04-15 03:31:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:25,855 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:25,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837680178] [2021-04-15 03:31:25,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110027596] [2021-04-15 03:31:25,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:25,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-04-15 03:31:25,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:25,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:31:25,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:31:26,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:26,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-04-15 03:31:26,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124312266] [2021-04-15 03:31:26,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:31:26,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:26,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:31:26,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:31:26,009 INFO L87 Difference]: Start difference. First operand 277562 states and 607083 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:27,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:27,572 INFO L93 Difference]: Finished difference Result 287474 states and 626678 transitions. [2021-04-15 03:31:27,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:31:27,572 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:31:27,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:27,985 INFO L225 Difference]: With dead ends: 287474 [2021-04-15 03:31:27,985 INFO L226 Difference]: Without dead ends: 287474 [2021-04-15 03:31:27,985 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=190, Invalid=316, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:31:28,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287474 states. [2021-04-15 03:31:31,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287474 to 273034. [2021-04-15 03:31:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273034 states, 273033 states have (on average 2.184860438115539) internal successors, (596539), 273033 states have internal predecessors, (596539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:33,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273034 states to 273034 states and 596539 transitions. [2021-04-15 03:31:33,247 INFO L78 Accepts]: Start accepts. Automaton has 273034 states and 596539 transitions. Word has length 96 [2021-04-15 03:31:33,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:33,247 INFO L480 AbstractCegarLoop]: Abstraction has 273034 states and 596539 transitions. [2021-04-15 03:31:33,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:33,247 INFO L276 IsEmpty]: Start isEmpty. Operand 273034 states and 596539 transitions. [2021-04-15 03:31:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:31:33,495 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:33,495 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:33,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:33,696 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:33,696 INFO L82 PathProgramCache]: Analyzing trace with hash 529753287, now seen corresponding path program 139 times [2021-04-15 03:31:33,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:33,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620614661] [2021-04-15 03:31:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 168 proven. 128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:31:33,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620614661] [2021-04-15 03:31:33,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019373015] [2021-04-15 03:31:33,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:33,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:31:33,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 168 proven. 128 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:31:33,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:33,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:31:33,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628810450] [2021-04-15 03:31:33,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:31:33,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:33,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:31:33,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:31:33,897 INFO L87 Difference]: Start difference. First operand 273034 states and 596539 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:35,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:35,652 INFO L93 Difference]: Finished difference Result 292897 states and 638403 transitions. [2021-04-15 03:31:35,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:31:35,653 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:31:35,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:36,070 INFO L225 Difference]: With dead ends: 292897 [2021-04-15 03:31:36,071 INFO L226 Difference]: Without dead ends: 292861 [2021-04-15 03:31:36,071 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:31:36,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292861 states. [2021-04-15 03:31:40,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292861 to 277790. [2021-04-15 03:31:40,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277790 states, 277789 states have (on average 2.1869656465878777) internal successors, (607515), 277789 states have internal predecessors, (607515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:41,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277790 states to 277790 states and 607515 transitions. [2021-04-15 03:31:41,647 INFO L78 Accepts]: Start accepts. Automaton has 277790 states and 607515 transitions. Word has length 96 [2021-04-15 03:31:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:41,647 INFO L480 AbstractCegarLoop]: Abstraction has 277790 states and 607515 transitions. [2021-04-15 03:31:41,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:41,647 INFO L276 IsEmpty]: Start isEmpty. Operand 277790 states and 607515 transitions. [2021-04-15 03:31:41,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:31:41,872 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:41,872 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:42,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:42,073 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:42,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:42,074 INFO L82 PathProgramCache]: Analyzing trace with hash -2053890469, now seen corresponding path program 140 times [2021-04-15 03:31:42,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:42,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617273149] [2021-04-15 03:31:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:42,125 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:31:42,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617273149] [2021-04-15 03:31:42,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224328923] [2021-04-15 03:31:42,125 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:42,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:31:42,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:42,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:31:42,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:31:42,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:42,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:31:42,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414861825] [2021-04-15 03:31:42,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:31:42,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:42,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:31:42,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:31:42,273 INFO L87 Difference]: Start difference. First operand 277790 states and 607515 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:43,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:43,849 INFO L93 Difference]: Finished difference Result 289842 states and 631433 transitions. [2021-04-15 03:31:43,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:31:43,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:31:43,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:44,327 INFO L225 Difference]: With dead ends: 289842 [2021-04-15 03:31:44,327 INFO L226 Difference]: Without dead ends: 289806 [2021-04-15 03:31:44,327 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:31:44,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289806 states. [2021-04-15 03:31:48,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289806 to 279306. [2021-04-15 03:31:48,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279306 states, 279305 states have (on average 2.1874259322246288) internal successors, (610959), 279305 states have internal predecessors, (610959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:49,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279306 states to 279306 states and 610959 transitions. [2021-04-15 03:31:49,655 INFO L78 Accepts]: Start accepts. Automaton has 279306 states and 610959 transitions. Word has length 96 [2021-04-15 03:31:49,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:49,655 INFO L480 AbstractCegarLoop]: Abstraction has 279306 states and 610959 transitions. [2021-04-15 03:31:49,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:49,655 INFO L276 IsEmpty]: Start isEmpty. Operand 279306 states and 610959 transitions. [2021-04-15 03:31:49,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:31:49,915 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:49,915 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:50,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:50,115 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:50,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1749164849, now seen corresponding path program 141 times [2021-04-15 03:31:50,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:50,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608182188] [2021-04-15 03:31:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:31:50,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608182188] [2021-04-15 03:31:50,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315033705] [2021-04-15 03:31:50,169 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:50,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-04-15 03:31:50,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:50,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:31:50,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 175 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:31:50,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:50,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:31:50,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177345845] [2021-04-15 03:31:50,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:31:50,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:50,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:31:50,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:31:50,327 INFO L87 Difference]: Start difference. First operand 279306 states and 610959 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:31:52,023 INFO L93 Difference]: Finished difference Result 293716 states and 638382 transitions. [2021-04-15 03:31:52,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:31:52,023 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:31:52,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:31:52,520 INFO L225 Difference]: With dead ends: 293716 [2021-04-15 03:31:52,520 INFO L226 Difference]: Without dead ends: 293716 [2021-04-15 03:31:52,520 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:31:52,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293716 states. [2021-04-15 03:31:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293716 to 279290. [2021-04-15 03:31:57,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279290 states, 279289 states have (on average 2.1870356512429776) internal successors, (610815), 279289 states have internal predecessors, (610815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279290 states to 279290 states and 610815 transitions. [2021-04-15 03:31:58,148 INFO L78 Accepts]: Start accepts. Automaton has 279290 states and 610815 transitions. Word has length 96 [2021-04-15 03:31:58,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:31:58,148 INFO L480 AbstractCegarLoop]: Abstraction has 279290 states and 610815 transitions. [2021-04-15 03:31:58,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:31:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 279290 states and 610815 transitions. [2021-04-15 03:31:58,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:31:58,405 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:31:58,406 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:31:58,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:58,606 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:31:58,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:31:58,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1358960923, now seen corresponding path program 142 times [2021-04-15 03:31:58,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:31:58,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992608488] [2021-04-15 03:31:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:31:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:31:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 170 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:31:58,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992608488] [2021-04-15 03:31:58,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863439691] [2021-04-15 03:31:58,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:31:58,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:31:58,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:31:58,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:31:58,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:31:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 170 proven. 130 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:31:58,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:31:58,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-04-15 03:31:58,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755581727] [2021-04-15 03:31:58,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:31:58,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:31:58,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:31:58,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:31:58,828 INFO L87 Difference]: Start difference. First operand 279290 states and 610815 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:00,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:00,611 INFO L93 Difference]: Finished difference Result 305876 states and 664178 transitions. [2021-04-15 03:32:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:32:00,612 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:32:00,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:01,115 INFO L225 Difference]: With dead ends: 305876 [2021-04-15 03:32:01,115 INFO L226 Difference]: Without dead ends: 305876 [2021-04-15 03:32:01,115 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:32:01,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305876 states. [2021-04-15 03:32:06,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305876 to 279450. [2021-04-15 03:32:06,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279450 states, 279449 states have (on average 2.186928562993605) internal successors, (611135), 279449 states have internal predecessors, (611135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279450 states to 279450 states and 611135 transitions. [2021-04-15 03:32:07,032 INFO L78 Accepts]: Start accepts. Automaton has 279450 states and 611135 transitions. Word has length 96 [2021-04-15 03:32:07,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:07,033 INFO L480 AbstractCegarLoop]: Abstraction has 279450 states and 611135 transitions. [2021-04-15 03:32:07,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:07,033 INFO L276 IsEmpty]: Start isEmpty. Operand 279450 states and 611135 transitions. [2021-04-15 03:32:07,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:32:07,982 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:07,983 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:08,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-04-15 03:32:08,197 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:08,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:08,197 INFO L82 PathProgramCache]: Analyzing trace with hash 93904007, now seen corresponding path program 143 times [2021-04-15 03:32:08,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:08,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19484484] [2021-04-15 03:32:08,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:08,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19484484] [2021-04-15 03:32:08,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719595060] [2021-04-15 03:32:08,264 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:08,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-04-15 03:32:08,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:08,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:32:08,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:32:08,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:08,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-04-15 03:32:08,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280375282] [2021-04-15 03:32:08,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:32:08,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:08,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:32:08,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:32:08,421 INFO L87 Difference]: Start difference. First operand 279450 states and 611135 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:09,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:09,395 INFO L93 Difference]: Finished difference Result 291374 states and 635903 transitions. [2021-04-15 03:32:09,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:32:09,396 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:32:09,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:09,848 INFO L225 Difference]: With dead ends: 291374 [2021-04-15 03:32:09,848 INFO L226 Difference]: Without dead ends: 291374 [2021-04-15 03:32:09,848 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=218, Invalid=382, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:32:10,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291374 states. [2021-04-15 03:32:14,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291374 to 275266. [2021-04-15 03:32:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275266 states, 275265 states have (on average 2.185221513813961) internal successors, (601515), 275265 states have internal predecessors, (601515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275266 states to 275266 states and 601515 transitions. [2021-04-15 03:32:16,096 INFO L78 Accepts]: Start accepts. Automaton has 275266 states and 601515 transitions. Word has length 96 [2021-04-15 03:32:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:16,097 INFO L480 AbstractCegarLoop]: Abstraction has 275266 states and 601515 transitions. [2021-04-15 03:32:16,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 275266 states and 601515 transitions. [2021-04-15 03:32:16,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:32:16,321 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:16,321 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:16,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-04-15 03:32:16,522 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:16,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:16,522 INFO L82 PathProgramCache]: Analyzing trace with hash 211982491, now seen corresponding path program 144 times [2021-04-15 03:32:16,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:16,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801727799] [2021-04-15 03:32:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-04-15 03:32:16,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801727799] [2021-04-15 03:32:16,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926433959] [2021-04-15 03:32:16,577 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:16,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-04-15 03:32:16,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:16,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:32:16,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 155 proven. 135 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-04-15 03:32:16,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:16,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:32:16,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072188690] [2021-04-15 03:32:16,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:32:16,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:16,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:32:16,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:32:16,722 INFO L87 Difference]: Start difference. First operand 275266 states and 601515 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:17,650 INFO L93 Difference]: Finished difference Result 284381 states and 619091 transitions. [2021-04-15 03:32:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:32:17,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:32:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:18,725 INFO L225 Difference]: With dead ends: 284381 [2021-04-15 03:32:18,725 INFO L226 Difference]: Without dead ends: 284315 [2021-04-15 03:32:18,725 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:32:18,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284315 states. [2021-04-15 03:32:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284315 to 279242. [2021-04-15 03:32:22,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279242 states, 279241 states have (on average 2.1870821261920708) internal successors, (610723), 279241 states have internal predecessors, (610723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279242 states to 279242 states and 610723 transitions. [2021-04-15 03:32:23,864 INFO L78 Accepts]: Start accepts. Automaton has 279242 states and 610723 transitions. Word has length 96 [2021-04-15 03:32:23,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:23,864 INFO L480 AbstractCegarLoop]: Abstraction has 279242 states and 610723 transitions. [2021-04-15 03:32:23,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:23,864 INFO L276 IsEmpty]: Start isEmpty. Operand 279242 states and 610723 transitions. [2021-04-15 03:32:24,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:32:24,092 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:24,092 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:24,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-04-15 03:32:24,292 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:24,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:24,292 INFO L82 PathProgramCache]: Analyzing trace with hash 194774565, now seen corresponding path program 145 times [2021-04-15 03:32:24,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:24,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794554616] [2021-04-15 03:32:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 188 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:32:24,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794554616] [2021-04-15 03:32:24,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791838521] [2021-04-15 03:32:24,343 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:24,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:32:24,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 188 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:32:24,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:24,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:32:24,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868628236] [2021-04-15 03:32:24,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:32:24,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:24,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:32:24,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:32:24,488 INFO L87 Difference]: Start difference. First operand 279242 states and 610723 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:25,458 INFO L93 Difference]: Finished difference Result 298839 states and 651898 transitions. [2021-04-15 03:32:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:32:25,458 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:32:25,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:26,755 INFO L225 Difference]: With dead ends: 298839 [2021-04-15 03:32:26,755 INFO L226 Difference]: Without dead ends: 298803 [2021-04-15 03:32:26,755 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:32:27,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298803 states. [2021-04-15 03:32:30,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298803 to 280042. [2021-04-15 03:32:30,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280042 states, 280041 states have (on average 2.1865476840891156) internal successors, (612323), 280041 states have internal predecessors, (612323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:31,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280042 states to 280042 states and 612323 transitions. [2021-04-15 03:32:31,600 INFO L78 Accepts]: Start accepts. Automaton has 280042 states and 612323 transitions. Word has length 96 [2021-04-15 03:32:31,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:31,600 INFO L480 AbstractCegarLoop]: Abstraction has 280042 states and 612323 transitions. [2021-04-15 03:32:31,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:31,600 INFO L276 IsEmpty]: Start isEmpty. Operand 280042 states and 612323 transitions. [2021-04-15 03:32:31,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:32:31,817 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:31,817 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:32,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-04-15 03:32:32,018 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:32,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:32,018 INFO L82 PathProgramCache]: Analyzing trace with hash -794721701, now seen corresponding path program 146 times [2021-04-15 03:32:32,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:32,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603163486] [2021-04-15 03:32:32,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 223 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:32:32,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603163486] [2021-04-15 03:32:32,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620250134] [2021-04-15 03:32:32,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:32,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:32:32,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:32,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:32:32,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 223 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:32:32,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:32,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:32:32,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525393574] [2021-04-15 03:32:32,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:32:32,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:32,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:32:32,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:32:32,220 INFO L87 Difference]: Start difference. First operand 280042 states and 612323 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:33,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:33,083 INFO L93 Difference]: Finished difference Result 294586 states and 641708 transitions. [2021-04-15 03:32:33,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:32:33,084 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:32:33,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:34,076 INFO L225 Difference]: With dead ends: 294586 [2021-04-15 03:32:34,077 INFO L226 Difference]: Without dead ends: 294544 [2021-04-15 03:32:34,077 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:32:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294544 states. [2021-04-15 03:32:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294544 to 284094. [2021-04-15 03:32:37,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284094 states, 284093 states have (on average 2.187280221617569) internal successors, (621391), 284093 states have internal predecessors, (621391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284094 states to 284094 states and 621391 transitions. [2021-04-15 03:32:38,770 INFO L78 Accepts]: Start accepts. Automaton has 284094 states and 621391 transitions. Word has length 96 [2021-04-15 03:32:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:38,770 INFO L480 AbstractCegarLoop]: Abstraction has 284094 states and 621391 transitions. [2021-04-15 03:32:38,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 284094 states and 621391 transitions. [2021-04-15 03:32:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:32:38,973 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:38,973 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:39,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-04-15 03:32:39,173 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:39,174 INFO L82 PathProgramCache]: Analyzing trace with hash -489996081, now seen corresponding path program 147 times [2021-04-15 03:32:39,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:39,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999534877] [2021-04-15 03:32:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:39,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 195 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:32:39,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999534877] [2021-04-15 03:32:39,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849865907] [2021-04-15 03:32:39,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:39,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-04-15 03:32:39,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:39,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:32:39,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 195 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:32:39,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:39,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:32:39,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773151938] [2021-04-15 03:32:39,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:32:39,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:39,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:32:39,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:32:39,376 INFO L87 Difference]: Start difference. First operand 284094 states and 621391 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:40,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:40,885 INFO L93 Difference]: Finished difference Result 301944 states and 656167 transitions. [2021-04-15 03:32:40,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:32:40,886 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:32:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:41,283 INFO L225 Difference]: With dead ends: 301944 [2021-04-15 03:32:41,283 INFO L226 Difference]: Without dead ends: 301944 [2021-04-15 03:32:41,283 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:32:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301944 states. [2021-04-15 03:32:44,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301944 to 284134. [2021-04-15 03:32:45,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284134 states, 284133 states have (on average 2.186831519042139) internal successors, (621351), 284133 states have internal predecessors, (621351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284134 states to 284134 states and 621351 transitions. [2021-04-15 03:32:46,296 INFO L78 Accepts]: Start accepts. Automaton has 284134 states and 621351 transitions. Word has length 96 [2021-04-15 03:32:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:46,296 INFO L480 AbstractCegarLoop]: Abstraction has 284134 states and 621351 transitions. [2021-04-15 03:32:46,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 284134 states and 621351 transitions. [2021-04-15 03:32:46,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:32:46,516 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:46,516 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:46,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-04-15 03:32:46,716 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:46,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:46,717 INFO L82 PathProgramCache]: Analyzing trace with hash -99792155, now seen corresponding path program 148 times [2021-04-15 03:32:46,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:46,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523112355] [2021-04-15 03:32:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:46,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 191 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:32:46,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523112355] [2021-04-15 03:32:46,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575893662] [2021-04-15 03:32:46,771 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:32:46,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:32:46,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:46,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:32:46,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 191 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:32:46,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:46,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-04-15 03:32:46,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603497375] [2021-04-15 03:32:46,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:32:46,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:46,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:32:46,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:32:46,938 INFO L87 Difference]: Start difference. First operand 284134 states and 621351 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:48,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:48,441 INFO L93 Difference]: Finished difference Result 329236 states and 714209 transitions. [2021-04-15 03:32:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:32:48,441 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:32:48,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:48,869 INFO L225 Difference]: With dead ends: 329236 [2021-04-15 03:32:48,869 INFO L226 Difference]: Without dead ends: 329236 [2021-04-15 03:32:48,869 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=231, Invalid=369, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:32:49,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329236 states. [2021-04-15 03:32:53,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329236 to 284210. [2021-04-15 03:32:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284210 states, 284209 states have (on average 2.1864367419750956) internal successors, (621405), 284209 states have internal predecessors, (621405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:53,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284210 states to 284210 states and 621405 transitions. [2021-04-15 03:32:53,956 INFO L78 Accepts]: Start accepts. Automaton has 284210 states and 621405 transitions. Word has length 96 [2021-04-15 03:32:53,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:32:53,957 INFO L480 AbstractCegarLoop]: Abstraction has 284210 states and 621405 transitions. [2021-04-15 03:32:53,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:53,957 INFO L276 IsEmpty]: Start isEmpty. Operand 284210 states and 621405 transitions. [2021-04-15 03:32:54,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:32:54,189 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:32:54,189 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:32:54,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:54,390 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:32:54,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:32:54,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1353072775, now seen corresponding path program 149 times [2021-04-15 03:32:54,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:32:54,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953034222] [2021-04-15 03:32:54,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:32:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:32:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 166 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:32:54,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953034222] [2021-04-15 03:32:54,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805144173] [2021-04-15 03:32:54,452 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:32:54,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-04-15 03:32:54,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:32:54,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:32:54,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:32:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 166 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:32:54,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:32:54,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-04-15 03:32:54,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046360780] [2021-04-15 03:32:54,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:32:54,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:32:54,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:32:54,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:32:54,603 INFO L87 Difference]: Start difference. First operand 284210 states and 621405 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:32:56,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:32:56,273 INFO L93 Difference]: Finished difference Result 319340 states and 693417 transitions. [2021-04-15 03:32:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:32:56,273 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:32:56,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:32:56,668 INFO L225 Difference]: With dead ends: 319340 [2021-04-15 03:32:56,669 INFO L226 Difference]: Without dead ends: 319340 [2021-04-15 03:32:56,669 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=263, Invalid=439, Unknown=0, NotChecked=0, Total=702 [2021-04-15 03:32:57,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319340 states. [2021-04-15 03:33:01,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319340 to 284530. [2021-04-15 03:33:01,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284530 states, 284529 states have (on average 2.186227062970734) internal successors, (622045), 284529 states have internal predecessors, (622045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:02,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284530 states to 284530 states and 622045 transitions. [2021-04-15 03:33:02,037 INFO L78 Accepts]: Start accepts. Automaton has 284530 states and 622045 transitions. Word has length 96 [2021-04-15 03:33:02,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:02,037 INFO L480 AbstractCegarLoop]: Abstraction has 284530 states and 622045 transitions. [2021-04-15 03:33:02,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:02,037 INFO L276 IsEmpty]: Start isEmpty. Operand 284530 states and 622045 transitions. [2021-04-15 03:33:02,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:33:02,268 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:02,268 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:02,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:02,469 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:02,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:02,469 INFO L82 PathProgramCache]: Analyzing trace with hash -508398491, now seen corresponding path program 150 times [2021-04-15 03:33:02,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:02,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627805063] [2021-04-15 03:33:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:02,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627805063] [2021-04-15 03:33:02,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570669769] [2021-04-15 03:33:02,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:02,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-04-15 03:33:02,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:02,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:33:02,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:03,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:03,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-04-15 03:33:03,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382425725] [2021-04-15 03:33:03,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:33:03,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:03,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:33:03,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:33:03,407 INFO L87 Difference]: Start difference. First operand 284530 states and 622045 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:04,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:04,378 INFO L93 Difference]: Finished difference Result 297354 states and 649674 transitions. [2021-04-15 03:33:04,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:33:04,379 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:33:04,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:04,805 INFO L225 Difference]: With dead ends: 297354 [2021-04-15 03:33:04,806 INFO L226 Difference]: Without dead ends: 297354 [2021-04-15 03:33:04,806 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=249, Invalid=453, Unknown=0, NotChecked=0, Total=702 [2021-04-15 03:33:05,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297354 states. [2021-04-15 03:33:09,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297354 to 282646. [2021-04-15 03:33:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282646 states, 282645 states have (on average 2.186350368837234) internal successors, (617961), 282645 states have internal predecessors, (617961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282646 states to 282646 states and 617961 transitions. [2021-04-15 03:33:09,878 INFO L78 Accepts]: Start accepts. Automaton has 282646 states and 617961 transitions. Word has length 96 [2021-04-15 03:33:09,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:09,878 INFO L480 AbstractCegarLoop]: Abstraction has 282646 states and 617961 transitions. [2021-04-15 03:33:09,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:09,878 INFO L276 IsEmpty]: Start isEmpty. Operand 282646 states and 617961 transitions. [2021-04-15 03:33:10,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:33:10,777 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:10,777 INFO L551 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:10,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:10,992 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:10,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:10,992 INFO L82 PathProgramCache]: Analyzing trace with hash 343907052, now seen corresponding path program 151 times [2021-04-15 03:33:10,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:10,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015989790] [2021-04-15 03:33:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:11,066 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 141 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:33:11,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015989790] [2021-04-15 03:33:11,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328468306] [2021-04-15 03:33:11,066 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:11,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2021-04-15 03:33:11,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:11,199 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 201 proven. 83 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-04-15 03:33:11,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:11,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 14 [2021-04-15 03:33:11,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849614421] [2021-04-15 03:33:11,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:33:11,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:11,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:33:11,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:33:11,200 INFO L87 Difference]: Start difference. First operand 282646 states and 617961 transitions. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:12,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:12,559 INFO L93 Difference]: Finished difference Result 296638 states and 645293 transitions. [2021-04-15 03:33:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:33:12,559 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:33:12,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:13,010 INFO L225 Difference]: With dead ends: 296638 [2021-04-15 03:33:13,010 INFO L226 Difference]: Without dead ends: 296566 [2021-04-15 03:33:13,010 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-04-15 03:33:13,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296566 states. [2021-04-15 03:33:17,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296566 to 282646. [2021-04-15 03:33:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282646 states, 282645 states have (on average 2.1860107201613332) internal successors, (617865), 282645 states have internal predecessors, (617865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282646 states to 282646 states and 617865 transitions. [2021-04-15 03:33:17,985 INFO L78 Accepts]: Start accepts. Automaton has 282646 states and 617865 transitions. Word has length 96 [2021-04-15 03:33:17,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:17,986 INFO L480 AbstractCegarLoop]: Abstraction has 282646 states and 617865 transitions. [2021-04-15 03:33:17,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 14 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:17,986 INFO L276 IsEmpty]: Start isEmpty. Operand 282646 states and 617865 transitions. [2021-04-15 03:33:18,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:33:18,210 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:18,210 INFO L551 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:18,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:18,411 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:18,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1564912452, now seen corresponding path program 152 times [2021-04-15 03:33:18,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:18,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736001749] [2021-04-15 03:33:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:18,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 145 proven. 164 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-04-15 03:33:18,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736001749] [2021-04-15 03:33:18,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119229445] [2021-04-15 03:33:18,458 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:18,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:33:18,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:18,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:33:18,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 145 proven. 164 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-04-15 03:33:18,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:18,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-04-15 03:33:18,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080697903] [2021-04-15 03:33:18,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:33:18,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:18,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:33:18,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:33:18,607 INFO L87 Difference]: Start difference. First operand 282646 states and 617865 transitions. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:20,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:20,009 INFO L93 Difference]: Finished difference Result 298171 states and 649070 transitions. [2021-04-15 03:33:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:33:20,010 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:33:20,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:20,399 INFO L225 Difference]: With dead ends: 298171 [2021-04-15 03:33:20,399 INFO L226 Difference]: Without dead ends: 298171 [2021-04-15 03:33:20,399 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:33:20,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298171 states. [2021-04-15 03:33:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298171 to 282022. [2021-04-15 03:33:24,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282022 states, 282021 states have (on average 2.1855925622560024) internal successors, (616383), 282021 states have internal predecessors, (616383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282022 states to 282022 states and 616383 transitions. [2021-04-15 03:33:25,377 INFO L78 Accepts]: Start accepts. Automaton has 282022 states and 616383 transitions. Word has length 96 [2021-04-15 03:33:25,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:25,377 INFO L480 AbstractCegarLoop]: Abstraction has 282022 states and 616383 transitions. [2021-04-15 03:33:25,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 10 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:25,377 INFO L276 IsEmpty]: Start isEmpty. Operand 282022 states and 616383 transitions. [2021-04-15 03:33:25,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:33:25,608 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:25,608 INFO L551 BasicCegarLoop]: trace histogram [11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:25,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:25,809 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:25,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:25,809 INFO L82 PathProgramCache]: Analyzing trace with hash -64413626, now seen corresponding path program 153 times [2021-04-15 03:33:25,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:25,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938214347] [2021-04-15 03:33:25,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 124 proven. 183 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-04-15 03:33:25,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938214347] [2021-04-15 03:33:25,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241588263] [2021-04-15 03:33:25,847 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:25,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-04-15 03:33:25,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:25,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2021-04-15 03:33:25,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 6 proven. 256 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-04-15 03:33:26,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:26,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 22 [2021-04-15 03:33:26,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917261079] [2021-04-15 03:33:26,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-04-15 03:33:26,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:26,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-04-15 03:33:26,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:33:26,098 INFO L87 Difference]: Start difference. First operand 282022 states and 616383 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:26,887 WARN L205 SmtUtils]: Spent 585.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-04-15 03:33:29,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:29,835 INFO L93 Difference]: Finished difference Result 527818 states and 1143066 transitions. [2021-04-15 03:33:29,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-04-15 03:33:29,835 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:33:29,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:30,602 INFO L225 Difference]: With dead ends: 527818 [2021-04-15 03:33:30,603 INFO L226 Difference]: Without dead ends: 527644 [2021-04-15 03:33:30,603 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4599 ImplicationChecksByTransitivity, 1650.4ms TimeCoverageRelationStatistics Valid=1106, Invalid=12004, Unknown=0, NotChecked=0, Total=13110 [2021-04-15 03:33:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527644 states. [2021-04-15 03:33:37,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527644 to 396232. [2021-04-15 03:33:37,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396232 states, 396231 states have (on average 2.1780552253609637) internal successors, (863013), 396231 states have internal predecessors, (863013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:39,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396232 states to 396232 states and 863013 transitions. [2021-04-15 03:33:39,001 INFO L78 Accepts]: Start accepts. Automaton has 396232 states and 863013 transitions. Word has length 96 [2021-04-15 03:33:39,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:39,001 INFO L480 AbstractCegarLoop]: Abstraction has 396232 states and 863013 transitions. [2021-04-15 03:33:39,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:39,001 INFO L276 IsEmpty]: Start isEmpty. Operand 396232 states and 863013 transitions. [2021-04-15 03:33:39,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:33:39,207 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:39,208 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:39,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:39,417 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:39,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:39,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1559341669, now seen corresponding path program 154 times [2021-04-15 03:33:39,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:39,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502444492] [2021-04-15 03:33:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:39,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 165 proven. 125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-04-15 03:33:39,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502444492] [2021-04-15 03:33:39,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629509669] [2021-04-15 03:33:39,468 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:39,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:33:39,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:39,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:33:39,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 165 proven. 125 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-04-15 03:33:39,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:39,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:33:39,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22568843] [2021-04-15 03:33:39,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:33:39,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:39,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:33:39,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:33:39,611 INFO L87 Difference]: Start difference. First operand 396232 states and 863013 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:41,346 INFO L93 Difference]: Finished difference Result 407321 states and 884626 transitions. [2021-04-15 03:33:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:33:41,347 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:33:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:41,923 INFO L225 Difference]: With dead ends: 407321 [2021-04-15 03:33:41,924 INFO L226 Difference]: Without dead ends: 407255 [2021-04-15 03:33:41,924 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:33:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407255 states. [2021-04-15 03:33:47,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407255 to 401628. [2021-04-15 03:33:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401628 states, 401627 states have (on average 2.1796965841439944) internal successors, (875425), 401627 states have internal predecessors, (875425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401628 states to 401628 states and 875425 transitions. [2021-04-15 03:33:48,904 INFO L78 Accepts]: Start accepts. Automaton has 401628 states and 875425 transitions. Word has length 96 [2021-04-15 03:33:48,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:33:48,904 INFO L480 AbstractCegarLoop]: Abstraction has 401628 states and 875425 transitions. [2021-04-15 03:33:48,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 401628 states and 875425 transitions. [2021-04-15 03:33:49,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:33:49,144 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:33:49,144 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:33:49,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:49,345 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:33:49,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:33:49,345 INFO L82 PathProgramCache]: Analyzing trace with hash 408916935, now seen corresponding path program 155 times [2021-04-15 03:33:49,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:33:49,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827208217] [2021-04-15 03:33:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:33:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:33:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 198 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:33:49,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827208217] [2021-04-15 03:33:49,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098288271] [2021-04-15 03:33:49,394 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:33:49,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-04-15 03:33:49,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:33:49,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:33:49,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:33:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 198 proven. 98 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:33:49,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:33:49,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:33:49,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469982476] [2021-04-15 03:33:49,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:33:49,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:33:49,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:33:49,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:33:49,540 INFO L87 Difference]: Start difference. First operand 401628 states and 875425 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:33:51,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:33:51,295 INFO L93 Difference]: Finished difference Result 427365 states and 929947 transitions. [2021-04-15 03:33:51,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:33:51,296 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:33:51,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:33:51,920 INFO L225 Difference]: With dead ends: 427365 [2021-04-15 03:33:51,920 INFO L226 Difference]: Without dead ends: 427293 [2021-04-15 03:33:51,920 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:33:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427293 states. [2021-04-15 03:33:58,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427293 to 403688. [2021-04-15 03:33:58,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403688 states, 403687 states have (on average 2.1797308310646617) internal successors, (879929), 403687 states have internal predecessors, (879929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403688 states to 403688 states and 879929 transitions. [2021-04-15 03:34:00,067 INFO L78 Accepts]: Start accepts. Automaton has 403688 states and 879929 transitions. Word has length 96 [2021-04-15 03:34:00,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:34:00,067 INFO L480 AbstractCegarLoop]: Abstraction has 403688 states and 879929 transitions. [2021-04-15 03:34:00,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:00,067 INFO L276 IsEmpty]: Start isEmpty. Operand 403688 states and 879929 transitions. [2021-04-15 03:34:00,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:34:00,397 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:34:00,397 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:34:00,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-04-15 03:34:00,612 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:34:00,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:34:00,613 INFO L82 PathProgramCache]: Analyzing trace with hash -7602597, now seen corresponding path program 156 times [2021-04-15 03:34:00,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:34:00,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624378861] [2021-04-15 03:34:00,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:34:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:34:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 233 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:34:00,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624378861] [2021-04-15 03:34:00,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154027480] [2021-04-15 03:34:00,661 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:34:00,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-04-15 03:34:00,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:34:00,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:34:00,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:34:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 233 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:34:00,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:34:00,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:34:00,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525814570] [2021-04-15 03:34:00,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:34:00,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:34:00,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:34:00,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:34:00,820 INFO L87 Difference]: Start difference. First operand 403688 states and 879929 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:03,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:34:03,047 INFO L93 Difference]: Finished difference Result 425634 states and 925391 transitions. [2021-04-15 03:34:03,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:34:03,048 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:34:03,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:34:03,758 INFO L225 Difference]: With dead ends: 425634 [2021-04-15 03:34:03,758 INFO L226 Difference]: Without dead ends: 425592 [2021-04-15 03:34:03,758 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:34:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425592 states. [2021-04-15 03:34:09,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425592 to 412428. [2021-04-15 03:34:10,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412428 states, 412427 states have (on average 2.1807131928801944) internal successors, (899385), 412427 states have internal predecessors, (899385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412428 states to 412428 states and 899385 transitions. [2021-04-15 03:34:11,198 INFO L78 Accepts]: Start accepts. Automaton has 412428 states and 899385 transitions. Word has length 96 [2021-04-15 03:34:11,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:34:11,198 INFO L480 AbstractCegarLoop]: Abstraction has 412428 states and 899385 transitions. [2021-04-15 03:34:11,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:11,198 INFO L276 IsEmpty]: Start isEmpty. Operand 412428 states and 899385 transitions. [2021-04-15 03:34:12,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:34:12,150 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:34:12,150 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:34:12,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-04-15 03:34:12,365 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:34:12,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:34:12,365 INFO L82 PathProgramCache]: Analyzing trace with hash 297123023, now seen corresponding path program 157 times [2021-04-15 03:34:12,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:34:12,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103063455] [2021-04-15 03:34:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:34:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:34:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:34:12,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103063455] [2021-04-15 03:34:12,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621291878] [2021-04-15 03:34:12,413 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:34:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:34:12,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:34:12,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:34:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:34:12,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:34:12,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:34:12,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809378009] [2021-04-15 03:34:12,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:34:12,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:34:12,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:34:12,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:34:12,561 INFO L87 Difference]: Start difference. First operand 412428 states and 899385 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:14,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:34:14,283 INFO L93 Difference]: Finished difference Result 439240 states and 953108 transitions. [2021-04-15 03:34:14,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:34:14,284 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:34:14,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:34:14,964 INFO L225 Difference]: With dead ends: 439240 [2021-04-15 03:34:14,964 INFO L226 Difference]: Without dead ends: 439240 [2021-04-15 03:34:14,964 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:34:15,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439240 states. [2021-04-15 03:34:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439240 to 412684. [2021-04-15 03:34:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412684 states, 412683 states have (on average 2.1804266228557996) internal successors, (899825), 412683 states have internal predecessors, (899825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:22,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412684 states to 412684 states and 899825 transitions. [2021-04-15 03:34:22,316 INFO L78 Accepts]: Start accepts. Automaton has 412684 states and 899825 transitions. Word has length 96 [2021-04-15 03:34:22,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:34:22,316 INFO L480 AbstractCegarLoop]: Abstraction has 412684 states and 899825 transitions. [2021-04-15 03:34:22,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:22,316 INFO L276 IsEmpty]: Start isEmpty. Operand 412684 states and 899825 transitions. [2021-04-15 03:34:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:34:22,579 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:34:22,579 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:34:22,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-04-15 03:34:22,783 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:34:22,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:34:22,783 INFO L82 PathProgramCache]: Analyzing trace with hash 687326949, now seen corresponding path program 158 times [2021-04-15 03:34:22,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:34:22,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084959681] [2021-04-15 03:34:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:34:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:34:22,837 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 202 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:34:22,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084959681] [2021-04-15 03:34:22,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274688420] [2021-04-15 03:34:22,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:34:22,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:34:22,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:34:22,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:34:22,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:34:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 202 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:34:23,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:34:23,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-04-15 03:34:23,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217042525] [2021-04-15 03:34:23,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:34:23,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:34:23,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:34:23,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:34:23,010 INFO L87 Difference]: Start difference. First operand 412684 states and 899825 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:24,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:34:24,981 INFO L93 Difference]: Finished difference Result 495432 states and 1073586 transitions. [2021-04-15 03:34:24,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:34:24,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:34:24,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:34:25,767 INFO L225 Difference]: With dead ends: 495432 [2021-04-15 03:34:25,767 INFO L226 Difference]: Without dead ends: 495432 [2021-04-15 03:34:25,767 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=250, Invalid=400, Unknown=0, NotChecked=0, Total=650 [2021-04-15 03:34:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495432 states. [2021-04-15 03:34:32,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495432 to 413220. [2021-04-15 03:34:32,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413220 states, 413219 states have (on average 2.1798634622318915) internal successors, (900761), 413219 states have internal predecessors, (900761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413220 states to 413220 states and 900761 transitions. [2021-04-15 03:34:34,710 INFO L78 Accepts]: Start accepts. Automaton has 413220 states and 900761 transitions. Word has length 96 [2021-04-15 03:34:34,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:34:34,710 INFO L480 AbstractCegarLoop]: Abstraction has 413220 states and 900761 transitions. [2021-04-15 03:34:34,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:34,710 INFO L276 IsEmpty]: Start isEmpty. Operand 413220 states and 900761 transitions. [2021-04-15 03:34:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:34:35,022 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:34:35,022 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:34:35,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:34:35,239 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:34:35,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:34:35,239 INFO L82 PathProgramCache]: Analyzing trace with hash 2140191879, now seen corresponding path program 159 times [2021-04-15 03:34:35,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:34:35,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609263474] [2021-04-15 03:34:35,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:34:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:34:35,305 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 182 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:34:35,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609263474] [2021-04-15 03:34:35,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432722623] [2021-04-15 03:34:35,306 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:34:35,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-04-15 03:34:35,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:34:35,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:34:35,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:34:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 182 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:34:35,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:34:35,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-04-15 03:34:35,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645555839] [2021-04-15 03:34:35,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:34:35,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:34:35,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:34:35,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:34:35,488 INFO L87 Difference]: Start difference. First operand 413220 states and 900761 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:37,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:34:37,796 INFO L93 Difference]: Finished difference Result 497004 states and 1077768 transitions. [2021-04-15 03:34:37,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:34:37,796 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:34:37,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:34:38,804 INFO L225 Difference]: With dead ends: 497004 [2021-04-15 03:34:38,805 INFO L226 Difference]: Without dead ends: 497004 [2021-04-15 03:34:38,805 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 151.1ms TimeCoverageRelationStatistics Valid=307, Invalid=505, Unknown=0, NotChecked=0, Total=812 [2021-04-15 03:34:39,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497004 states. [2021-04-15 03:34:45,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497004 to 413420. [2021-04-15 03:34:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413420 states, 413419 states have (on average 2.179457160894879) internal successors, (901029), 413419 states have internal predecessors, (901029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:47,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413420 states to 413420 states and 901029 transitions. [2021-04-15 03:34:47,285 INFO L78 Accepts]: Start accepts. Automaton has 413420 states and 901029 transitions. Word has length 96 [2021-04-15 03:34:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:34:47,285 INFO L480 AbstractCegarLoop]: Abstraction has 413420 states and 901029 transitions. [2021-04-15 03:34:47,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:47,285 INFO L276 IsEmpty]: Start isEmpty. Operand 413420 states and 901029 transitions. [2021-04-15 03:34:47,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:34:47,536 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:34:47,536 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:34:47,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-04-15 03:34:47,737 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:34:47,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:34:47,737 INFO L82 PathProgramCache]: Analyzing trace with hash 278720613, now seen corresponding path program 160 times [2021-04-15 03:34:47,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:34:47,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196502187] [2021-04-15 03:34:47,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:34:47,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:34:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 161 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:34:47,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196502187] [2021-04-15 03:34:47,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415344863] [2021-04-15 03:34:47,805 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:34:47,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:34:47,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:34:47,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:34:47,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:34:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 161 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:34:47,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:34:47,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-04-15 03:34:47,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214752726] [2021-04-15 03:34:47,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:34:47,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:34:47,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:34:47,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:34:47,952 INFO L87 Difference]: Start difference. First operand 413420 states and 901029 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:49,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:34:49,849 INFO L93 Difference]: Finished difference Result 465380 states and 1009820 transitions. [2021-04-15 03:34:49,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-04-15 03:34:49,850 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:34:49,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:34:50,561 INFO L225 Difference]: With dead ends: 465380 [2021-04-15 03:34:50,562 INFO L226 Difference]: Without dead ends: 465380 [2021-04-15 03:34:50,562 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=321, Invalid=549, Unknown=0, NotChecked=0, Total=870 [2021-04-15 03:34:51,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465380 states. [2021-04-15 03:34:57,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465380 to 414060. [2021-04-15 03:34:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414060 states, 414059 states have (on average 2.1791797787271863) internal successors, (902309), 414059 states have internal predecessors, (902309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:58,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414060 states to 414060 states and 902309 transitions. [2021-04-15 03:34:58,907 INFO L78 Accepts]: Start accepts. Automaton has 414060 states and 902309 transitions. Word has length 96 [2021-04-15 03:34:58,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:34:58,907 INFO L480 AbstractCegarLoop]: Abstraction has 414060 states and 902309 transitions. [2021-04-15 03:34:58,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:34:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand 414060 states and 902309 transitions. [2021-04-15 03:34:59,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:34:59,162 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:34:59,162 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:34:59,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:34:59,362 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:34:59,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:34:59,363 INFO L82 PathProgramCache]: Analyzing trace with hash 553698183, now seen corresponding path program 161 times [2021-04-15 03:34:59,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:34:59,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664500472] [2021-04-15 03:34:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:34:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:34:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:34:59,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664500472] [2021-04-15 03:34:59,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358614366] [2021-04-15 03:34:59,437 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:34:59,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-04-15 03:34:59,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:34:59,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:34:59,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:34:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:34:59,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:34:59,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-04-15 03:34:59,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989872759] [2021-04-15 03:34:59,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:34:59,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:34:59,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:34:59,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:34:59,593 INFO L87 Difference]: Start difference. First operand 414060 states and 902309 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:35:01,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:35:01,380 INFO L93 Difference]: Finished difference Result 430906 states and 940689 transitions. [2021-04-15 03:35:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:35:01,381 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:35:01,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:35:02,049 INFO L225 Difference]: With dead ends: 430906 [2021-04-15 03:35:02,050 INFO L226 Difference]: Without dead ends: 430906 [2021-04-15 03:35:02,050 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=283, Invalid=529, Unknown=0, NotChecked=0, Total=812 [2021-04-15 03:35:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430906 states. [2021-04-15 03:35:07,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430906 to 401228. [2021-04-15 03:35:07,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401228 states, 401227 states have (on average 2.1776525508004196) internal successors, (873733), 401227 states have internal predecessors, (873733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:35:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401228 states to 401228 states and 873733 transitions. [2021-04-15 03:35:10,075 INFO L78 Accepts]: Start accepts. Automaton has 401228 states and 873733 transitions. Word has length 96 [2021-04-15 03:35:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:35:10,076 INFO L480 AbstractCegarLoop]: Abstraction has 401228 states and 873733 transitions. [2021-04-15 03:35:10,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:35:10,076 INFO L276 IsEmpty]: Start isEmpty. Operand 401228 states and 873733 transitions. [2021-04-15 03:35:10,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:35:10,335 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:35:10,335 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:35:10,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:35:10,549 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:35:10,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:35:10,549 INFO L82 PathProgramCache]: Analyzing trace with hash 449615781, now seen corresponding path program 162 times [2021-04-15 03:35:10,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:35:10,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394304187] [2021-04-15 03:35:10,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:35:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:35:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 200 proven. 96 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:35:10,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394304187] [2021-04-15 03:35:10,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567021746] [2021-04-15 03:35:10,600 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:35:10,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-04-15 03:35:10,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:35:10,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:35:10,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:35:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 200 proven. 96 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:35:10,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:35:10,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:35:10,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802978332] [2021-04-15 03:35:10,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:35:10,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:35:10,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:35:10,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:35:10,763 INFO L87 Difference]: Start difference. First operand 401228 states and 873733 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:35:12,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:35:12,779 INFO L93 Difference]: Finished difference Result 424850 states and 924011 transitions. [2021-04-15 03:35:12,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:35:12,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:35:12,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:35:13,612 INFO L225 Difference]: With dead ends: 424850 [2021-04-15 03:35:13,612 INFO L226 Difference]: Without dead ends: 424778 [2021-04-15 03:35:13,612 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:35:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424778 states. [2021-04-15 03:35:19,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424778 to 401892. [2021-04-15 03:35:19,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401892 states, 401891 states have (on average 2.1778666354807648) internal successors, (875265), 401891 states have internal predecessors, (875265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:35:20,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401892 states to 401892 states and 875265 transitions. [2021-04-15 03:35:20,924 INFO L78 Accepts]: Start accepts. Automaton has 401892 states and 875265 transitions. Word has length 96 [2021-04-15 03:35:20,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:35:20,925 INFO L480 AbstractCegarLoop]: Abstraction has 401892 states and 875265 transitions. [2021-04-15 03:35:20,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:35:20,925 INFO L276 IsEmpty]: Start isEmpty. Operand 401892 states and 875265 transitions. [2021-04-15 03:35:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:35:21,154 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:35:21,154 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:35:21,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:35:21,354 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:35:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:35:21,355 INFO L82 PathProgramCache]: Analyzing trace with hash -198417829, now seen corresponding path program 163 times [2021-04-15 03:35:21,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:35:21,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192072599] [2021-04-15 03:35:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:35:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:35:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 235 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:35:21,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192072599] [2021-04-15 03:35:21,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104966075] [2021-04-15 03:35:21,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:35:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:35:21,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:35:21,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:35:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 235 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:35:21,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:35:21,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:35:21,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152174465] [2021-04-15 03:35:21,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:35:21,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:35:21,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:35:21,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:35:21,549 INFO L87 Difference]: Start difference. First operand 401892 states and 875265 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:35:23,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:35:23,440 INFO L93 Difference]: Finished difference Result 419176 states and 910606 transitions. [2021-04-15 03:35:23,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:35:23,440 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:35:23,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:35:24,132 INFO L225 Difference]: With dead ends: 419176 [2021-04-15 03:35:24,132 INFO L226 Difference]: Without dead ends: 419134 [2021-04-15 03:35:24,133 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:35:25,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419134 states. [2021-04-15 03:35:30,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419134 to 407336. [2021-04-15 03:35:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407336 states, 407335 states have (on average 2.1785532792419016) internal successors, (887401), 407335 states have internal predecessors, (887401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:35:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407336 states to 407336 states and 887401 transitions. [2021-04-15 03:35:31,497 INFO L78 Accepts]: Start accepts. Automaton has 407336 states and 887401 transitions. Word has length 96 [2021-04-15 03:35:31,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:35:31,497 INFO L480 AbstractCegarLoop]: Abstraction has 407336 states and 887401 transitions. [2021-04-15 03:35:31,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:35:31,497 INFO L276 IsEmpty]: Start isEmpty. Operand 407336 states and 887401 transitions. [2021-04-15 03:35:32,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:35:32,405 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:35:32,405 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:35:32,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-04-15 03:35:32,643 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:35:32,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:35:32,644 INFO L82 PathProgramCache]: Analyzing trace with hash 106307791, now seen corresponding path program 164 times [2021-04-15 03:35:32,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:35:32,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701792205] [2021-04-15 03:35:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:35:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:35:32,697 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 207 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:35:32,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701792205] [2021-04-15 03:35:32,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350102237] [2021-04-15 03:35:32,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:35:32,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:35:32,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:35:32,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:35:32,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:35:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 207 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:35:32,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:35:32,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:35:32,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321472596] [2021-04-15 03:35:32,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:35:32,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:35:32,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:35:32,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:35:32,853 INFO L87 Difference]: Start difference. First operand 407336 states and 887401 transitions. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:35:34,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:35:34,198 INFO L93 Difference]: Finished difference Result 432146 states and 937019 transitions. [2021-04-15 03:35:34,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:35:34,199 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:35:34,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:35:35,365 INFO L225 Difference]: With dead ends: 432146 [2021-04-15 03:35:35,365 INFO L226 Difference]: Without dead ends: 432146 [2021-04-15 03:35:35,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:35:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432146 states. [2021-04-15 03:35:40,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432146 to 407536. [2021-04-15 03:35:41,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407536 states, 407535 states have (on average 2.178485283472585) internal successors, (887809), 407535 states have internal predecessors, (887809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:35:42,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407536 states to 407536 states and 887809 transitions. [2021-04-15 03:35:42,859 INFO L78 Accepts]: Start accepts. Automaton has 407536 states and 887809 transitions. Word has length 96 [2021-04-15 03:35:42,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:35:42,859 INFO L480 AbstractCegarLoop]: Abstraction has 407536 states and 887809 transitions. [2021-04-15 03:35:42,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 11 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:35:42,860 INFO L276 IsEmpty]: Start isEmpty. Operand 407536 states and 887809 transitions. [2021-04-15 03:35:43,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:35:43,401 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:35:43,401 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:35:43,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:35:43,617 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:35:43,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:35:43,617 INFO L82 PathProgramCache]: Analyzing trace with hash 496511717, now seen corresponding path program 165 times [2021-04-15 03:35:43,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:35:43,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856511962] [2021-04-15 03:35:43,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:35:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:35:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:35:43,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856511962] [2021-04-15 03:35:43,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73353594] [2021-04-15 03:35:43,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:35:43,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-04-15 03:35:43,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:35:43,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:35:43,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:35:43,836 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 205 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:35:43,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:35:43,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-04-15 03:35:43,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950706817] [2021-04-15 03:35:43,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:35:43,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:35:43,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:35:43,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:35:43,836 INFO L87 Difference]: Start difference. First operand 407536 states and 887809 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:35:46,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:35:46,030 INFO L93 Difference]: Finished difference Result 488982 states and 1058761 transitions. [2021-04-15 03:35:46,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:35:46,031 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:35:46,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:35:47,145 INFO L225 Difference]: With dead ends: 488982 [2021-04-15 03:35:47,145 INFO L226 Difference]: Without dead ends: 488982 [2021-04-15 03:35:47,145 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=268, Invalid=434, Unknown=0, NotChecked=0, Total=702 [2021-04-15 03:35:47,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488982 states. [2021-04-15 03:35:52,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488982 to 408416. [2021-04-15 03:35:53,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408416 states, 408415 states have (on average 2.178090912429759) internal successors, (889565), 408415 states have internal predecessors, (889565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:35:54,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408416 states to 408416 states and 889565 transitions. [2021-04-15 03:35:54,928 INFO L78 Accepts]: Start accepts. Automaton has 408416 states and 889565 transitions. Word has length 96 [2021-04-15 03:35:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:35:54,928 INFO L480 AbstractCegarLoop]: Abstraction has 408416 states and 889565 transitions. [2021-04-15 03:35:54,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:35:54,928 INFO L276 IsEmpty]: Start isEmpty. Operand 408416 states and 889565 transitions. [2021-04-15 03:35:55,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:35:55,168 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:35:55,168 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:35:55,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-04-15 03:35:55,368 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:35:55,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:35:55,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1949376647, now seen corresponding path program 166 times [2021-04-15 03:35:55,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:35:55,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778468488] [2021-04-15 03:35:55,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:35:55,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:35:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 189 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:35:55,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778468488] [2021-04-15 03:35:55,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251047932] [2021-04-15 03:35:55,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:35:55,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:35:55,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:35:55,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:35:55,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:35:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 189 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:35:55,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:35:55,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-04-15 03:35:55,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806303087] [2021-04-15 03:35:55,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:35:55,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:35:55,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:35:55,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:35:55,587 INFO L87 Difference]: Start difference. First operand 408416 states and 889565 transitions. Second operand has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:35:57,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:35:57,595 INFO L93 Difference]: Finished difference Result 500230 states and 1083955 transitions. [2021-04-15 03:35:57,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 03:35:57,596 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:35:57,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:35:58,964 INFO L225 Difference]: With dead ends: 500230 [2021-04-15 03:35:58,964 INFO L226 Difference]: Without dead ends: 500230 [2021-04-15 03:35:58,964 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=350, Invalid=580, Unknown=0, NotChecked=0, Total=930 [2021-04-15 03:35:59,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500230 states. [2021-04-15 03:36:04,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500230 to 409316. [2021-04-15 03:36:05,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409316 states, 409315 states have (on average 2.177748189047555) internal successors, (891385), 409315 states have internal predecessors, (891385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:36:06,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409316 states to 409316 states and 891385 transitions. [2021-04-15 03:36:06,756 INFO L78 Accepts]: Start accepts. Automaton has 409316 states and 891385 transitions. Word has length 96 [2021-04-15 03:36:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:36:06,756 INFO L480 AbstractCegarLoop]: Abstraction has 409316 states and 891385 transitions. [2021-04-15 03:36:06,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 6.857142857142857) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:36:06,756 INFO L276 IsEmpty]: Start isEmpty. Operand 409316 states and 891385 transitions. [2021-04-15 03:36:06,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:36:06,974 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:36:06,974 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:36:07,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-04-15 03:36:07,177 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:36:07,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:36:07,177 INFO L82 PathProgramCache]: Analyzing trace with hash 87905381, now seen corresponding path program 167 times [2021-04-15 03:36:07,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:36:07,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542547392] [2021-04-15 03:36:07,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:36:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:36:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 173 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:36:07,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542547392] [2021-04-15 03:36:07,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696724980] [2021-04-15 03:36:07,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:36:07,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-04-15 03:36:07,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:36:07,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:36:07,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:36:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 173 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:36:07,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:36:07,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-04-15 03:36:07,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29674836] [2021-04-15 03:36:07,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:36:07,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:36:07,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:36:07,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:36:07,402 INFO L87 Difference]: Start difference. First operand 409316 states and 891385 transitions. Second operand has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:36:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:36:09,348 INFO L93 Difference]: Finished difference Result 484574 states and 1051121 transitions. [2021-04-15 03:36:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 03:36:09,348 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:36:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:36:10,084 INFO L225 Difference]: With dead ends: 484574 [2021-04-15 03:36:10,084 INFO L226 Difference]: Without dead ends: 484574 [2021-04-15 03:36:10,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=394, Invalid=662, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 03:36:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484574 states. [2021-04-15 03:36:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484574 to 409896. [2021-04-15 03:36:16,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409896 states, 409895 states have (on average 2.1773405384305735) internal successors, (892481), 409895 states have internal predecessors, (892481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:36:17,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409896 states to 409896 states and 892481 transitions. [2021-04-15 03:36:17,650 INFO L78 Accepts]: Start accepts. Automaton has 409896 states and 892481 transitions. Word has length 96 [2021-04-15 03:36:17,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:36:17,650 INFO L480 AbstractCegarLoop]: Abstraction has 409896 states and 892481 transitions. [2021-04-15 03:36:17,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.4) internal successors, (96), 14 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:36:17,650 INFO L276 IsEmpty]: Start isEmpty. Operand 409896 states and 892481 transitions. [2021-04-15 03:36:18,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:36:18,633 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:36:18,633 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:36:18,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-04-15 03:36:18,834 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:36:18,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:36:18,834 INFO L82 PathProgramCache]: Analyzing trace with hash 362882951, now seen corresponding path program 168 times [2021-04-15 03:36:18,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:36:18,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769572847] [2021-04-15 03:36:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:36:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:36:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 157 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:36:18,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769572847] [2021-04-15 03:36:18,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673831666] [2021-04-15 03:36:18,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:36:18,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-04-15 03:36:18,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:36:18,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:36:18,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:36:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 157 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:36:19,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:36:19,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-04-15 03:36:19,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279488729] [2021-04-15 03:36:19,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:36:19,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:36:19,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:36:19,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:36:19,060 INFO L87 Difference]: Start difference. First operand 409896 states and 892481 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:36:21,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:36:21,112 INFO L93 Difference]: Finished difference Result 452934 states and 982423 transitions. [2021-04-15 03:36:21,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:36:21,112 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:36:21,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:36:22,071 INFO L225 Difference]: With dead ends: 452934 [2021-04-15 03:36:22,072 INFO L226 Difference]: Without dead ends: 452934 [2021-04-15 03:36:22,072 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=385, Invalid=671, Unknown=0, NotChecked=0, Total=1056 [2021-04-15 03:36:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452934 states. [2021-04-15 03:36:27,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452934 to 410776. [2021-04-15 03:36:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410776 states, 410775 states have (on average 2.1769606232122207) internal successors, (894241), 410775 states have internal predecessors, (894241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:36:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410776 states to 410776 states and 894241 transitions. [2021-04-15 03:36:29,524 INFO L78 Accepts]: Start accepts. Automaton has 410776 states and 894241 transitions. Word has length 96 [2021-04-15 03:36:29,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:36:29,524 INFO L480 AbstractCegarLoop]: Abstraction has 410776 states and 894241 transitions. [2021-04-15 03:36:29,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:36:29,524 INFO L276 IsEmpty]: Start isEmpty. Operand 410776 states and 894241 transitions. [2021-04-15 03:36:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:36:29,778 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:36:29,778 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:36:29,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-04-15 03:36:29,979 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:36:29,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:36:29,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1973198309, now seen corresponding path program 169 times [2021-04-15 03:36:29,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:36:29,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169655229] [2021-04-15 03:36:29,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:36:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:36:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:36:30,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169655229] [2021-04-15 03:36:30,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436133181] [2021-04-15 03:36:30,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:36:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:36:30,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:36:30,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:36:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 141 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:36:30,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:36:30,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-04-15 03:36:30,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142684175] [2021-04-15 03:36:30,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:36:30,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:36:30,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:36:30,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:36:30,213 INFO L87 Difference]: Start difference. First operand 410776 states and 894241 transitions. Second operand has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:36:32,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:36:32,123 INFO L93 Difference]: Finished difference Result 425560 states and 927070 transitions. [2021-04-15 03:36:32,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:36:32,124 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:36:32,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:36:32,781 INFO L225 Difference]: With dead ends: 425560 [2021-04-15 03:36:32,781 INFO L226 Difference]: Without dead ends: 425560 [2021-04-15 03:36:32,781 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 173.2ms TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2021-04-15 03:36:33,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425560 states. [2021-04-15 03:36:38,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425560 to 404836. [2021-04-15 03:36:38,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404836 states, 404835 states have (on average 2.178163943334939) internal successors, (881797), 404835 states have internal predecessors, (881797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:36:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404836 states to 404836 states and 881797 transitions. [2021-04-15 03:36:40,190 INFO L78 Accepts]: Start accepts. Automaton has 404836 states and 881797 transitions. Word has length 96 [2021-04-15 03:36:40,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:36:40,190 INFO L480 AbstractCegarLoop]: Abstraction has 404836 states and 881797 transitions. [2021-04-15 03:36:40,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.647058823529412) internal successors, (96), 16 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:36:40,190 INFO L276 IsEmpty]: Start isEmpty. Operand 404836 states and 881797 transitions. [2021-04-15 03:36:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:36:40,422 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:36:40,422 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:36:40,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:36:40,623 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:36:40,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:36:40,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2072034489, now seen corresponding path program 170 times [2021-04-15 03:36:40,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:36:40,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302709910] [2021-04-15 03:36:40,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:36:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:36:40,698 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 113 proven. 177 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-04-15 03:36:40,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302709910] [2021-04-15 03:36:40,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941461640] [2021-04-15 03:36:40,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:36:40,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:36:40,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:36:40,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:36:40,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:36:40,843 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 113 proven. 177 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-04-15 03:36:40,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:36:40,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-04-15 03:36:40,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734493328] [2021-04-15 03:36:40,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:36:40,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:36:40,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:36:40,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:36:40,844 INFO L87 Difference]: Start difference. First operand 404836 states and 881797 transitions. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:36:42,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:36:42,821 INFO L93 Difference]: Finished difference Result 422860 states and 919321 transitions. [2021-04-15 03:36:42,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 03:36:42,822 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:36:42,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:36:43,480 INFO L225 Difference]: With dead ends: 422860 [2021-04-15 03:36:43,480 INFO L226 Difference]: Without dead ends: 422704 [2021-04-15 03:36:43,481 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2021-04-15 03:36:44,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422704 states. [2021-04-15 03:36:48,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422704 to 408288. [2021-04-15 03:36:49,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408288 states, 408287 states have (on average 2.179890616159711) internal successors, (890021), 408287 states have internal predecessors, (890021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:36:50,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408288 states to 408288 states and 890021 transitions. [2021-04-15 03:36:50,876 INFO L78 Accepts]: Start accepts. Automaton has 408288 states and 890021 transitions. Word has length 96 [2021-04-15 03:36:50,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:36:50,876 INFO L480 AbstractCegarLoop]: Abstraction has 408288 states and 890021 transitions. [2021-04-15 03:36:50,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 14 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:36:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 408288 states and 890021 transitions. [2021-04-15 03:36:51,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:36:51,102 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:36:51,102 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:36:51,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-04-15 03:36:51,303 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:36:51,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:36:51,306 INFO L82 PathProgramCache]: Analyzing trace with hash 304123099, now seen corresponding path program 171 times [2021-04-15 03:36:51,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:36:51,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663049497] [2021-04-15 03:36:51,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:36:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:36:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 118 proven. 169 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-04-15 03:36:51,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663049497] [2021-04-15 03:36:51,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004486876] [2021-04-15 03:36:51,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:36:51,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-04-15 03:36:51,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:36:51,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:36:51,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:36:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 118 proven. 169 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-04-15 03:36:51,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:36:51,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-04-15 03:36:51,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392959879] [2021-04-15 03:36:51,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:36:51,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:36:51,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:36:51,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:36:51,517 INFO L87 Difference]: Start difference. First operand 408288 states and 890021 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:36:53,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:36:53,379 INFO L93 Difference]: Finished difference Result 413118 states and 897655 transitions. [2021-04-15 03:36:53,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:36:53,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:36:53,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:36:54,074 INFO L225 Difference]: With dead ends: 413118 [2021-04-15 03:36:54,074 INFO L226 Difference]: Without dead ends: 412992 [2021-04-15 03:36:54,074 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:36:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412992 states. [2021-04-15 03:36:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412992 to 408288. [2021-04-15 03:37:00,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408288 states, 408287 states have (on average 2.1797926458594077) internal successors, (889981), 408287 states have internal predecessors, (889981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:02,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408288 states to 408288 states and 889981 transitions. [2021-04-15 03:37:02,084 INFO L78 Accepts]: Start accepts. Automaton has 408288 states and 889981 transitions. Word has length 96 [2021-04-15 03:37:02,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:37:02,084 INFO L480 AbstractCegarLoop]: Abstraction has 408288 states and 889981 transitions. [2021-04-15 03:37:02,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:02,084 INFO L276 IsEmpty]: Start isEmpty. Operand 408288 states and 889981 transitions. [2021-04-15 03:37:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:37:02,331 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:37:02,331 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:37:02,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:02,545 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:37:02,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:37:02,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1367686555, now seen corresponding path program 172 times [2021-04-15 03:37:02,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:37:02,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235870105] [2021-04-15 03:37:02,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:37:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:37:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 159 proven. 131 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-04-15 03:37:02,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235870105] [2021-04-15 03:37:02,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762905977] [2021-04-15 03:37:02,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:02,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:37:02,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:37:02,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:37:02,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:37:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 159 proven. 131 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-04-15 03:37:02,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:37:02,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:37:02,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996936673] [2021-04-15 03:37:02,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:37:02,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:37:02,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:37:02,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:37:02,746 INFO L87 Difference]: Start difference. First operand 408288 states and 889981 transitions. Second operand has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:37:04,736 INFO L93 Difference]: Finished difference Result 423082 states and 920699 transitions. [2021-04-15 03:37:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:37:04,737 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:37:04,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:37:05,546 INFO L225 Difference]: With dead ends: 423082 [2021-04-15 03:37:05,546 INFO L226 Difference]: Without dead ends: 423016 [2021-04-15 03:37:05,546 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:37:06,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423016 states. [2021-04-15 03:37:11,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423016 to 419568. [2021-04-15 03:37:11,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419568 states, 419567 states have (on average 2.1813560170366117) internal successors, (915225), 419567 states have internal predecessors, (915225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:12,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419568 states to 419568 states and 915225 transitions. [2021-04-15 03:37:12,501 INFO L78 Accepts]: Start accepts. Automaton has 419568 states and 915225 transitions. Word has length 96 [2021-04-15 03:37:12,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:37:12,501 INFO L480 AbstractCegarLoop]: Abstraction has 419568 states and 915225 transitions. [2021-04-15 03:37:12,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 7.166666666666667) internal successors, (86), 11 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:12,501 INFO L276 IsEmpty]: Start isEmpty. Operand 419568 states and 915225 transitions. [2021-04-15 03:37:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-04-15 03:37:12,804 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:37:12,804 INFO L551 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:37:13,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:13,005 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:37:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:37:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash 2130510535, now seen corresponding path program 173 times [2021-04-15 03:37:13,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:37:13,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61764213] [2021-04-15 03:37:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:37:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:37:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 192 proven. 104 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:37:13,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61764213] [2021-04-15 03:37:13,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906360653] [2021-04-15 03:37:13,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:13,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-04-15 03:37:13,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:37:13,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:37:13,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:37:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 192 proven. 104 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-04-15 03:37:13,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:37:13,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-04-15 03:37:13,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492020318] [2021-04-15 03:37:13,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:37:13,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:37:13,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:37:13,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:37:13,204 INFO L87 Difference]: Start difference. First operand 419568 states and 915225 transitions. Second operand has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:37:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:37:15,364 INFO L93 Difference]: Finished difference Result 441660 states and 962444 transitions. [2021-04-15 03:37:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:37:15,364 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.75) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-04-15 03:37:15,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. Received shutdown request... [2021-04-15 03:37:16,680 INFO L225 Difference]: With dead ends: 441660 [2021-04-15 03:37:16,681 INFO L226 Difference]: Without dead ends: 441588 [2021-04-15 03:37:16,681 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:37:17,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441588 states. [2021-04-15 03:37:17,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:37:17,272 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 03:37:17,275 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 03:37:17,276 INFO L202 PluginConnector]: Adding new model misc-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 03:37:17 BasicIcfg [2021-04-15 03:37:17,276 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 03:37:17,277 INFO L168 Benchmark]: Toolchain (without parser) took 677062.59 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.6 MB in the beginning and 10.8 GB in the end (delta: -10.6 GB). Peak memory consumption was 5.6 GB. Max. memory is 16.0 GB. [2021-04-15 03:37:17,277 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 03:37:17,277 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.74 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 03:37:17,277 INFO L168 Benchmark]: Boogie Preprocessor took 11.91 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.2 MB in the end (delta: 820.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 03:37:17,277 INFO L168 Benchmark]: RCFGBuilder took 249.25 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 239.0 MB in the end (delta: -4.8 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. [2021-04-15 03:37:17,277 INFO L168 Benchmark]: TraceAbstraction took 676768.84 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 239.0 MB in the beginning and 10.8 GB in the end (delta: -10.6 GB). Peak memory consumption was 5.6 GB. Max. memory is 16.0 GB. [2021-04-15 03:37:17,277 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.74 ms. Allocated memory is still 255.9 MB. Free memory was 236.6 MB in the beginning and 235.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.91 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.2 MB in the end (delta: 820.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 249.25 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 239.0 MB in the end (delta: -4.8 MB). Peak memory consumption was 20.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 676768.84 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 239.0 MB in the beginning and 10.8 GB in the end (delta: -10.6 GB). Peak memory consumption was 5.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 59). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 676687.1ms, OverallIterations: 186, TraceHistogramMax: 11, EmptinessCheckTime: 21158.3ms, AutomataDifference: 168114.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14349 SDtfs, 46837 SDslu, 61260 SDs, 0 SdLazy, 28582 SolverSat, 4751 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13981.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15975 GetRequests, 12546 SyntacticMatches, 100 SemanticMatches, 3329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27989 ImplicationChecksByTransitivity, 21328.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=419568occurred in iteration=185, InterpolantAutomatonStates: 3282, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 416533.3ms AutomataMinimizationTime, 186 MinimizatonAttempts, 2039712 StatesRemovedByMinimization, 185 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 869.1ms SsaConstructionTime, 2448.6ms SatisfiabilityAnalysisTime, 27715.5ms InterpolantComputationTime, 24136 NumberOfCodeBlocks, 24070 NumberOfCodeBlocksAsserted, 1008 NumberOfCheckSat, 23770 ConstructedInterpolants, 0 QuantifiedInterpolants, 105861 SizeOfPredicates, 362 NumberOfNonLiveVariables, 18627 ConjunctsInSsa, 2583 ConjunctsInUnsatCore, 366 InterpolantComputations, 6 PerfectInterpolantSequences, 28616/53052 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